Document:

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR CERTAIN
           PORTIONS OF THIS DOCUMENT. CONFIDENTIAL PORTIONS HAVE BEEN
               FILED WITH THE SECURITIES AND EXCHANGE COMMISSION.

                      AIRLINE PARTICIPATION AGREEMENT

           THIS AGREEMENT (this "Agreement"), dated as of November 17, 1999,
 is by and between priceline.com Incorporated, a Delaware corporation
 ("Priceline"), and US Airways, Inc., a Delaware corporation ("US Airways").

                           PRELIMINARY STATEMENT

           Priceline provides a service that allows consumers to purchase
 airline tickets at an offer price determined by the consumer (the
 "Priceline Service").  The consumer identifies the departure and return
 dates for travel and the price the consumer is willing to pay for the
 airline ticket(s).  Priceline then determines if it is able to fulfill the
 customer's offer and, if it is able to do so, Priceline issues a ticket to
 the customer on the applicable carrier.

           US Airways desires to participate in the Priceline Service and,
 in connection therewith, will provide Priceline with unpublished fares
 subject to the Restrictions (defined herein) for select origin and
 destination city pairs (each, an "O&D") identified by US Airways in
 accordance with the terms and conditions set forth in this Agreement.

           Priceline desires to include US Airways as a participating
 carrier in the Priceline Service and to have access to such unpublished
 fares in accordance with the terms and conditions set forth in this
 Agreement.

           NOW, THEREFORE, in consideration of the covenants and agreements
 set forth in this Agreement, the parties agree as follows:

 I.   Delta Airlines Consent to US Airways participation:

      US Airways acknowledges Priceline's pre-existing agreement with Delta
      Air Lines, Inc. ("Delta") granting Delta the right to approve and/or
      limit additional airline participation in the Priceline Service.
      Priceline represents that it has obtained permission from Delta
      consenting to US Airways' ' participation in the Priceline Service
      upon the condition that Priceline limit US Airways' participation as
      provided in Section V of this Agreement.  Priceline acknowledges the
      desire and preference of US Airways to participate in the Priceline
      Service without restriction.  This Agreement in its entirety
      supersedes any previous participation agreement between Priceline and
      USAirways.

 II.  Ticket Restrictions and Related Matters

      US Airways shall make available unpublished fares to Priceline for
      O&Ds identified by US Airways in accordance with the terms and
      conditions set forth in this Agreement.  Unpublished fares provided to
      Priceline must be issued in accordance with rules and restrictions
      provided to Priceline from time to time.  By way of example,
      unpublished fares on certain O&Ds may require specific routings or be
      flight/day specific.  At all times during the term of this Agreement,
      US Airways will control and determine the unpublished fares and levels
      of inventory provided to Priceline.  It is expressly understood and
      agreed that US Airways makes no commitment whatsoever regarding the
      level of inventory, number of O&Ds or the level of unpublished fares
      that will be provided to Priceline.

      All tickets issued by Priceline for carriage on US Airways (each, a
      "Priceline Ticket") shall be subject to the following restrictions
      (the "Restrictions"):

           Except as otherwise provided in this Agreement, all Priceline
      Tickets will be non-refundable, non-endorsable and non-changeable;

           All travel will be round-trip with no stopovers or open-jaw
      travel permitted;

           Frequent Flyer  mileage and upgrades will not be permitted;
      provided, US Airways may offer such benefits to the extent that it is
      impractical to impose such frequent flyer restrictions on Priceline
      Tickets;

           Priceline customers must agree to (i) make at least one stop or
      connection on both their departing and return flights, (ii) accept a
      ticket on any Participating Carrier, and (iii) travel on any flight on
      the specified date of travel (x) for domestic U.S. flights, departing
      during the 6 a.m.   10 p.m. time period unless the customer has
      specified a request to include flights departing outside those
      periods, and (y) for international flights, at any time (i.e., 12:01
      a.m. to 11:59 p.m.);

           All Priceline travel reservations and bookings shall be made
      without Priceline customers specifying a preferred (or requested)
      carrier, flight or time of day travel preference(s) on the specified
      date(s) of travel;

           All Priceline Tickets require instant ticketing guaranteed with a
      major credit card if Priceline is able to provide an airline ticket
      within the customer's requested price, departure and return date
      parameters;

           Priceline Ticket reservations are limited to no more than eight
      persons traveling in the same itinerary; and

           Except as otherwise provided herein, in any seven-day calendar
      period, a Priceline customer shall be limited to making one offer
      price for airline ticket(s) for a Trip.  A "Trip" is defined as travel
      between the same airports on the same dates of travel.  A Priceline
      customer may, within a seven-calendar day period, make an offer for
      travel in a different airport pair or on different dates of travel.
      Priceline will not knowingly sell a ticket to a Priceline customer in
      response to a second (or subsequent) offer for a Trip within a seven
      calendar day period; provided, that Priceline may sell a ticket in
      connection with a second offer if the Priceline customer (i) accepts,
      as part of the second offer, (x) a travel package which includes a
      hotel or rental car offer, or (y) a product or service co-marketed by
      Priceline such as a credit card or long distance telephone service or
      other co-marketing program.

