Document:

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                                                                   Exhibit 10.11

                                 EXPEDIA, INC.

            1999 AMENDED AND RESTATED EMPLOYEE STOCK PURCHASE PLAN

     Expedia, Inc. (the "Company") does hereby establish its 1999 Amended and
Restated Employee Stock Purchase Plan (the "Plan") as follows:

     1.  Purpose of the Plan.  The purpose of this Plan is to provide eligible
         -------------------
employees who wish to become shareholders in the Company a convenient method of
doing so.  It is believed that employee participation in the ownership of the
business will be to the mutual benefit of both the employees and the Company.

     2.  Definitions.
         -----------

         2.1  "Base pay" means regular straight time earnings, plus review cycle
bonuses and overtime payments, payments for incentive compensation, and other
special payments except to the extent that any such item is specifically
excluded by the Board of Directors of the Company (the "Board").

         2.2  "Account" shall mean the funds accumulated with respect to an
individual employee as a result of deductions from his paycheck for the purpose
of purchasing stock under this Plan.  The funds allocated to an employee's
account shall remain the property of the respective employee at all times but
may be commingled with the general funds of the Company.

     3.  Employees Eligible to Participate.  Any employee of the Company or any
         ---------------------------------
of its subsidiaries who is in the employ of the Company or subsidiary on an
offering commencement date is eligible to participate in that offering, except
(a) employees whose customary employment is less than 20 hours per week, and (b)
employees whose customary employment is for not more than five months in any
calendar year.

     4.  Offerings.  There will be twelve separate consecutive six-month
         ---------
offerings pursuant to the Plan.  The first offering shall commence on January 1,
2000.  Thereafter, offerings shall commence on each subsequent July 1 and
January 1, and the final offering under this Plan shall commence on July 1, 2005
and terminate on December 31, 2005.  In order to become eligible to purchase
shares, an employee must sign an Enrollment Agreement, and any other necessary
papers on or before the commencement date (January 1 or July 1) of the
particular offering in which he wishes to participate.  Participation in one
offering under the Plan shall neither limit, nor require, participation in any
other offering.

     5.  Price.  The purchase price per share shall be the lesser of (1) 85% of
         -----
the fair market value of the stock on the offering date; or (2) 85% of the fair
market value of the stock on the last business day of the offering.  Fair market
value shall mean the closing bid price as reported on the National Association
of Securities Dealers Automated Quotation System or, if the stock is traded on a
stock exchange, the closing price for the stock on the principal such exchange.

     6.  Offering Date.  The "offering date" as used in this Plan shall be the
         -------------
commencement date of the offering, if such date is a regular business day, or
the first regular business day following such commencement date.  A different
date may be set by resolution of the Board.
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     7.  Number of Shares to be Offered.  The maximum number of shares that will
         ------------------------------
be offered under the Plan is 300,000 shares.  The shares to be sold to
participants under the Plan will be common stock of the Company.  If the total
number of shares for which options are to be granted on any date in accordance
with Section 10 exceeds the number of shares then available under the Plan
(after deduction of all shares for which options have been exercised or are then
outstanding), the Company shall make a pro rata allocation of the shares
remaining available in as nearly a uniform manner as shall be practicable and as
it shall determine to be equitable.  In such event, the payroll deductions to be
made pursuant to the authorizations therefor shall be reduced accordingly and
the Company shall give written notice of such reduction to each employee
affected thereby.

     8.  Participation.
         -------------

         8.1  An eligible employee may become a participant by completing an
Enrollment Agreement provided by the Company and filing it with Shareholder
Services prior to the Commencement of the offering to which it relates.

         8.2  Payroll deductions for a participant shall commence on the
offering date, and shall end on the termination date of such offering unless
earlier terminated by the employee as provided in Paragraph 14.

     9.  Payroll Deductions.
         ------------------

         9.1  At the time a participant files his authorization for a payroll
deduction, he shall elect to have deductions made from his pay on each payday
during the time he is a participant in an offering at the rate of 1% to 10% of
his base pay on a whole percentage basis.

         9.2  All payroll deductions made for a participant shall be credited to
his account under the Plan. A participant may not make any separate cash payment
into such account nor may payment for shares be made other than by payroll
deduction.

         9.3  A participant may discontinue his participation in the Plan as
provided in Section 14, but no other change can be made during an offering and,
specifically, a participant may not alter the rate of his payroll deductions for
that offering.

     10. Granting of Option.  On the offering date, this Plan shall be deemed
         ------------------
to have granted to the participant an option for as many full shares as he will
be able to purchase with the payroll deductions credited to his account during
his participation in that offering.

     11. Exercise of Option.  Each employee who continues to be a participant
         ------------------
in an offering on the last business day of that offering shall be deemed to have
exercised his option on such date and shall be deemed to have purchased from the
Company such number of full shares of common stock reserved for the purpose of
the Plan as his accumulated payroll deductions on such date will pay for at the
option price.

     12. Employee's Rights as a Shareholder.  No participating employee shall
         ----------------------------------
have any right as a shareholder with respect to any shares until the shares have
been purchased in accordance with Section 11 above and the stock has been issued
by the Company.

     13.  Evidence of Stock Ownership.
          ---------------------------

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          13.1  Promptly following the end of each offering, the number of
shares of common stock purchased by each participant shall be deposited into an
account established in the participant's name at a stock brokerage or other
financial services firm designated by the Company (the "ESPP Broker").

          13.2  The participant may direct, by written notice to the Company at
the time of his enrollment in the Plan, that his ESPP Broker account be
established in the names of the participant and one other person designated by
the participant, as joint tenants with right of survivorship, tenants in common,
or community property, to the extent and in the manner permitted by applicable
law.

          13.3  A participant shall be free to undertake a disposition (as that
term is defined in Section 424(c) of the Code) of the shares in his account at
any time, whether by sale, exchange, gift, or other transfer of legal title, but
in the absence of such a disposition of the shares, the shares must remain in
the participant's account at the ESPP Broker until the holding period set forth
in Section 423(a) of the Code has been satisfied. With respect to shares for
which the Section 423(a) holding period has been satisfied, the participant may
move those shares to another brokerage account of participant's choosing or
request that a stock certificate be issued and delivered to him.

          13.4  A participant who is not subject to payment of U.S. income taxes
may move his shares to another brokerage account of his choosing or request that
a stock certificate be issued and delivered to him at any time, without regard
to the satisfaction of the Section 423(a) holding period.

     14.  Withdrawal.
          ----------

          14.1  An employee may withdraw from an offering, in whole but not in
part, at any time prior to the last business day of such offering by delivering
a Withdrawal Notice to the Company, in which event the Company will refund the
entire balance of his deductions as soon as practicable thereafter.

          14.2  To re-enter the Plan, an employee who has previously withdrawn
must file a new Enrollment Agreement in accordance with Section 8.1. The
employee's re-entry into the Plan will not become effective before the beginning
of the next offering following his withdrawal, and if the withdrawing employee
is an officer of the Company within the meaning of Section 16 of the Securities
Exchange Act of 1934 he may not re-enter the Plan before the beginning of the
second offering following his withdrawal.

     15.  Carryover of Account.  At the termination of each offering the Company
          --------------------
shall automatically re-enroll the employee in the next offering, and the balance
in the employee's account shall be used for option exercises in the new
offering, unless the employee has advised the Company otherwise.  Upon
termination of the Plan, the balance of each employee's account shall be
refunded to him.

     16.  Interest.  No interest will be paid or allowed on any money in the
          --------
accounts of participating employees.

     17.  Rights Not Transferable.  No employee shall be permitted to sell,
          -----------------------
assign, transfer, pledge, or otherwise dispose of or encumber either the payroll
deductions credited to his account or any rights with regard to the exercise of
an option or to receive shares under the Plan other than by will or the laws

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of descent and distribution, and such right and interest shall not be liable
for, or subject to, the debts, contracts, or liabilities of the employee. If any
such action is taken by the employee, or any claim is asserted by any other
party in respect of such right and interest whether by garnishment, levy,
attachment or otherwise, such action or claim will be treated as an election to
withdraw funds in accordance with Section 14.

     18.  Termination of Employment.  Upon termination of employment for any
          -------------------------
reason whatsoever, including but not limited to death or retirement, the balance
in the account of a participating employee shall be paid to the employee or his
estate.

     19.  Amendment or Discontinuance of the Plan.  The Board shall have the
          ---------------------------------------
right to amend, modify, or terminate the Plan at any time without notice,
provided that no employee's existing rights under any offering already made
under Section 4 hereof may be adversely affected thereby, and provided further
that no such amendment of the Plan shall, except as provided in Section 20,
increase above 60,000 shares the total number of shares to be offered unless
shareholder approval is obtained therefor.

     20.  Changes in Capitalization.  In the event of reorganization,
          -------------------------
recapitalization, stock split, stock dividend, combination of shares, merger,
consolidation, offerings of rights, or any other change in the structure of the
common shares of the Company, the Board may make such adjustment, if any, as it
may deem appropriate in the number, kind, and the price of shares available for
purchase under the Plan, and in the number of shares which an employee is
entitled to purchase.

     21.  Share Ownership.  Notwithstanding anything herein to the contrary, no
          ---------------
employee shall be permitted to subscribe for any shares under the Plan if such
employee, immediately after such subscription, owns shares (including all shares
which may be purchased under outstanding subscriptions under the Plan)
possessing 5% or more of the total combined voting power or value of all classes
of shares of the Company or of its parent or subsidiary corporations.  For the
foregoing purposes the rules of Section 425(d) of the Internal Revenue Code of
1986 shall apply in determining share ownership.  In addition, no employee shall
be allowed to subscribe for any shares under the Plan which permits his rights
to purchase shares under all "employee stock purchase plans" of the Company and
its subsidiary corporations to accrue at a rate which exceeds $25,000 of the
fair market value of such shares (determined at the time such right to subscribe
is granted) for each calendar year in which such right to subscribe is
outstanding at any time.

     22.  Administration.  The Plan shall be administered by the Board.  The
          --------------
Board may delegate any or all of its authority hereunder to such committee of
the Board or officer of the Company as it may designate.  The administrator
shall be vested with full authority to make, administer, and interpret such
rules and regulations as it deems necessary to administer the Plan, and any
determination, decision, or action of the administrator in connection with the
construction, interpretation, administration, or application of the Plan shall
be final, conclusive, and binding upon all participants and any and all persons
claiming under or through any participant.

     23.  Notices.  All notices or other communications by a participant to the
          -------
Company under or in connection with the Plan shall be deemed to have been duly
given when received by Shareholder Services of the Company or when received in
the form specified by the Company at the location, or by the person, designated
by the Company for the receipt thereof.

     24.  Termination of the Plan.  This Plan shall terminate at the earliest of
          -----------------------
the following:

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          24.1  December 31, 2005.

          24.2  The date of the filing of a Statement of Intent to Dissolve by
the Company or the effective date of a merger or consolidation wherein the
Company is not to be the surviving corporation, which merger or consolidation is
not between or among corporations related to the Company. Prior to the
occurrence of either of such events, on such date as the Company may determine,
the Company may permit a participating employee to exercise the option to
purchase shares for as many full shares as the balance of his account will allow
at the price set forth in accordance with Section 5. If the employee elects to
purchase shares, the remaining balance of his account will be refunded to him
after such purchase.

          24.3  The date the Board acts to terminate the Plan in accordance with
Section 19 above.

          24.3  The date when all shares reserved under the Plan have been
purchased.

     25.  Limitations on Sale of Stock Purchased Under the Plan.  The Plan is
          -----------------------------------------------------
intended to provide common stock for investment and not for resale.  The Company
does not, however, intend to restrict or influence any employee in the conduct
of his own affairs.  An employee, therefore, may sell stock purchased under the
Plan at any time he chooses, subject to compliance with any applicable Federal
or state securities laws.  THE EMPLOYEE ASSUMES THE RISK OF ANY MARKET
FLUCTUATIONS IN THE PRICE OF THE STOCK.

     26.  Governmental Regulation.  The Company's obligation to sell and deliver
          -----------------------
shares of the Company's common stock under this Plan is subject to the approval
of any governmental authority required in connection with the authorization,
issuance, or sale of such shares.

                                       5<PAGE>

                                                                   Exhibit 10.20

Note:  Portions of this exhibit indicated by "[*]" are subject to a confidential
treatment request, and have been omitted from this exhibit. Complete, unredacted
copies of this exhibit have been filed with the Securities and Exchange
Commission as part of Expedia's confidential treatment request.

                             AMENDED AND RESTATED
                             DEVELOPMENT AGREEMENT

     THIS AMENDED AND RESTATED DEVELOPMENT AGREEMENT (this "Agreement") is made
and entered into as of June 28, 2001 (the "Effective Date") by and between
Expedia, Inc. ("EI"), a Washington corporation, and Worldspan, L.P.
("Worldspan"), a Delaware limited partnership.

                                   Recitals

     i.   Whereas, EI is in the business of providing online travel reservations
and related services;

     ii.  Whereas, Worldspan is in the business of providing a computerized
reservation system, information and related transaction processing to airlines,
travel agents, and others in the travel industry;

     iii. Whereas, Worldspan and Microsoft Corporation ("Microsoft") entered
into a Development Agreement dated as of July 1, 1999 (the "1999 Development
Agreement") with respect to the development and implementation of computer
software called BFS;

     iv.  Whereas, Microsoft's rights and obligations under the 1999 Development
Agreement have been assigned to and assumed by EI, which is the successor in
interest to Microsoft for all purposes relating to the 1999 Development
Agreement;

     v.   Whereas, Worldspan and EI wish to amend and supersede the 1999
Development Agreement in its entirety with this Agreement; and

     vi.  Whereas, EI and Worldspan agree to develop and implement BFS and to
undertake and carry out their respective responsibilities as set forth in this
Agreement;

     Now, therefore, in consideration of the above recitals, the mutual
undertakings of the parties as contained herein and other good and valuable
consideration, the parties hereby agree as follows:

                                   Agreement

1.       DEFINITIONS

         1.1  "Advanced BFS Functionality" shall mean BFS functionality that
               --------------------------
builds and prices more than one hundred (100) separate air travel itineraries
for a single trip before returning all or a subset of those itineraries in the
results set for the applicable query.

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         1.2  "Advanced BFS Operational Period" shall mean the period of time
               -------------------------------
commencing on July 1, 2001, and continuing for the remainder of the term of this
Agreement.

         1.3  "Advanced BFS Operational Year" shall mean a twelve (12) month
               -----------------------------
period starting on July 1, 2001, and each subsequent twelve (12) month period
thereafter during the term of this Agreement.

         1.4  "Advanced BFS Transaction" shall mean an electronic transmission
               ------------------------
that (i) is received by the Worldspan System during the Advanced BFS Operational
Period, (ii) requires the Advanced BFS Functionality, and (iii) is not initiated
through Expedia or by EI or an ETT Customer.

         1.5  "Affiliate" shall mean, with respect to any entity, any person,
               ---------
partnership, joint venture, corporation or other form of enterprise, domestic or
foreign, including but not limited to parent companies or subsidiaries, that
directly or indirectly controls, is controlled by, or is under common control
with that entity. For purposes of the preceding sentence, "control" (including,
with its correlative meanings, "controlled by" and "under common control with")
means possession, directly or indirectly, of the power to direct or cause the
direction of management or policies (whether through ownership of securities or
partnership or other ownership interests, by contract or otherwise).

         1.6  "BFS" or "Best Fare Search" shall mean computer software, running
               ---      ----------------
on the Microsoft Windows NT operating system, developed by Microsoft and EI
under the 1999 Development Agreement and this Agreement that performs searches
of airline fare databases and finds the lowest fares for a given flight route,
together with all documentation relating to such software, such as object code,
source code, functional specifications, and operating instructions. In addition
to other provisions in this Agreement, any updates to BFS provided to Worldspan
pursuant to Section 2.1(e) shall be considered part of BFS.

         1.7  "CRS" shall mean a computerized reservation system, such as that
               ---
operated by Worldspan, Amadeus, Sabre, or Galileo.

         1.8  "CRS Agreement" shall mean that certain CRS Marketing, Services
               -------------
and Development Agreement between Microsoft and Worldspan, dated December 15,
1995, as amended from time to time, which agreement and amendments have been
assigned from Microsoft to EI.

         1.9  "Derivative Technology" shall mean: (i) for copyrightable or
               ---------------------
copyrighted material, any translation (including translation into other computer
languages), portation, modification, correction, addition, extension, upgrade,
improvement, compilation, abridgment or other form in which an existing work may
be recast, transformed or adapted; (ii) for patentable or patented material, any
improvement thereon; and (iii) for material that is protected by trade secret,
any new material derived from such existing

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trade secret material, including new material which may be protected by
copyright, patent and/or trade secret.

         1.10 "EI Independent Pricing System" shall mean any computer software
               -----------------------------
that (i) is based on and either interfaces with or supplements BFS and (ii) is
independently developed by EI in accordance with the requirements set forth in
Section 2.8(h) of this Agreement.