           US Airways may include, in addition to the Restrictions, other
      fare rules and conditions for Priceline Tickets issued on US Airways
      such as advance purchase or Saturday night stay requirements.
      Priceline also reserves the right to impose additional restrictions on
      Priceline Tickets, including a Saturday night stay requirement, as
      part of the Restrictions.

           The Restrictions will be communicated by Priceline to the
      customer via the Internet (or through Priceline's customer service
      representatives if the consumer contacts Priceline through its toll-
      free customer service number), and will be set forth on ticketing
      and/or itinerary documentation issued by Priceline.

           All Priceline Tickets issued for carriage on US Airways shall be
      subject to the published conditions of carriage and the fare rules of
      US Airways, to the extent such conditions and fare rules are

      consistent with the Restrictions.  US Airways will honor all Priceline
      Tickets issued for travel on US Airways in accordance with the
      Restrictions and other rules and conditions established by US Airways
      for Priceline Tickets.

 III. Priceline Ticket Reservations, Bookings, Payment and Fulfillment

           1.   US Airways will file unpublished fares and rules for
 Priceline Tickets with the computer reservation system ("CRS") used by
 Priceline.

           2.   Subject to Article VI, Priceline will determine the price at
 which tickets are sold based on customer offers received through the
 Priceline Service.  Priceline shall not advertise prices or fares offered
 by any carrier that are below US Airways' published or unpublished fares.

           3.   All unpublished fares made available by US Airways for sale
 through the Priceline Service shall not be commissionable and shall be
 inclusive, where applicable, of the applicable domestic federal
 transportation excise tax.  All such unpublished fares shall be exclusive
 of any domestic federal segment taxes, and any domestic or international
 fuel, departure, arrival, passenger facility, airport, terminal and/or
 security taxes or surcharges which, when applicable, must be added to the
 fare amount collected from the passenger and shown on the Priceline Ticket.

           4.   Upon locating an unpublished fare satisfying a Priceline
 customer's ticket request, Priceline shall immediately ticket the
 customer's ticket price against a valid credit card provided by the
 Priceline customer.

           5.   In all Priceline Ticket transactions, Priceline will be the
 merchant of record and will pay all associated merchant credit card fees.
 All Priceline tickets sold on US Airways will be settled through US Airways
 Reporting Corporation ("ARC").

           6.   All tickets of US Airways issued through the Priceline
 Service will be issued by Priceline using Agency ARC:  07-50854-6.  In
 collecting payment for Priceline Tickets, Priceline will act as the agent
 of US Airways pursuant to Agent's ARC Agent Reporting Agreement with ARC.

           7.   Unless otherwise directed by a Priceline customer, all
 Priceline Tickets issued on US Airways will be issued electronically.
 After issuance, Priceline will promptly forward to the customer a receipt
 of proof of purchase, contract of carriage on US Airways and a copy of the
 Restrictions (including any additional restrictions imposed by US Airways).
 In the event a Priceline customer requests US Airways to provide a separate
 electronic ticket receipt for an electronic ticket, the price shown on US
 Airways' receipt will reflect that such ticket is a "bulk" electronic
 ticket.

           8.   Priceline will encourage its customers to accept  electronic
 ticketing for all Priceline Ticket requests by imposing an additional
 charge for the issuance of paper tickets and maintaining the issuance of
 electronic tickets as the default option on the Priceline Service.

           9.   Subject to the provisions of Article II above, all Priceline
 paper tickets for carriage on US Airways will be issued by Priceline on
 standard ARC traffic documents and will be validated with US Airways'
 validation in accordance with the ARC requirements.  The passenger coupon
 will show "bulk" for the fare amount and will include all additional
 collections noted in Article II above.  The auditor's coupon will show the
 US Airways' unpublished fare as authorized by Priceline.

           10.  In the event that Priceline is unable to fulfill a Priceline
 ticket request from unpublished fares and seat inventory provided from US
 Airways participation in the Priceline Service, Priceline reserves the
 right to sell tickets on US Airways using published fares used by travel
 agents generally as reflected in CRSs, in accordance with the rules and
 conditions associated with such fares.

           11.  US Airways agrees to test special fares in Priceline at [**]%
 to [**]% off any retail fare available for sale by the travel agency
 community.  However, US Airways retains the right to increase, decrease or
 eliminate the discount in any and all markets throughout the life of this
 Agreement.  In addition, US Airways will from time to time, and at its own
 discretion, provide Priceline with discounts and special fares that are not
 generally available through traditional retail distribution channels.

           12.  Priceline may use fares provided to the Priceline Service
 for promotional purposes on specific terms as agreed to by US Airways as
 long as the actual fares offered are not made public and US Airways is not
 featured more prominently or frequently than any other participant.  In
 addition, US Airways will from time to time, at its discretion, provide
 Priceline with specific offers to promote customer use of the Priceline
 Service.

           When notifying passengers that their bids were unsuccessful
 through the Priceline Service, Priceline will offer such passengers a "hot
 link" to US Airways' branded reservation home page (USAirways.com) as an
 alternative source for air fares and tickets.  Priceline agrees to present
 US Airways, among potential multiple airline links, in an unbiased manner.
 Priceline will work to offer this enhancement to its current service in as
 timely a manner as possible not to exceed 180 days after the date of this
 Agreement.