         1.11 "EI Independent Subsystem" shall mean a subsystem that (i)
               ------------------------
interfaces with or supplements BFS, but does not constitute or include
Derivative Technology based on BFS or the Worldspan BFS Software, other than as
a result of the incorporation (in either original or modified form) of any
interfaces, protocols, formats, or other structural elements of BFS or the
Worldspan BFS Software that is necessary to achieve interoperability with BFS or
the Worldspan BFS Software, as applicable, and (ii) is independently developed
by EI in accordance with the requirements set forth in Section 2.8(f) of this
Agreement.

         1.12 "ETT Customer" shall mean an entity (such as an airline, other
               ------------
travel agency or other travel service provider) that has a contractual
relationship with EI entitling such entity to use the Expedia platform to sell
travel bookings by means of the Internet or similar distribution channel.

         1.13 "Expedia" shall mean the software code, informational databases,
               -------
products, and other components that make up the travel services of EI and its
Affiliates, which are marketed for use by individual end users in the United
States, Belgium, Canada, Germany, the United Kingdom and/or such other locales
as EI may elect to market its services, at its sole discretion, to enable such
end users to shop for, reserve, book and pay for certain travel products and
services (including, at a minimum, air travel, hotel accommodations, and car
rentals) via a personal computer, telephone or other interactive device. EI
currently offers such service on the Web under the names "Expedia,"
"Travelscape," "VacationSpot" and "Rent-a-Holiday," but such names may change
from time to time. The term "Expedia" as used in this Agreement shall encompass
all of the forgoing names and be deemed to refer to all future versions of the
above-described services, regardless of the name under which they are offered
from time to time, and includes without limitation any and all additional,
follow-on, successor or replacement versions of such services. For purposes of
this Agreement, "Expedia" shall also include the travel-related platform
interactive electronic products created by or for EI, which EI may license to
third parties desiring to offer travel-related services and information via
online systems under third party trademarks.

         1.14 "Feedback" shall mean suggestions, comments, ideas, information or
               --------
other feedback given by one party to the other party with respect to the other
party's computer software and confidential information.

         1.15 "Full Project Plan" shall mean the detailed project plan and
               -----------------
development schedule attached as Exhibit 1, which outlines each party's
deliverables under this

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Agreement. On at least an annual basis, the Full Project Plan will be reviewed,
revised and updated by the mutual agreement of the parties.

         1.16 "Independent Development Date" shall mean the date, if any, that
               ----------------------------
(i) is on or after the Restrictions Expiration Date, and (ii) is designated as
the Independent Development Date by the applicable party pursuant to Section
2.8(g) and/or Section 2.8(h) of this Agreement.

         1.17 "Orbitz" shall mean [*] to their respective businesses. The
               ------
following entities shall constitute [*] for purposes of this definition: (a)
[*]; or (b) [*].

         1.18 "Power Shopper" shall mean the functionality to search for
               -------------
multiple separately priced air travel itineraries for a single trip as
implemented on the Worldspan TPF-based fares and pricing system.

         1.19 "Private Functionality" shall mean Derivative Technology based on
               ---------------------
BFS that is developed by one party (a) outside of the Full Project Plan or (b)
at a more aggressive rate than is provided in the Full Project Plan.

         1.20 "Restrictions Expiration Date" shall mean, (a) if this Agreement
               ----------------------------
has not been earlier terminated pursuant to Section 5.2(a) or 5.2(d) as a result
of the default of Worldspan, the [*] the date upon which Worldspan and EI have
achieved [*]; or, (b) otherwise, the [*] of the Effective Date.

         1.21 "Travelocity" shall mean [*] to their respective businesses. [*]
               -----------
shall constitute [*] for purposes of this definition. [*].

         1.22 "Worldspan BFS Software" shall mean computer software, running on
               ----------------------
the Worldspan System, developed by Worldspan under the 1999 Development
Agreement and this Agreement that is necessary to permit BFS to search data
regarding fare and flight availability from the Worldspan System, together with
all documentation relating to such software, such as object code, source code,
functional specifications, and operating instructions. In addition to other
provisions in this Agreement, any updates to the Worldspan BFS Software provided
to EI pursuant to Section 2.2(c) shall be considered part of the Worldspan BFS
Software.

         1.23 "Worldspan Customer" shall mean (a) an airline (whether an owner
               ------------------
of Worldspan or a non-owner airline) for whom Worldspan provides air travel
inventory, pricing, or reservation services, (b) a travel agency or corporate
travel department that accesses and books travel reservations via the Worldspan
System, or (c) any other entity or person who accesses and books travel
reservations via the Worldspan System.

         1.24 "Worldspan Independent Pricing System" shall mean any computer
               ------------------------------------
software that (i) is based on and either interfaces with or supplements BFS and
(ii) is independently developed by Worldspan in accordance with the requirements
set forth in Section 2.8(g) of this Agreement.

                             -------------------------------------------------
                               [*]-CERTAIN INFORMATION ON THIS PAGE HAS BEEN
                             OMITTED AND FILED SEPARATELY WITH THE COMMISSION.
                               CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH
                                      RESPECT TO THE OMITTED PORTIONS
                             -------------------------------------------------

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         1.25 "Worldspan Independent Subsystem" shall mean a subsystem that (i)
               -------------------------------
interfaces with or supplements BFS, but does not constitute or include
Derivative Technology based on BFS or the Worldspan BFS Software, other than as
a result of the incorporation (in either original or modified form) of any
interfaces, protocols, formats, or other structural elements of BFS or the
Worldspan BFS Software that is necessary to achieve interoperability with BFS or
the Worldspan BFS Software, as applicable, and (ii) is independently developed
by Worldspan in accordance with the requirements set forth in Section 2.8(f) of
this Agreement.

         1.26 "Worldspan System" shall mean the computer hardware and operating
               ----------------
systems, software applications running thereon, and related networks and devices
comprising Worldspan's CRS.

2.       DEVELOPMENT

         2.1      EI Obligations.
                  --------------

                  (a) EI shall use commercially reasonable efforts to develop
BFS in accordance with the Full Project Plan. EI shall develop and own a
requirements document, functional specification and deployment plan for BFS, all
of which shall be reasonably acceptable to Worldspan. EI shall develop BFS to
interface with the Worldspan BFS Software as specified in the Full Project Plan.

                  (b) Throughout development and operation of the Worldspan BFS
Software, EI shall provide Worldspan with access to BFS, as reasonably necessary
for development, correction, and maintenance of the Worldspan BFS Software. EI
shall provide Worldspan with access to testing and production facilities of EI,
for purposes of development, testing, correction, and maintenance of the
Worldspan BFS Software in accordance with the Full Project Plan. EI shall
provide information and advice regarding BFS as reasonably requested by
Worldspan to assist Worldspan in its efforts to develop, correct, and maintain
the Worldspan BFS Software.

                  (c) EI will provide suitable training to Worldspan personnel
who are reasonably competent in the use of the Microsoft Windows NT operating
system in order to enable those Worldspan personnel to operate and maintain BFS.

                  (d) If the servers running BFS are located at the Worldspan
premises, then EI shall pay Worldspan the hosting costs and servicing fees
mutually agreed upon by the parties at that time, which agreement shall be a
condition to any obligation of Worldspan to locate such servers at the Worldspan
premises.

                  (e) EI will deliver a copy of the then current BFS, including
related documentation, to Worldspan upon termination of this Agreement, and upon
Worldspan's written request at any time on or after the Effective Date during
the term of this Agreement. In addition, if EI has previously delivered to
Worldspan a copy of BFS, then

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<PAGE>

EI shall thereafter deliver to Worldspan any updates EI may create to BFS during
the term of this Agreement, within a reasonable time after EI completes
development of such updates. For purposes of clarity, any EI Independent
Subsystem developed by EI pursuant to Section 2.8(f)(1) of this Agreement shall
not be considered an update to BFS, and EI shall not deliver copies of such EI
Independent Subsystem to Worldspan upon termination of this Agreement, nor at
Worldspan's request during the term of this Agreement, unless such EI
Independent Subsystem has been designated as part of BFS by mutual agreement of
the parties.

         2.2      Worldspan Obligations.
                  ---------------------

                  (a) Worldspan shall use commercially reasonable efforts to
develop the Worldspan BFS Software in accordance with the Full Project Plan.
Worldspan shall develop and own a requirements document, functional
specification and deployment plan for the Worldspan BFS Software, all of which
shall be reasonably acceptable to EI. Worldspan shall develop the Worldspan BFS
Software to interface with BFS as specified in the Full Project Plan.

                  (b) During the term of this Agreement, Worldspan shall provide
EI with access to the Worldspan BFS Software and other software running on the
Worldspan System, as reasonably necessary for development, correction, and
maintenance of BFS. Worldspan shall provide EI with access to testing and
production facilities of the Worldspan System, for purposes of development,
testing, correction, and maintenance of BFS in accordance with the Full Project
Plan. Worldspan shall provide information and advice regarding the Worldspan BFS
Software and the Worldspan System as reasonably requested by EI to assist EI in
its efforts to develop, correct, and maintain BFS.

                  (c) Worldspan will deliver a copy of the then current
Worldspan BFS Software, including related documentation, to EI upon termination
of this Agreement, and upon EI's written request at any time on or after the
Effective Date during the term of this Agreement. In addition, if Worldspan has
previously delivered to EI a copy of the Worldspan BFS Software, then Worldspan
shall thereafter deliver to EI any updates Worldspan may create to the Worldspan
BFS Software during the term of this Agreement, within a reasonable time after
Worldspan completes development of such updates. For purposes of clarity, any
Worldspan Independent Subsystem developed by Worldspan pursuant to Section
2.8(f)(2) of this Agreement, shall not be considered an update to Worldspan BFS
Software, and Worldspan shall not deliver copies of such Worldspan Independent
Subsystem to EI upon termination of this Agreement, nor at EI's request during
the term of this Agreement, unless such Worldspan Independent Subsystem has been
designated as part of the Worldspan BFS Software by mutual agreement of the
parties.

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<PAGE>

         2.3      Steering Committee.
                  ------------------

                  (a) To the extent that they have not already done so, within
thirty (30) days after the Effective Date, EI and Worldspan shall each appoint a
senior executive responsible for performance and a technical manager responsible
for development under this Agreement. The EI technical manager shall have
responsibility for the overall day-to-day management of EI's obligations
hereunder, and the Worldspan technical manager shall have responsibility for the
overall day-to-day management of Worldspan's obligations hereunder. EI and
Worldspan shall each have the right to replace their respective executives and
technical managers upon written notice to the other. EI and Worldspan agree to
make reasonable arrangements for their respective technical managers to devote
such time as is reasonably required of them to carry out their duties and
responsibilities under the Full Project Plan.

                  (b) The four (4) persons appointed in accordance with the
requirements of Section 2.3(a), and others selected by either party, shall
collectively serve as the Steering Committee charged with the overall management
and supervision of the development and deployment of BFS for Expedia. The
Steering Committee shall meet in person at least once per calendar quarter
during the term of this Agreement (and more often by phone as mutually agreed in
light of the demands of the development project), to review each party's
progress and to coordinate development and/or deployment efforts.

         2.4 Testing and Acceptance. Both parties shall establish mutually
             ----------------------
acceptable acceptance testing criteria for individual operability and the
interworking of applicable portions or versions of BFS, the Worldspan BFS
Software and the Worldspan System. Such acceptance criteria shall be consistent
with the concepts outlined in the Full Project Plan. The parties shall test BFS
and the Worldspan BFS Software, with simulated usage via Expedia and the
Worldspan System, as set forth in the Full Project Plan. If any portion or
version of BFS and the Worldspan BFS Software meet the applicable acceptance
criteria, the parties shall deploy that portion or version of BFS and the
Worldspan BFS Software, pursuant to Section 4 below.

         2.5 No Obligation/Independent Development. Nothing in this Agreement
             -------------------------------------
will be construed as restricting either party's ability to acquire, license,
develop, manufacture or distribute for itself, or have others acquire, license,
develop, manufacture or distribute for such party, similar technology performing
the same or similar functions as the technology contemplated by this Agreement,
or to market and distribute such similar technology in addition to, or in lieu
of, the technology contemplated by this Agreement; provided that such
acquisition, license, development, manufacture or distribution does not violate
the confidentiality provisions in Section 9 of this Agreement.

         2.6 Nonsolicitation and No Hire Covenants.
             -------------------------------------

                  (a) During the term of this Agreement and for one (1) year
thereafter (the "Nonsolicitation Period"), neither party (without the prior
written consent of the

                                       7
<PAGE>

other party) shall solicit (with knowledge that such solicitation is prohibited
by this Section 2.6) for employment or independent contract service any of the
other party's individual personnel directly engaged in projects hereunder. This
Section 2.6 shall not apply to a party's employees who are no longer in the
party's employ at least three (3) months prior to the time the other party
hereto solicits them. Furthermore, this Section 2.6 shall not restrict either
party from generally advertising available positions.

             (b) During the Nonsolicitation Period, (i) EI shall not hire or
engage as an independent contractor any of the Worldspan employees listed in
Section 1 of Exhibit 3 hereto, and (ii) Worldspan shall not hire or engage as an
independent contractor any of the EI employees listed in Section 2 of Exhibit 3
hereto. Each party may update its respective list of names on Exhibit 3 from
time to time with thirty (30) days prior written notice to the other party. Any
update, however, shall not increase the number of employees to more than fifteen
(15) for each party.

             (c) Both parties shall use good faith and reasonable efforts to
communicate, and will maintain consistent internal practices to communicate, the
existence and import of this Section 2.6 to applicable employees, and to resolve
in a mutually satisfactory manner any issues that may arise under this Section.

         2.7 Costs of Development. Except as set forth in Section 2.1(d), each
             --------------------
party shall be solely responsible for its own costs incurred as a result of its
performance under this Agreement.

         2.8 Development Objectives and Procedures. In connection with the
             --------------------------------------
development of BFS, the parties agree upon the following objectives and
procedures:

         (a) The parties acknowledge that one of their mutual objectives is to
[*], and the parties agree to work together in good faith to achieve that
objective.

         (b) EI will have a right of first refusal for exclusive access to alpha
and beta test periods for applicable portions or versions of BFS. EI may
exercise its right of first refusal by giving Worldspan written notice thereof
within thirty (30) days after EI is given written notice of the terms and
conditions upon which the alpha or beta test period is to be conducted. If EI
does not so exercise its right of first refusal, then Worldspan may arrange for
third parties to conduct the alpha or beta test period on such terms and
conditions.

         (c) Worldspan will not make BFS available to [*] until the [*] of (i)
[*], and (ii) [*].

         (d) Worldspan will not make BFS available to [*] at any time prior to
the [*], except with the prior written consent of EI. In addition, Worldspan
will not make BFS available to [*], and Worldspan shall not make BFS available
to [*] until the [*] (i) [*], (ii) [*], which shall be no earlier than [*], and
(iii) [*]. Worldspan may only

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<PAGE>

make BFS available to [*] under clause (ii) above for the purpose of [*] and
only upon thirty (30) days prior written notice to EI.

         (e) Each party acknowledges and agrees that either party may, at its
own cost and expense, develop Private Functionality at any time in accordance
with the following:

                  (1) The party developing the Private Functionality (the
"Developing Party") shall be solely responsible for funding the development of
the Private Functionality, using resources additional to those resources that
the Developing Party is otherwise required to devote to the development of BFS
under this Agreement, without requiring any development, additional resources,
or other contribution by the other party (the "Non-Developing Party"). All
Private Functionality shall be considered part of BFS and, accordingly, each
party shall have the rights and obligations with respect to the Private
Functionality that are otherwise provided with respect to BFS in this Agreement,
except that the parties may agree, on a case-by-case basis, to certain use
restrictions, or other special terms and conditions, with respect to a Private
Functionality.

                  (2) In the event that the parties agree to any type of use
restriction for any Private Functionality as contemplated in paragraph (1)
above, the Developing Party for that Private Functionality shall defend,
indemnify, and hold the Non-Developing Party harmless from and against, and
shall reimburse the Non-Developing Party with respect to, any and all losses,
damages, liabilities, claims, judgments, settlements, fines, costs, and expenses
(including attorneys' fees) of every nature whatsoever incurred by the
Non-Developing Party by reason of or arising out of litigation or transactions
in anticipation or avoidance of litigation in connection with any use of the
Private Functionality by the Non-Developing Party that was not restricted by the
mutual agreement of the parties. The Non-Developing Party shall provide the
Developing Party reasonably prompt notice in writing of any such litigation and
shall provide the Developing Party with reasonable information and assistance,
at the Developing Party's expense, to help the Developing Party defend such
litigation.

         (f) Each of EI and Worldspan may, by giving the other party prior
written notice thereof, elect to independently develop EI Independent Subsystems
or Worldspan Independent Subsystems, respectively, as follows:

                  (1) Each such EI Independent Subsystem shall be funded solely
by EI, using resources additional to those resources that EI is otherwise
required to devote to the development of BFS under this Agreement, without
requiring any development, additional resources, or other contribution by
Worldspan. Notwithstanding anything to the contrary in this Agreement, any such
EI Independent Subsystem shall not be considered part of BFS or the Worldspan
BFS Software for purposes of this Agreement, and Worldspan shall have no rights
therein. Further, EI in its sole discretion shall have the right, but not the
obligation, upon mutual agreement with Worldspan, to designate any EI
Independent Subsystem as part of BFS or the Worldspan BFS Software, in which
event Worldspan shall have the rights therein that are otherwise provided in
this Agreement.