 IV.  Priceline Ticket Allocation Methodology; Participating Carriers

           1.   Priceline has established an allocation methodology that
 determines when a participating airline will be given the first opportunity
 to fill a customer ticket request. First and second looks are allocated to
 participating carriers  on the basis of objective quality of service index
 ("QSI") criteria provided by Airline Planning Group, LLC ("APG").  The
 allocation system will apply this O&D QSI in the top 2500 domestic and top
 2500 international markets based on demanded revenue.  In smaller O & D
 markets, "looks" will be allocated on the basis of aggregate carrier system
 share.  Priceline will not give any carrier a structural first or second
 look advantage that is more favorable than that given to USAirways.

           2.   Priceline will allocate US Airways' "First Look" and "Second
 Look" opportunities based on US Airways' QSI share of carriers
 participating in Priceline.  USAirways' first Looks will be written at the
 highest qualifying US Airways fare provided to Priceline. In cases where
 either the first or second look carrier fails to fulfill any given offer,
 Priceline reserves the right to allocate traffic as it chooses.

           3.   During the term of this Agreement, if Priceline offers
 another airline terms of participation affecting sales of airline tickets,
 including but not limited to the offer of airline availability, prices or
 promotions, that are in the aggregate more favorable than those offered to
 US Airways hereunder, then Priceline will offer US Airways the same or
 equivalent benefit.  This provision does not apply to agreements entered
 between Priceline and another airline prior to US Airways' participation in
 Priceline.

           4.   Priceline will not make any changes to its allocation or
 other processing methodology that will reduce US Airways' revenue share of
 sales through Priceline over the term of this Agreement.  US Airways market
 share, however, may be affected by the participation of fewer or additional
 airlines on a pro rata basis.  At US Airways request, Priceline will supply
 substantiation that that its allocation or other processing methodologies
 comply with the terms of this Agreement.

           5.   Priceline will work in good faith with US Airways to assist
 it in achieving its objective for the Priceline Service within the context
 of the allocation system set forth above.  Priceline may work in good faith
 with other participating airlines in achieving their objectives for the
 Priceline Service within the context of the allocation system.

 V.   Restriction on US Airways Participation.

           1.   In the following markets, Priceline is contractually
 restricted by Delta, from issuing US Airways tickets within the Priceline
 Service:

           a.   To/from Atlanta except between ATL-CLT/PHL/PIT and any
      market to or from ATL not served by Delta or its commuter
      affiliate(s).

           b.   To/from BOS to any market served from BOS on a nonstop basis
      by Delta or its commuter affiliate(s) except between BOS-CLT/PHL/PIT

           c.   To/from LGA to any market served from LGA on a nonstop basis
      by Delta or its commuter affiliate(s) except between LGA-CLT/PHL/PIT

           2.   US Airways acknowledges the existence of the restrictions on
 its participation.

 VI.  Priceline Customer Service

           1.   Priceline will provide twenty-four hour customer support
 services to all Priceline customers through a toll-free number at the
 customer support center designated by Priceline from time to time.  The
 customer support center will be adequately staffed with personnel trained
 to take Priceline Ticket requests by phone and respond to all customer
 inquiries for related service and support.

           2.   Priceline will use commercially reasonable efforts to ensure
 that its customer service representatives provide quality customer service
 and support to Priceline customers in a prompt, reliable and courteous
 manner.

           3.   Priceline will respond to Priceline customer questions and
 issues pertaining to special handling requirements for Priceline Tickets
 including processing any special customer handling requirements in respect
 of Priceline Tickets issued on US Airways.

           4.   The ticket Restrictions will apply to all tickets issued
 through the Priceline Service on US Airways.  US Airways may waive, at its
 own cost and expense, one or more of the Restrictions set forth in Article
 II, Sections 2(1)-(6) pursuant to a direct arrangement made by US Airways
 with the applicable customer holding a Priceline Ticket.  On an exception
 basis where necessary or appropriate to address an escalating customer
 service issue of any individual customer, Priceline may refund the price of
 a Priceline Ticket pursuant to the applicable customer. Priceline will
 report such refunds and cancellations to US Airways monthly.  In the event
 that such refunds exceed [**]% of gross ticket sales in any month, Priceline
 will implement such actions as are necessary to cause total refunds to be
 below [**]% of gross ticket sales in the following month.  If in any three
 month period, total refunds exceed [**]% of gross ticket sales, Priceline will
 be responsible for any refunds greater than [**]% of gross ticket sales.
 Priceline and US Airways will jointly develop any further guidelines on
 which such exception refunds will be governed.

 VII.   [**]

           1.   [**]

           2.   Priceline reserves the right to solely determine at what
 offer price customers may purchase an airline ticket through the Priceline
 Service.  However, Priceline will not agree with any airline to establish a
 minimum price in any O&D market.

           3.   Priceline will provide US Airways with participation rights
 in the Priceline Service as favorable as it provides to United Airlines and
 America Airlines, subject to restrictions in Article V.

 VIII.     Confidentiality

           1.   US Airways agrees to keep the terms of this agreement
 confidential until such time as Priceline has received formal notification
 from Delta Airlines validly consenting to US Airways' participation in the
 Priceline system.