                             -------------------------------------------------
                               [*]-CERTAIN INFORMATION ON THIS PAGE HAS BEEN
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                                      RESPECT TO THE OMITTED PORTIONS
                             -------------------------------------------------

                                       9
<PAGE>

                  (2) Each such Worldspan Independent Subsystem shall be funded
solely by Worldspan, using resources additional to those resources that
Worldspan is otherwise required to devote to the development of BFS under this
Agreement, without requiring any development, additional resources, or other
contribution by EI. Notwithstanding anything to the contrary in this Agreement,
any such Worldspan Independent Subsystem shall not be considered part of BFS or
the Worldspan BFS Software for purposes of this Agreement, and EI shall have no
rights therein. Further, Worldspan in its sole discretion shall have the right,
but not the obligation, upon mutual agreement with EI, to designate any
Worldspan Independent Subsystem as part of the Worldspan BFS Software or BFS, in
which event EI shall have the rights therein that are otherwise provided in this
Agreement.

         (g) In the event that [*] pursuant to this Agreement [*], then
Worldspan may, by giving EI ninety (90) days prior written notice thereof,
designate a date as the Independent Development Date ("Worldspan Notice of
Independent Development Date"). Upon the Independent Development Date, whether
designated by Worldspan or EI, EI shall deliver a then-current copy of BFS,
including source code, to Worldspan, and Worldspan may begin independent
development of the Worldspan Independent Pricing System.

                  (1) Notwithstanding anything to the contrary in this
Agreement, effective on the Independent Development Date, (i) such independent
development of the Worldspan Independent Pricing System shall be funded solely
by Worldspan, (ii) neither party shall be obligated to provide any resources or
other contributions for the joint development of BFS and the Worldspan BFS
Software, (iii) the Worldspan Independent Pricing System shall not be considered
part of BFS or the Worldspan BFS Software for purposes of this Agreement, and
(iv) EI shall have no rights in the Worldspan Independent Pricing System.
However, if and to the extent that the Worldspan Independent Pricing System
includes Derivative Technology based on BFS or the Worldspan BFS Software, then
Worldspan's rights to use such Derivative Technology as part of the Worldspan
Independent Pricing System shall be subject to the same restrictions, if any, as
then currently apply to Worldspan's rights to use the portions of BFS or the
Worldspan BFS Software, as applicable, upon which the Derivative Technology is
based.

                  (2) If the Worldspan Notice of Independent Development Date is
given [*], then, on the Independent Development Date, [*] the license amounts
for each Advanced BFS Operational Year (or portion of an Advanced BFS
Operational Year) during the period from the Independent Development Date until
the end of the [*], where the [*] for each such Advanced BFS Operational Year
(prorated on a per diem basis for any partial Advanced BFS Operational Year) is
equal to the greater of (i) [*] (as defined below), and (ii) the [*]. For
purposes of this Section, [*]. As an example of the calculation of the [*]
pursuant to this Section 2.8(g), if, as the result of a Worldspan Notice of
Independent Development Date, the Independent Development Date was at the end of
the [*] and the [*] payable under Section 4.6(a) for the six months immediately

                             -------------------------------------------------
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                             -------------------------------------------------

                                      10
<PAGE>

preceding the Independent Development Date were [*], then the [*] would be [*]
and the [*].

                  (3) In the event that Worldspan delivers the Worldspan Notice
of Independent Development, resulting in the termination of this Agreement
pursuant to Section 5.2(b), Worldspan shall continue to provide data to EI in
accordance with Section 4.4 of this Agreement.

         (h) In the event that [*] pursuant to this Agreement [*], then EI may,
by giving Worldspan ninety (90) days prior written notice thereof, designate a
date as the Independent Development Date (the "EI Notice of Independent
Development Date"). Upon the Independent Development Date, whether designated by
EI or Worldspan, EI may begin independent development of the EI Independent
Pricing System. Notwithstanding anything to the contrary in this Agreement,
effective on the Independent Development Date, (i) such independent development
of the EI Independent Pricing System shall be funded solely by EI, (ii) neither
party shall be obligated to provide any resources or other contributions for the
joint development of BFS and the Worldspan BFS Software, (iii) the EI
Independent Pricing System shall not be considered part of BFS or the Worldspan
BFS Software for purposes of this Agreement, and (iv) Worldspan shall have no
rights in the EI Independent Pricing System. However, if and to the extent that
the EI Independent Pricing System includes Derivative Technology based on BFS or
the Worldspan BFS Software, then EI's rights to use such Derivative Technology
as part of the EI Independent Pricing System shall be subject to the same
restrictions, if any, as then currently apply to EI's rights to use the portions
of BFS or the Worldspan BFS Software, as applicable, upon which the Derivative
Technology is based.

3.       OWNERSHIP AND LICENSE

         3.1 General. In general, each party shall own the intellectual property
             -------
it owns prior to the Effective Date and that which it creates in the performance
of its obligations under this Agreement, subject to the provisions set forth in
Sections 3.2 and 3.3. To be clear, EI shall own BFS, Expedia, the EI Independent
Subsystems, and the EI Independent Pricing System, and Worldspan shall own the
Worldspan BFS Software, the Worldspan System, the Worldspan Independent
Subsystems, and the Worldspan Independent Pricing System.

         3.2      Ownership of BFS.
                  ----------------

                  (a) Worldspan agrees that all copyrights in BFS shall be owned
by EI and that any Worldspan contributions to BFS shall be a "work made for
hire" for copyright purposes. Without limiting the generality of the foregoing,
Worldspan hereby assigns to EI, its successors and assigns, all of Worldspan's
rights, title, and interest in any U.S. copyrights that Worldspan may possess or
acquire in BFS and all copyrights and equivalent rights in BFS throughout the
world, including all renewals and extensions of such rights that may be secured
under the laws now or hereafter in force and effect in the United States of
America or in any other country or countries. Worldspan shall execute

                             -------------------------------------------------
                               [*]-CERTAIN INFORMATION ON THIS PAGE HAS BEEN
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                               CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH
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                             -------------------------------------------------

                                      11
<PAGE>

and deliver such instruments and take such other action as may be reasonably
requested by EI to perfect or protect EI's rights in BFS and to carry out the
assignments contemplated in this Section 3.2(a).

                  (b) Further, Worldspan hereby grants EI a nonexclusive,
royalty-free, irrevocable license to make, use, sell, and import, all only as
part of BFS or any derivatives thereof and not otherwise, any Worldspan
inventions, ideas, designs, concepts, techniques, discoveries, or improvements,
whether or not patentable, embodied in BFS at or prior to the acceptance of BFS
as provided in Section 2.4, including but not limited to all trade secrets,
utility and design patent rights and equivalent rights in and to such inventions
and designs throughout the world regardless of whether or not legal protection
for BFS is sought.

         3.3      Ownership of Worldspan BFS Software.
                  -----------------------------------

                  (a) EI agrees that all copyrights in the Worldspan BFS
Software shall be owned by Worldspan and that any EI contributions to the
Worldspan BFS Software shall be a "work made for hire" for copyright purposes.
Without limiting the generality of the foregoing, EI hereby assigns to
Worldspan, its successors and assigns, all of EI 's rights, title and interest
in any U.S. copyrights that EI may possess or acquire in the Worldspan BFS
Software and all copyrights and equivalent rights in the Worldspan BFS Software
throughout the world, including all renewals and extensions of such rights that
may be secured under the laws now or hereafter in force and effect in the United
States of America or in any other country or countries. EI shall execute and
deliver such instruments and take such other action as may be reasonably
requested by Worldspan to perfect or protect Worldspan's rights in the Worldspan
BFS Software and to carry out the assignments contemplated in this Section
3.3(a).

                  (b) Further, EI hereby grants Worldspan a nonexclusive,
royalty-free, irrevocable license to make, use, sell, and import, all only as
part of the Worldspan BFS Software or any derivatives thereof and not otherwise,
any EI inventions, ideas, designs, concepts, techniques, discoveries, or
improvements, whether or not patentable, embodied in the Worldspan BFS Software
at or prior to the acceptance of the Worldspan BFS Software as provided in
Section 2.4, including but not limited to all trade secrets, utility and design
patent rights and equivalent rights in and to such inventions and designs
throughout the world regardless of whether or not legal protection for Worldspan
BFS Software is sought.

         3.4      License as to BFS.
                  -----------------

                  (a) EI hereby grants Worldspan a perpetual, nonexclusive,
worldwide, irrevocable license, effective as of the Effective Date, to make,
use, reproduce, modify, adapt, translate, create Derivative Technology based on,
sublicense, rent, lease, transmit or otherwise distribute (directly or
indirectly) BFS in source and object code form. Notwithstanding the foregoing,
prior to the Restrictions Expiration Date, but not thereafter, (i) Worldspan's
rights to make, use reproduce, modify, adapt, translate, or

                                      12
<PAGE>

create Derivative Technology based on BFS in source and object code form BFS, or
any Derivative Technology based thereon, shall be limited to doing so in
connection with the operation of the Worldspan System to provide services for
Worldspan Customers, and (ii) Worldspan's rights to sublicense, rent, lease,
transmit or otherwise distribute (directly or indirectly) BFS, or any Derivative
Technology based thereon, shall be subject to Section 3.4(d) below.

                  (b) Except with respect to Expedia and ETT Customers for whom
EI has agreed to deliver BFS functionality, Worldspan shall be solely
responsible for the conversion, support and maintenance of BFS and the Worldspan
BFS Software as used in the Worldspan System.

                  (c) Prior to the Restrictions Expiration Date, but not
thereafter, EI shall have [*] except upon thirty (30) days prior written notice
to Worldspan of EI's request and upon Worldspan's prior written consent, which
will not be unreasonably withheld. For purposes of clarity, Worldspan may
reasonably withhold its consent to [*]. Following the Restrictions Expiration
Date, EI shall have [*].

                  (d) Prior to the Restrictions Expiration Date, but not
thereafter, Worldspan shall [*] except upon thirty (30) days prior written
notice to EI of Worldspan's request and upon EI's prior written consent, which
will not be unreasonably withheld; provided, however, that Worldspan may [*],
but only in instances where the agreement pursuant to which [*]. Each such [*]
shall be subject to a [*]. For purposes of clarity, EI may reasonably withhold
its consent to [*]. Following the Restrictions Expiration Date, Worldspan shall
have [*].

         3.5      License as to Worldspan BFS Software.
                  ------------------------------------

                  (a) Worldspan hereby grants EI a perpetual, nonexclusive,
worldwide, irrevocable license, effective as of the Effective Date, to make,
use, reproduce, modify, adapt, create Derivative Technology based on, translate,
distribute (directly and indirectly), transmit, license, rent, and lease the
Worldspan BFS Software in source and object code form. Notwithstanding the
foregoing, prior to the Restrictions Expiration Date, but not thereafter, EI may
not transfer or assign the Worldspan BFS Software without thirty (30) days prior
written notice to Worldspan of EI's intention to transfer or assign the
Worldspan BFS Software and then only with Worldspan's prior written consent to
such transfer or assignment.

         (b) Subject to the provisions of Section 3.5(a), EI shall have [*],
including the right to [*]. Worldspan acknowledges that EI may sublicense the
[*] to other companies [*].

         3.6 Joint Patent Procurement. Any inventions shall be owned by the
             ------------------------
party or parties whose employees or independent contractors are inventors
thereof. In the event both EI and Worldspan have employees or independent
contractors who are inventors of

                             -------------------------------------------------
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                                      13
<PAGE>

an invention arising out of the development contemplated hereunder (a "Joint
Invention"), the following procedure shall apply:

                  (a) EI shall have the primary responsibility to prepare, file,
and prosecute all patent applications in both the USA and foreign countries for
Joint Inventions. If and to the extent that EI elects not to do so, then
Worldspan may prepare, file, and prosecute such patent applications. The parties
shall cooperate in making decisions on the filing and prosecution of patent
applications for Joint Inventions, and, when possible, shall mutually consent to
the filing and prosecution of such patent applications, such consent not to be
unreasonably withheld. However, consent of one party is not required for the
other party to proceed with the preparation, filing and prosecution of such
patent applications.

                  (b) All costs associated with the preparation, filing,
prosecution and maintenance of patent applications and patents for Joint
Inventions shall be borne equally by the parties; provided, however, that either
party may, at any time and by giving the other party written notice thereof,
elect not to contribute, or continue to contribute, its share of such costs with
respect to any patent application or patent for any applicable country or
region. In the event that a party elects not to contribute, or continue to
contribute, its share of such costs for any such patent application or patent
for any applicable country or region, then that party, and its employees or
contractors designated as inventors or contributors, agree to assign, and by
this Agreement, hereby assign all right, title and interest in and to such
patent application or patent to the party filing and paying for such patent
application or patent. In such event, the nonpaying party and its employees or
contractors further agree to execute any additional documents presented to them
by the filing and paying party which may be necessary to perfect title to any
such patent application or patent.

                  (c) In the event that patent protection is sought for Joint
Inventions, both parties agree to cooperate fully and promptly during the term
of and after expiration or termination of this Agreement in the filing and
prosecution of any patent applications in the USA and foreign countries. Both
parties shall promptly execute and deliver such instruments and documents and
take such other action as may be necessary, during the term of and after
expiration or termination of this Agreement, to secure and maintain all such
rights in such patents in any and all countries. Each party shall ensure that
each of its employees and contractors involved in the development contemplated
hereunder is contractually obligated to assign to the party all patent rights
that such employee or contractor may obtain pursuant to such development.

                  (d) If a party desires to sue a third party for infringement
of any patent for Joint Inventions, such party shall consult with the other
party prior to filing any such suit.

                  (e) Unless a nonpaying party assigns its rights to the filing
and paying party pursuant to Section 3.6(b) above, the parties shall have an
undivided, joint ownership interest in any patents for any Joint Inventions.
Neither party shall be

                                      14
<PAGE>

obligated to pay the other any royalties or other consideration, nor account to
the other for any royalties or other consideration it may receive, for any use,
licenses, assignment, sale, lease or other grant of such patents.

4.       DEPLOYMENT

         4.1 EI. EI may deploy BFS, or any portion or version thereof, on
             --
Expedia at any time, in EI's sole discretion. The parties acknowledge that EI
has already deployed BFS on Expedia.

         4.2      Worldspan.
                  ---------

                  (a) During the term of this Agreement and for so long
thereafter as EI continues to use Worldspan as a CRS for Expedia pursuant to the
CRS Agreement, Worldspan shall maintain the related Worldspan BFS Software on
the Worldspan System for use by EI and/or its ETT Customers in connection with
Expedia for applicable air bookings via the Worldspan System. Throughout
deployment and for so long thereafter as EI continues to use Worldspan as a CRS
for Expedia pursuant to the CRS Agreement, Worldspan shall use commercially
reasonable efforts to correct any errors in the Worldspan BFS Software, or the
Worldspan System with respect to the operation of BFS, in accordance with the
performance standards set forth in Exhibit 2. In the event the parties provide
for a reduction in capacity under the terms of the CRS Agreement and BFS and/or
the Worldspan BFS Software fails within two (2) months thereafter, EI may switch
routing of Expedia search requests to Power Shopper or Power Availability
searches on the Worldspan System in accordance with the capacity requirements
provided immediately prior to the most recent such reduction of capacity, as set
forth in the CRS Agreement. If such failure occurs more than two (2) months
after such a reduction in capacity, then Worldspan shall use reasonable business
efforts to make capacity available to EI at the level provided immediately prior
to such reduction, in accordance with the CRS Agreement.

                  (b) Worldspan shall have the right to deploy BFS, or any
portion thereof, in connection with the operation of the Worldspan System as
contemplated by Section 3.4.

         4.3 Debit Memos. If any travel provider issues a debit memo with
             -----------
respect to an error in customer charges arising out of BFS or the Worldspan BFS
Software running on the Worldspan System, Worldspan shall investigate the
alleged error and make the initial response to the travel provider. EI shall
have the right to investigate the alleged error upon request. If the error
occurs in connection with a transaction initiated through Expedia or by an ETT
Customer using the Expedia platform for such transaction, EI shall pay the debit
memo. If the error occurs in connection with a transaction initiated by
Worldspan or a Worldspan Customer using the Worldspan platform for such
transaction, Worldspan shall pay the debit memo.

                                      15
<PAGE>

         4.4 Data.
             ----

         (a) Except as provided in subsection (b) below, as of the Effective
Date and for so long as EI continues to use Worldspan as a CRS for Expedia
pursuant to the CRS Agreement, Worldspan shall via the Worldspan BFS Software on
the Worldspan CRS [*] and (ii) to the extent that it is not contractually
prohibited from doing so, [*]. If and to the extent that Worldspan's providing
EI with access to any of the foregoing data or associated support therefor [*].
EI and Worldspan agree to work together in good faith to develop procedures for
such data [*].

         (b) In the event that [*] as part of the Worldspan System and for so
long as EI continues to use Worldspan as a CRS for Expedia pursuant to the CRS
Agreement, in the event that Worldspan [*] in connection with providing access
to any of the foregoing data as provided in subsection (a) above, [*], or (ii)
[*].

         (c) Notwithstanding anything to the contrary, none of the data to which
Worldspan provides access hereunder shall, except with the prior written consent
of Worldspan, be used by EI in connection with any bookings that are not
processed on Worldspan's CRS.