           2.   Priceline and US Airways will each  hold in confidence and,
 without the prior written consent of the other, will not reproduce,
 distribute, transmit, transfer or disclose, directly or indirectly, in any
 form, by any means or for any purpose, any Confidential Information of the
 other party.  As used herein, the term "Confidential Information" shall
 mean this Agreement and its subject matter, and proprietary information
 that is provided to or obtained from one party to the other party including
 any information which derives economic value, actual or potential, from not
 being generally known to, and not generally ascertainable by proper means
 by, other persons, including the unpublished fares provided by US Airways
 to Priceline pursuant to this Agreement.  The recipient of Confidential
 Information may only disclose such information to its employees on a need-
 to-know basis.

           3.   The obligations of a recipient party with respect to
 Confidential Information shall remain in effect during and after the term
 of this Agreement (including any renewals or extensions hereof) and for a
 period of five (5) years thereafter, except to the extent such data:

           (1)  is or becomes generally available to the public other than
      as a result of a disclosure by the recipient, or its directors,
      officers, employees, agents or advisors;

           (2)  becomes available to the recipient on a non-confidential
      basis from a source other than the disclosing party or its affiliated
      companies, provided that such source is not bound by any
      confidentiality obligations to the disclosing party or its affiliated
      companies (as applicable); or

           (3)  is necessary to comply with applicable law or the order or
      other legal process of any court, governmental or similar authority
      having jurisdiction over the recipient.  US Airways acknowledges that
      Priceline may be required to file this Agreement with the Securities
      and Exchange Commission ("SEC"), as required by federal securities
      laws, and that such filing shall not be deemed a violation of the
      provisions of this Article VIII.

           4.   Except as otherwise specifically provided in Section 2(c) of
 this Article VIII with respect to Priceline's filing requirements with the
 SEC, in the event that the recipient becomes legally compelled to disclose
 any such Confidential Information by any governmental body or court,
 recipient will provide the disclosing party with prompt notice so that the
 disclosing party may seek a protective order or other appropriate remedy
 and/or waive compliance (in writing) with the provisions hereof.  In the
 event that such protective order or other remedy is not obtained, or the
 disclosing party waives (in writing) compliance with the provisions hereof,
 recipient will furnish only that portion of such Confidential Material
 which is legally required and will exercise its reasonable business efforts
 to obtain appropriate assurance that confidential treatment will be
 accorded such Confidential Information.

           5.   The recipient of Confidential Information will exercise
 reasonable commercial care in protecting the confidentiality of the other
 party's Confidential Information.

           6.   Priceline will not disclose (including, without limitation,
 by sale) to any third party information obtained through the Priceline
 Service concerning a customer who has acquired a ticket on US Airways using
 the Priceline Service.

 IX.  Proprietary Marks

           During the term of this Agreement neither Priceline nor US
 Airways shall use the other party's trademarks, trade names, service marks,
 logos, emblems, symbols or other brand identifiers in advertising or
 marketing materials, unless it has obtained the prior written approval of
 the other party.  The consent required by this Article IX shall extend to
 the content of the specific advertising or marketing items as well as the
 placement and prominence of the applicable trademark, trade name, service
 mark, logo, emblem, symbol or other brand identifier of the other party.
 Priceline or US Airways, as applicable, shall cause the withholding,
 discontinuance, recall or cancellation, as appropriate, of any advertising
 or promotional material not approved in writing by the other party, that
 differs significantly from that approved by the other party, or that is put
 to a use or used in a media not approved by the other party.

 X.   Reporting

           1.   Priceline will provide monthly reports in a format
 designated by US Airways summarizing (i) information concerning each ticket
 issued by Priceline on US Airways; (ii) aggregate information (i.e. non US
 Airways specific) for all tickets issued by Priceline in each O&D that US
 Airways participates; and (iii) aggregate information for all Priceline
 offers from customers not ticketed in each O&D that US Airways
 participates.

           2.   [**]

 XI.  Term of Agreement

           1.   This Agreement shall be effective on and as of the date
 first above written.  Thereafter, US Airways may unilaterally terminate
 this Agreement for any reason on 90 days' prior written notice to
 Priceline.  This agreement shall be binding to Priceline for a period of
 five years following the Commencement Date after which Priceline may
 unilaterally terminate this Agreement for any reason on 90 days' prior
 written notice to US Airways.

           2.   The obligations of the parties under Articles VIII and XII
 of this Agreement shall indefinitely survive the expiration or any
 termination of this Agreement.

           3.   In the event of written notice of termination of this
 Agreement in accordance with the terms of this Article XI, all Priceline
 Tickets issued on US Airways prior to the effective date of termination
 specified in such notice will be honored by US Airways under the terms of
 this Agreement.

 XII. Indemnification

           1.   Priceline will indemnify, defend and hold harmless US
 Airways, its officers, directors, employees and agents, from and against
 all damages, losses and causes of action including, without limitation,
 damage to property or bodily injury, to the extent caused by Priceline's
 breach of this Agreement of the ARC Agent Reporting Agreement, or by the
 negligence or willful acts of Priceline or any of its employees or agents.

           2.   US Airways will indemnify, defend and hold harmless
 Priceline and its officers, directors, employees and agents from and
 against all damages, losses and causes of actions including, without
 limitation, damage to property or bodily injury, to the extent caused by US
 Airways' breach of this Agreement or by the negligence or willful acts of
 US Airways or any of its employees or agents.