         4.5 CRS for Expedia. For purposes of this Agreement, EI shall be deemed
             ---------------
to "continue to use Worldspan as a CRS for Expedia pursuant to the CRS
Agreement" for so long as EI uses Worldspan as a CRS for Expedia for U.S. point
of sale, whether or not any ETT Customers use Worldspan as a CRS.

         4.6 [*].

         (a) During the [*], within [*] of each Advanced BFS Operational Year
and subject to the provisions of Section 4.6(c) below, [*] as determined in
accordance with the following:
         [*]
================================================================================
                    ------------------------------------------------------------
                    ------------------------------------------------------------
================================================================================
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
================================================================================

         (b) In addition to [*] set forth in Section 4.6(a) above and subject to
the provisions of Section 4.6(c) below, [*] the amount, if any, by which (i)
[*]. The [*] for each Advanced BFS Operational Year [*] in the following chart:
[*]

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                                      16
<PAGE>

  ===========================================================================
                Advanced BFS                                [*]
              Operational Year
  ===========================================================================
                    [*]                                     [*]
  ---------------------------------------------------------------------------
                    [*]                                     [*]
  ---------------------------------------------------------------------------
                    [*]                                     [*]
  ---------------------------------------------------------------------------
                    [*]                                     [*]
  ---------------------------------------------------------------------------
                    [*]                                     [*]
  ---------------------------------------------------------------------------
                    [*]                                     [*]
  ===========================================================================

         (c) Notwithstanding the foregoing provisions of this Section 4.6, [*]
pursuant to subsections (a) and (b) of this Section 4.6 [*].

         (d) In order to illustrate the application of the foregoing provisions
of this Section 4.6, the following is an example of the amounts that could be
payable pursuant to this Section 4.6 [*]:

<TABLE>
<CAPTION>
===========================================================================================================
                          [*]                   [*]                    [*]                    [*]
    Quarter          under 4.6(a)           under 4.6(b)          under 4.6(c)             under 4.6
===========================================================================================================
<S>                    <C>                      <C>                    <C>                    <C>
     [*]               [*]                      [*]                    [*]                    [*]
-----------------------------------------------------------------------------------------------------------
     [*]               [*]                      [*]                    [*]                    [*]
-----------------------------------------------------------------------------------------------------------
     [*]               [*]                      [*]                    [*]                    [*]
-----------------------------------------------------------------------------------------------------------
     [*]               [*]                      [*]                    [*]                    [*]
===========================================================================================================
</TABLE>

[*]

5.       TERM AND TERMINATION

         5.1   Term. The term of this Agreement shall commence on the Effective
               ----
Date and, unless terminated earlier as provided herein, shall continue for ten
(10) years after the Effective Date of this Agreement.

         5.2   Termination.
               -----------

               (a) In the event either party materially fails to perform or
comply with this Agreement or any provision thereof, and fails to remedy the
default within thirty (30) days after the receipt of written notice to that
effect, then the other party shall have the right, at its sole option and upon
written notice to the defaulting party, to terminate this Agreement upon written
notice.

               (b) In the event that either party gives the other a notice
designating an Independent Development Date pursuant to Section 2.8(g) or
Section 2.8(h), as applicable, then this Agreement shall terminate as of the
Independent Development Date designated in such notice, provided that any such
Independent Development Date shall be no earlier than the Restrictions
Expiration Date.

                             -------------------------------------------------
                               [*]-CERTAIN INFORMATION ON THIS PAGE HAS BEEN
                             OMITTED AND FILED SEPARATELY WITH THE COMMISSION.
                               CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH
                                      RESPECT TO THE OMITTED PORTIONS
                             -------------------------------------------------

                                      17
<PAGE>

                  (c) At quarterly review meetings under Section 2.3(b) above,
if by mutual consent, it is decided further progress towards implementation of
the Full Project Plan is either technically or financially not feasible, the
parties may mutually terminate this Agreement upon written agreement.

                  (d) In the event that the CRS Agreement is terminated for any
reason, then this Agreement shall automatically terminate contemporaneously
therewith without further notice.

                  (e) Worldspan may, at any time, terminate this Agreement for
its convenience and without cause by giving EI written notice thereof. In the
event that Worldspan terminates this Agreement pursuant to this Section 5.2(e),
then, notwithstanding anything in this Agreement to the contrary, (i) Worldspan
shall not have a license or any other rights in or to BFS, (ii) EI shall not be
required to provide to Worldspan a copy of BFS or any updates thereto, (iii)
Worldspan shall not have the right to deploy BFS, or any portion thereof, in
connection with the operation of the Worldspan System, except in support of EI
or any ETT Customers using Worldspan as a CRS, and (iv) Worldspan shall not be
required to provide any resources or other contributions for the development of
BFS or to pay any additional amounts pursuant to Section 4.6.

                  (f) Any notice of default hereunder shall be prominently
labeled "NOTICE OF DEFAULT," and (i) if to EI, shall be copied to EI's General
Counsel, and (ii) if to Worldspan, shall be copied to Worldspan's General
Counsel. The rights and remedies provided in this Section shall not be exclusive
and are in addition to any other rights and remedies provided by law or this
Agreement.

         5.3 Survival. The following provisions shall survive termination or
             --------
expiration of this Agreement: Sections 2.6, 2.7, 2.8(c), 2.8(d), 2.8(e), 2.8(f),
2.8(g), 2.8(h), 4.2, 4.4, 4.6, and 5.3, Article 3, and Articles 6 through 10.
Sections 2.1(b) and 2.2(b) shall survive termination of this Agreement for the
remainder of the term of the CRS Agreement, but only with respect to BFS and the
Worldspan BFS Software developed at the time of termination of this Agreement.

         5.4 Further Deployment. The parties anticipate that they may agree to
             ------------------
continue development and/or expand deployment of BFS after the expiration of
this Agreement. However, such continued efforts shall require the separate
written agreement of the parties.

6.       REPRESENTATIONS AND WARRANTIES

Each party hereby represents and warrants as follows:

         6.1 Corporate Power. Such party is duly organized and validly existing
             ---------------
under the laws of the state of its organization and has full power and authority
to enter into this Agreement and to carry out the provisions hereof.

                                      18
<PAGE>

         6.2 Due Authorization. Such party is duly authorized to execute and
             -----------------
deliver this Agreement and to perform its obligations hereunder.

         6.3 Binding Agreement. This Agreement is a legal and valid obligation
             -----------------
binding upon such party and is enforceable against such party in accordance with
its terms. The execution, delivery and performance of this Agreement by such
party does not conflict with any agreement, instrument or understanding, oral or
written, to which it is a party or by which it may be bound, nor violate any law
or regulation of any court, governmental body or administrative or other agency
having jurisdiction over it.

         6.4 Intellectual Property.
             ---------------------

             (a) EI represents and warrants that BFS, excluding any Feedback
provided by Worldspan, does not infringe any copyright or misappropriate any
trade secret of any third party.

             (b) Worldspan represents and warrants that the Worldspan BFS
Software, excluding any Feedback provided by EI, does not infringe any copyright
or misappropriate any trade secret of any third party.

7.       LIMITATION OF WARRANTY

EXCEPT AS EXPRESSLY WARRANTED IN SECTION 6 ABOVE, EACH PARTY EXPRESSLY DISCLAIMS
ANY FURTHER WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.

8.       INDEMNIFICATION AND LIMITATION OF LIABILITY

         8.1 Indemnification by Worldspan. Worldspan shall, at its expense and
             ----------------------------
EI's request, defend any third-party claim or action brought against EI, and
EI's Affiliates, directors, officers, employees, licensees, agents and
independent contractors, (i) relating to the Worldspan System or the marketing
thereof, and (ii) to the extent it is based upon a claim that, if true, would
constitute a breach of a Worldspan warranty, representation or covenant set
forth in this Agreement (collectively, "Worldspan Claims"), and Worldspan shall
indemnify and hold EI harmless from and against any costs, damages and fees
reasonably incurred by EI, including but not limited to fees of attorneys and
other professionals, that are attributable to such Worldspan Claims. EI shall
provide Worldspan reasonably prompt notice in writing of any such Worldspan
Claims and provide Worldspan with reasonable information and assistance, at
Worldspan's expense, to help Worldspan defend such Worldspan Claims.