 XIII.     No Exclusivity

           The relationship by and between US Airways and Priceline as set
 forth in this Agreement shall be non-exclusive.  As such, US Airways may
 participate in other programs similar to the Priceline Service.

 XIV.      General Provisions

           1.   No waiver or breach of any of the provisions of this
 Agreement shall be construed as a waiver of any succeeding breach of the
 same or any other provision.

           2.   If any paragraph, sentence or clause of this Agreement shall
 be adjudged illegal, invalid or unenforceable, such illegality, invalidity
 or unenforceability shall not affect the legality, validity or
 enforceability of this Agreement as a whole or of any paragraph, sentence
 or clause hereof not so adjudged.

           3.   Any notice required or permitted hereunder shall be deemed
 sufficient if given in writing and delivered personally, by facsimile
 transmission, by reputable overnight courier service or United States mail,
 postage prepaid return receipt requested, to the addresses shown below or
 to such other addresses as are specified by similar notice, and shall be
 deemed received upon personal delivery, upon confirmed facsimile receipt,
 two (2) days following deposit with such courier service, or three (3) days
 from deposit in the United States mails, in each case as herein provided:

        If to Priceline:                If to US Airways:

        Priceline.com Incorporated      US Airways Inc.
        Five High Ridge Park            2345 Crystal Drive
        Stamford, CT 06905              Arlington, VA 22227

        Attention:  Paul Francis        Attention:  Thomas Mutryn
        Chief Financial Officer         Chief Financial Officer
        Phone:  (203) 705-3000          Phone:  (703) 872-5700
        Fax:  (203) 595-8344            Fax:

        With a copy to:                 With a copy to:

        Priceline.com Incorporated      US Airways Inc.
        Five High Ridge Park            2345 Crystal Drive
        Stamford, CT 06905              Arlington, VA 22227

        Attention:  Timothy G. Brier    Attention:  Assistant General Counsel
        Phone:  (203) 705-3000          Phone: (703) 872-5230
        Fax:  (203) 595-8343            Fax: (703) 872-7979

           A party may change its address and the name of its designated
 recipient of copies of notices for purposes of this Agreement by giving the
 other parties written notice of the new name and the address, phone and
 facsimile number of its designated recipient in accordance with this
 Article XIV, Section 3.

           4.   This Agreement supersedes and replaces all previous
 understandings or agreement, whether oral or in any written form, with
 respect to the US Airways' participation in the Priceline Service or any
 other subject matter addressed herein.  The captions in this Agreement are
 for convenience only and do not alter any terms of this Agreement.

           5.   This Agreement may be amended or modified only by a written
 amendment executed by the parties.

           6.   The formation, construction, performance and validity of
 this Agreement shall be governed by the internal laws of the State of
 Delaware.  Each party agrees that any civil suit or action brought against
 it as a result of any of its obligations under this Agreement may be
 brought against it either in the state or federal courts of the principal
 place of business of either party, and each party hereby irrevocably
 submits to the jurisdiction of such courts and irrevocably waives, to the
 fullest extent permitted by law, any objections that it may now or
 hereafter have to the laying of the venue of such civil suit or action and
 any claim that such civil suit or action has been brought in an
 inconvenient forum, and each party further agrees that final judgment in
 any such civil suit or action shall be conclusive and binding upon it and
 shall be enforceable against it by suit upon such judgment in any court of
 competent jurisdiction.

           7.   This Agreement may be executed in counterparts, each of
 which shall be deemed an original, and together, shall constitute one and
 the same instrument.  Execution may be effected by delivery of facsimiles
 of signature pages (and the parties shall follow such delivery by prompt
 delivery of originals of such pages).

           8.   No party will in any manner or by any device, either
 directly or indirectly, act in violation of any applicable law,
 governmental order or regulation.  Priceline shall comply at all times with
 the provisions of US Airways' tariffs (except where such tariffs are
 specifically amended by US Airways under the terms of this Agreement) and
 the terms of the ARC Agent Reporting Agreement and any addenda thereto.

           9.   Priceline agrees to notify US Airways promptly, in writing,
 in the event there is a change of control in the ownership of Priceline.
 For purposes of this Agreement, a "change of control" means (i) the
 acquisition by any other person or group (within the meaning of Section
 13(d)(3) of the Securities Exchange Act (except an employee group of such
 party, any of its subsidiaries or a holding company of such party)), of the
 beneficial ownership of securities representing 20% or more of the combined
 voting power of the securities entitled to vote generally in the election
 of the board of directors of the applicable party, or (ii) the sale,
 mortgage, lease or other transfer of assets or earning power constituting
 more than 50% of the assets or earning power of such party (other than
 ordinary course financing); provided that in no event shall a "change of
 control" be defined to include (i) an initial public offering of shares of
 the party's capital stock, (ii) the formation by a party of a holding
 company, or (iii) an intra-corporate transaction with a company under
 common control with a party.

           10.  No party hereto shall assign or transfer or permit the
 assignment or transfer of this Agreement without the prior written consent
 of the other party.

           11.  This Agreement shall not be deemed to create any partnership
 or joint venture between US Airways and Priceline, or to create any rights
 in favor of any person or entity other than the parties hereto.  This
 Agreement is for the sole benefit of the parties and nothing herein
 expressed or implied shall give or be construed to give any other person
 any legal or equitable rights hereunder.

           12.  NO PARTY WILL BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL
 DAMAGES, INCLUDING LOST REVENUES, LOST PROFITS, OR LOST PROSPECTIVE
 ECONOMIC ADVANTAGE, ARISING FROM THIS AGREEMENT OR ANY BREACH HEREOF.

           13.  THE PARTIES AGREE THAT IRREPARABLE DAMAGE WOULD OCCUR IN
 THE EVENT ANY PROVISION OF THIS AGREEMENT IS NOT PERFORMED IN ACCORDANCE
 WITH THE TERMS HEREOF AND THAT THE PARTIES SHALL BE ENTITLED TO AN
 INJUNCTION OR INJUNCTIONS TO PREVENT BREACHES OF THIS AGREEMENT AND TO
 ENFORCE SPECIFICALLY THE TERMS AND PROVISIONS OF THIS AGREEMENT.

           14.  Each party has participated in the negotiation and drafting
 of this Agreement.  In the event any ambiguity or question of intent or
 interpretation arises, this Agreement shall be construed as if drafted
 jointly by the parties, and no presumption or burden of proof shall arise
 favoring or disfavoring any party by virtue of the authorship of any of the
 provisions of this Agreement.

           IN WITNESS WHEREOF, the parties have executed and delivered this
 Agreement on the date indicated above.

 PRICELINE.COM INCORPORATED                   US AIRWAYS INC.

 By: _________________________                By: _________________________
    Name:                                         Name:
    Title:                                        Title:

[**]=Confidential Treatment requested for redacted portionCONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR CERTAIN
           PORTIONS OF THIS DOCUMENT. CONFIDENTIAL PORTIONS HAVE BEEN
               FILED WITH THE SECURITIES AND EXCHANGE COMMISSION.

THE WARRANT ISSUED PURSUANT TO THIS PARTICIPATION WARRANT AGREEMENT HAS NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR ANY STATE SECURITIES
LAWS. IT MAY NOT BE SOLD OR OFFERED FOR SALE, PLEDGED, HYPOTHECATED OR
OTHERWISE TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT
UNDER SAID ACT AND APPLICABLE STATE SECURITIES LAWS UNLESS THE COMPANY HAS
RECEIVED AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH
REGISTRATION IS NOT REQUIRED TO EFFECTUATE SUCH TRANSACTION.

                      PARTICIPATION WARRANT AGREEMENT
                     To Purchase Shares of Common Stock
                       Dated as of November 17, 1999
                         PRICELINE.COM INCORPORATED
                           a Delaware Corporation

                                                 Issue Date  November 17, 1999

THIS CERTIFIES THAT, U S Airways, Inc. (the "Warrant Holder"), with a place
of business at Crystal Park Four, 2345 Crystal Drive, Arlington, Virginia
22227, for value received, is entitled, upon the terms and subject to the
conditions of this Participation Warrant Agreement (this "Warrant
Agreement"), to subscribe for and purchase fully-paid and non-assessable
shares of common stock, par value $.008 per share (the "Common Stock"), of
priceline.com Incorporated, a Delaware corporation (the "Company").

      1.    Issuance of Warrants. On the Issue Date, the Company will issue
            to the Warrant Holder warrants (the "Warrants") to acquire One
            Million Five Hundred Thousand (1,500,000) shares of the Common
            Stock (the "Shares"), subject to adjustment as hereinafter
            provided pursuant to Section 10 herein.

      2.    Exercise Price. The Warrants have an exercise price of $52.625
            per share of Common Stock, as adjusted pursuant to the
            provisions of Section 10 of this Warrant Agreement (the
            "Exercise Price").

      3.    Term. The Warrants are fully vested on the Issue Date. Except
            as otherwise provided for herein, the term of the Warrants and
            the right to purchase Shares as granted herein shall be
            exercisable on the fifth (5th) anniversary of the Issue Date;
            provided, further, that if any of the Warrants first become
            exercisable on the fifth (5th) anniversary of the Issue Date,
            the Warrant Holder will have an additional six months
            thereafter to exercise its purchase rights in respect of those
            Warrants (the end of such five year period and additional six
            months, if applicable, being referred to herein as the
            "Termination Date").

      4.    Exercise Events.

            (a) General. Unless otherwise exercisable at an earlier date,
in accordance with this Section 4, all of the Warrants shall be fully
exercisable commencing of the fifth anniversary of the Issue Date.

            (b) Early Exercise Rights. Subject to the provisions of Section
4(d) hereof, Warrant Holder shall have the following early exercise rights:

            (i)  The Warrant Holder will earn the right to exercise Warrants
                 for the first [**] Shares, subject to adjustment as
                 provided in Section 10 hereof, upon completion of any
                 Measuring Period (as identified in Section 4(c) hereof)
                 during which the Company has sold at least $[**] million of
                 tickets issued for travel on the Warrant Holder, its
                 subsidiaries and/or on the Warrant Holder's code share
                 partners using Warrant Holder's code (collectively, "Warrant
                 Holder and Code Share Partners") (such amount being measured
                 by the amount paid by the Company to the Warrant Holder and
                 its code share partners net of federal excise taxes on such
                 amount, PFCs and related collections) ("Net Revenue").