         8.2 Indemnification by EI. EI shall, at its expense and Worldspan's
             ---------------------
request, defend any third-party claim or action brought against Worldspan, and
its Affiliates, directors, officers, employees, licensees, agents and
independent contractors, (i) relating to Expedia or the marketing thereof, and
(ii) to the extent it is based upon a claim that, if

                                      19
<PAGE>

true, would constitute a breach of a EI warranty, representation or covenant set
forth in this Agreement (collectively, "EI Claims"), and EI shall indemnify and
hold Worldspan harmless from and against any costs, damages and fees reasonably
incurred by Worldspan, including but not limited to fees of attorneys and other
professionals, that are attributable to such EI Claims. Worldspan shall provide
EI reasonably prompt notice in writing of any such EI Claims and provide EI with
reasonable information and assistance, at EI's expense, to help EI defend such
EI Claims.

         8.3  Limitation of Liability. BOTH PARTIES AGREE THAT NEITHER PARTY
              -----------------------
WILL BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
(INCLUDING BUT NOT LIMITED TO SUCH DAMAGES ARISING FROM BREACH OF CONTRACT OR
WARRANTY OR FROM NEGLIGENCE OR STRICT LIABILITY), OR FOR INTERRUPTED
COMMUNICATIONS, LOST BUSINESS, LOST DATA OR LOST PROFITS, ARISING OUT OF OR IN
CONNECTION WITH THIS AGREEMENT, EVEN IF SUCH PARTY HAS BEEN ADVISED OF (OR KNOWS
OR SHOULD KNOW OF) THE POSSIBILITY OF SUCH DAMAGES. EXCEPT FOR CLAIMS ARISING
FROM BREACH OF THE LICENSES GRANTED HEREUNDER OR BREACH OF NONDISCLOSURE
OBLIGATIONS, UNDER NO CIRCUMSTANCES SHALL EITHER PARTY BE LIABLE TO THE OTHER OR
ANY THIRD PARTY FOR AN AMOUNT GREATER THAN ONE MILLION DOLLARS (US$1,000,000).

9.       CONFIDENTIALITY; MEDIA COMMUNICATIONS

         9.1  NDA. EI and Worldspan agree that the terms of the Nondisclosure
              ---
Agreement between EI and Worldspan dated as of the date hereof shall be deemed
incorporated herein (including without limitation the provisions regarding use
of "residuals" as described therein). Further, all terms and conditions of this
Agreement shall be deemed Confidential Information as defined therein. The
parties hereby agree to extend the term of such Nondisclosure Agreement during
the term of this Agreement and for three years thereafter.

         9.2  Press Release. EI and Worldspan agree that any press release or
              -------------
communication to the press and/or public regarding this Agreement and the
parties' relationship shall be made only after prior consultation with and
approval of the other party.

10.      GENERAL

         10.1 Governing Law; Venue; Attorneys Fees. This Agreement shall be
              ------------------------------------
construed and controlled by the laws of the State of Washington, and each party
further consents to jurisdiction by the state and federal courts sitting in the
State of Washington. Process may be served on either party by U.S. Mail, postage
prepaid, certified or registered, return receipt requested, or by such other
method as is authorized by law. If either EI or Worldspan employs attorneys to
enforce any rights arising out of or relating

                                      20
<PAGE>

to this Agreement, the prevailing party shall be entitled to recover reasonable
attorneys' fees and costs, including expert witness fees.

         10.2 Force Majeure. If the performance of this Agreement or any
              -------------
obligation hereunder is prevented, restricted or interfered with by any act or
condition whatsoever beyond the reasonable control of the affected party, the
party so affected, upon giving prompt notice to the other party, shall be
excused from such performance, except for the making of payments hereunder, to
the extent of such prevention, restriction or interference.

         10.3 Notices; Requests. All notices and requests in connection with
              -----------------
this Agreement shall be deemed given as of the day they are (i) deposited in the
U.S. mails, postage prepaid, certified or registered, return receipt requested;
or (ii) sent by overnight courier, charges prepaid, with a confirming fax; and
addressed as follows:

         Worldspan:         Worldspan, L.P.
                            300 Galleria Parkway, N.W.
                            Atlanta, Georgia  30339

                            Attention:       Senior Vice President and General
                                              Manager- Worldwide E-Commerce
                            Fax:             (770) 563-7003
                            Phone:           (770) 563-6987

          with a cc to:     Worldspan, L.P.
                            300 Galleria Parkway, N.W.
                            Atlanta, Georgia  30339

                            Attention:       General Counsel
                            Fax:             (770) 563-7878

         EI:                Expedia, Inc.

                            13810 SE Eastgate Way, Suite 400
                            Bellevue, WA  98005

                            Attention:       Sr. Vice President,
                                             Transportation and Core
                                             Development
                            Fax:             (425) 564-7321
                            Phone:           (425) 564-7200

           with a cc to:    Expedia, Inc.
                            13810 SE Eastgate Way, Suite 400
                            Bellevue, WA  98005

                            Attention:       General Counsel
                            Fax:             (425) 564-7251

                                      21
<PAGE>

or to such other address as the party to receive the notice or request so
designates by written notice to the other.

         10.4 Assignment. Neither party may assign its interest in this
              ----------
Agreement; provided, however, that either party may assign this Agreement upon
thirty (30) days prior written notice to a wholly-owned subsidiary or to an
entity to which substantially all the assets of the assigning party are being
transferred if such assignee assumes and agrees to perform all the obligations
of the assignor. This Agreement shall be binding upon the parties hereto and
their successors and permitted assigns and all persons claiming under or through
them or any such successor or permitted assign.

         10.5 Severability. In the event that any provision of this Agreement is
              ------------
found invalid or unenforceable pursuant to judicial decree or decision, the
remainder of this Agreement shall remain valid and enforceable according to its
terms. The parties intend that the provisions of this Agreement be enforced to
the fullest extent permitted by applicable law. Accordingly, the parties agree
that if any provisions are deemed not enforceable, they shall be deemed modified
to the extent necessary to make them enforceable.

         10.6 Entire Agreement; Modification; No Offer. The parties hereto agree
              ----------------------------------------
that this Agreement (including the Exhibits attached hereto and referred to
herein, each of which is hereby incorporated into this Agreement for all
purposes), the CRS Agreement, and the Non-Disclosure Agreement referenced in
Section 9.1 constitute the entire agreement between the parties with respect to
the subject matter hereof and merges all prior and contemporaneous
communications, including the 1999 Development Agreement. This Agreement shall
not be modified except by a written agreement dated subsequent hereto signed on
behalf of Worldspan and EI by their duly authorized representatives. Neither
this Agreement nor any written or oral statements related hereto constitute an
offer, and this Agreement shall not be legally binding until executed by both
parties hereto.

         10.7 Binding Effect. Subject to the limitations herein before
              --------------
expressed, this Agreement will inure to the benefit of and be binding upon the
parties, their successors, administrators, heirs, and permitted assigns.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed
as of the dates indicated below.

EXPEDIA, INC.                               WORLDSPAN, L.P.

/s/ Byron Bishop                            /s/ Sue Powers
-----------------------------               ------------------------------------
By (sign)                                   By (sign)

Byron Bishop                                Sue Powers
-----------------------------               ------------------------------------
Name (Print)                                Name (Print)

Sr. Vice President                          Senior Vice President & General
-----------------------------                Manager Worldwide e-Commerce
Title                                       ------------------------------------
                                            Title
July 5, 01
-----------------------------               June 29, 2001
Date                                        ------------------------------------
                                            Date

                                      22
<PAGE>

                                    Exhibit 1

                                Full Project Plan

[*]

                             -------------------------------------------------
                               [*]-TWELVE PAGES HAVE BEEN OMITTED AND FILED
                               SEPARATELY WITH THE COMMISSION. CONFIDENTIAL
                              TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE
                                                OMITTED PAGES
                             -------------------------------------------------

                                     1 - 1
<PAGE>

                                    Exhibit 2

                              Performance Standards

Response varies according to severity of problems:

         Severity 0:       [*]
                           Required response:  [*].

         Severity 1:       [*]
                           Required response:  [*].

         Severity 2:       [*]
                           Required response:  [*].

         Severity 3:       [*]
                           Required response:  [*].

         Severity 4:       [*].
                           Required response:  [*].

                             -------------------------------------------------
                               [*]-CERTAIN INFORMATION ON THIS PAGE HAS BEEN
                             OMITTED AND FILED SEPARATELY WITH THE COMMISSION.
                               CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH
                                      RESPECT TO THE OMITTED PORTIONS
                             -------------------------------------------------

                                     2 - 1
<PAGE>

                                    Exhibit 3

                     Employees Covered by Non-Hire Provision

1.       Worldspan Employees.

[*]

2.       EI Employees.

[*]

                             -------------------------------------------------
                               [*]-CERTAIN INFORMATION ON THIS PAGE HAS BEEN
                             OMITTED AND FILED SEPARATELY WITH THE COMMISSION.
                               CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH
                                      RESPECT TO THE OMITTED PORTIONS
                             -------------------------------------------------

                                     3 - 1

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