            (ii) The Warrant Holder will earn the right to exercise Warrants
                 for the full amount of the second [**] Shares, subject to
                 adjustment as provided in Section 10 hereof, upon completion
                 of any Measuring Period during which the Company has sold at
                 least $[**] million of Net Revenue. If, upon completion of
                 any Measuring Period, the Company has sold more than $[**]
                 million but less than $[**] million of Warrant Holder Net
                 Fares during such Measuring Period, Warrant Holder will earn
                 the right to exercise that number of Warrants for a portion
                 of the second [**] Shares, subject to adjustment as
                 provided in Section 10 hereof, equal to the product of (i)
                 [**] (subject to adjustment as provided in Section 10
                 hereof) multiplied by (ii) a fraction, the numerator of
                 which shall be the Net Revenue in excess of $[**] million sold
                 by the Company during such Measuring Period, and the
                 denominator of which shall be $[**] million.

           (iii) Net Revenue will be measured separately, not cumulatively, for
                 each measuring period. For example, if the Company has sold
                 Warrant Holder Net Fares of $[**] million during the first
                 Measuring Period, $[**] million during the second Measuring
                 Period, and $[**] million during the third Measuring Period,
                 then the Warrant Holder will earn the right to exercise
                 Warrants for [**] Shares upon completion of the first Measuring
                 Period, the right to exercise Warrants for [**] Shares ([**] x
                 [**]) upon completion of the second Measuring Period, and the
                 right to execise Warrants for [**] Shares ([**] x [**]) upon
                 completion of the third Measuring Period. For purposes of this
                 example, it is assumed that no adjustment pursuant to Section
                 10 hereof has occurred.

            (iv) Notwithstanding the Net Revenue benchmarks specified in clauses
                 (i) and (ii) of this Section 4(b) for the early exercisability
                 of Warrants, if, in any Measuring Period, the Company fails to
                 achieve the minimum Net Revenue from ticket sales for travel on
                 Warrant Holder and its Code Share Partners necessary to enable
                 Warrant Holder to exercise Warrants thereunder, then, effective
                 on the completion of such Measuring Period and thereafter,
                 Warrant Holder (i) shall have the right to exercise Warrants
                 for [**] Shares, subject to adjustment as provided in Section
                 10 hereof, if Warrant Holder's and its Code Share Partners'
                 percentage of the Aggregate Ticket Sales Revenues (as defined
                 in Section 4(c)) for U.S. originating O&D's for such Measuring
                 Period equals or exceeds [**]% of Warrant Holder's Fair Share
                 (as defined in Section 4(c) below), and (ii) shall have the
                 right to exercise Warrants for [**] Shares, if Warrant Holder's
                 and its Code Share Partners' percentage of the Aggregate Net
                 Ticket Sale Revenues for U.S. originating O&D's for such
                 Measuring Period equals or exceeds [**]% of Warrant Holder's
                 Fair Share. In the event that in any Measuring Period, the
                 Warrant Holder exceeds [**]% of its Fair Share but does not
                 reach [**]% of its Fair Share, then Warrant Holder will earn
                 the right to exercise that number of Warrants for a portion of
                 the second [**] Shares, subject to adjustment as provided in
                 Section 10 hereof, equal to the product of (i) [**] (subject to
                 adjustment as provided in Section 10 hereof) multiplied by (ii)
                 a fraction, the numerator of which shall be the Fair Share
                 percentage (expressed as a number and not a percentage) in
                 excess of [**]% achieved by the Warrant Holder and its Code
                 Share Partners during such Measuring Period, and the
                 denominator of which shall be [**]. Fair Share will be measured
                 separately, not cumulatively, for each Measuring Period. For
                 example, if the Warrant Holder achieves [**]% of its Fair Share
                 during the first Measuring Period, [**]% of its Fair Share
                 during second Measuring Period, and [**]% during the third
                 Measuring Period, then the Warrant Holder will earn the right
                 to exercise Warrants for [**] Shares upon completion of the
                 first Measuring Period, the right to exercise Warrants for [**]
                 Shares ([**] x [**]) upon completion of the second Measuring
                 Period, and the right to exercise Warrants for [**] Shares
                 ([**] x [**]) upon completion of the third Measuring Period.

            (c)   Measuring Periods; Fair Share; Aggregate Net Ticket Sale
Revenues.

            (i)  Each Measuring Period shall be a 12 month period, with the
                 first Measuring Period commencing on the date the Warrant
                 Holder first provides tickets for sale by the Company (the
                 "First Ticket Date") and ending on the first anniversary of
                 such date. Subsequent Measuring Periods will expire on the
                 second, third, fourth and fifth anniversary of the First
                 Ticket Date, respectively; provided that the last Measuring
                 Period will expire on the fifth anniversary of the Issue Date.

            (ii) As used in this Warrant Agreement, the term "Fair Share"
                 shall mean Warrant Holder's domestic market share calculated
                 as a fraction, the numerator of which shall be Warrant
                 Holder's RPM's for U.S. originating O&D's only, and the
                 denominator of which shall be the total RPM's for U.S.
                 originating O&D's only of all of the Company's participating
                 airlines. The forgoing calculation shall excluded in the
                 numerator and the denominator, O&D markets in which Warrant
                 Holder is restricted from providing service in the Company's
                 airline ticket service ("Restricted Markets").

           (iii) As used is this Warrant Agreement, the term "Aggregate Net
                 Ticket Sale Revenues" for any Measuring Period, shall mean,
                 the total amount paid by the Company to its participating
                 airlines, including Warrant Holder and its Code Share
                 Partners for airline tickets sold for US originating O&D's
                 (excluding O&D's for Restricted Markets) on all of the
                 Company's participating airlines, net of federal excise
                 taxes on such amounts, PFCs and related collections.

            (d) Warrant Holder's right to earn early exercise rights under
Section 4(b) is contingent upon Airline's NOT TAKING AN EQUITY POSITION OF
ANY NATURE WHATSOEVER, including, without limitation, common stock,
preferred stock, warrants, options, or debt, in any other operator or
affiliate thereof (an "Operator") of a "demand collection system" for sale
of airline tickets over the Internet. For purposes of this Section 4(d),
"demand collection system" is narrowly defined as an airline ticket service
that (i) enables a consumer to name the price the consumer is willing to
pay for one or more airline tickets prior to the Seller's display of the
price actually paid by the consumer, (ii) enables the seller to bind the
consumer to the consumer's offer price upon the seller's acceptance of the
consumer's offer, and (iii) does not permit the consumer to specify the
exact airline on which the consumer is willing to fly. In order for Warrant
Holder to be entitled to earn the early exercise rights specified in
Section 4(b)(i) and 4(b)(ii), as the case may be, Warrant Holder must not
at any time between the date hereof and the date it earns such early
exercise rights, take an equity position of any nature whatsoever in any
Operator of a "demand collection system" other than the Company's for the
sale of airline tickets over the Internet. For example, if in the first
Measuring Period, the Company achieves Net Revenues that would entitle the
Warrant Holder to exercise Warrants for the first 750,000 Shares, the
Warrant Holder will be entitled to exercise such Warrants at all times
after the completion of such Measuring Period so long as the Warrant Holder
at all times from the date hereof though the date it earned such early
exercise rights had not taken an equity position in any other Operator of a
"demand collection system" for the sale of airline tickets over the
Internet. If at any time from the date hereof prior to the fifth 5th
anniversary of the Grant Date, the Warrant Holder takes an equity position
in an Operator of another "demand collection system" for the sale of
airline tickets over the Internet, the Warrant Holder's right to earn early
exercise rights will terminate and be of no further force or effect with
respect to Warrants for which Warrant Holder did not earn early exercise
rights prior to the date of Warrant Holder's taking such equity position,
and such Warrants will become exercisable on the fifth 5th anniversary of
the Grant Date.

     5.   Exercise of Purchase Rights. Subject to the provisions of Section
          4 of this Warrant Agreement, the purchase rights represented by
          this Warrant Agreement are exercisable by the Warrant Holder, in
          whole or in part, at any time, or from time to time during the
          period set forth in Section 3 above, by tendering to the Company
          at its principal office a duly completed and executed notice of
          exercise in the form attached hereto as Exhibit A (the "Notice of
          Exercise"), the Warrants and the Exercise Price. Upon receipt of
          such items, the Company shall issue to the Warrant Holder a
          certificate for the number of shares of Common Stock purchased.
          The Warrant Holder, upon exercise of the Warrants, shall be
          deemed to have become the holder of the Shares represented
          thereby (and such Shares shall be deemed to have been issued)
          immediately prior to the close of business on the date or dates
          upon which the Warrants are exercised. In the event of any
          exercise of the rights represented by the Warrants, certificates
          for the Shares so purchased shall be delivered to the Warrant
          Holder or its designee as soon as practical and in any event
          within ten (10) business days after receipt of such notice and,
          unless the Warrants have been fully exercised or expired, new
          Warrants representing the remaining portion of the Warrants and
          the underlying Shares, if any, with respect to which this Warrant
          Agreement shall not then have been exercised shall also be issued
          to the Warrant Holder as soon as possible and in any event within
          such tenday period.

     6.   Reservation of Shares. The Company will at all times have
          authorized and reserved a sufficient number of shares of Common
          Stock to provide for the exercise of the rights to purchase the
          Shares as provided in this Warrant Agreement. All of the Shares
          shall be duly authorized and, when issued upon such exercise,
          shall be validly issued, fully paid and nonassessable, and free
          and clear of all preemptive rights.

     7.   No Fractional Shares. No fractional shares or scrip representing
          fractional shares shall be issued upon the exercise of the
          Warrant Holder's rights to purchase the Shares.

     8.   No Rights as Shareholder. This Warrant Agreement does not entitle
          the Warrant Holder to any voting rights or other rights as a
          shareholder of the Company prior to the exercise of the Warrant
          Holder's rights to purchase the Shares as provided for herein.

     9.   Redemption. The Warrants represented by this Warrant Agreement
          are not redeemable by the Company.

     10.  Adjustment Rights. The Exercise Price and the number of shares of
          Common Stock purchasable hereunder are subject to adjustment from
          time to time, as follows:

          (a) Merger. If at any time there shall be a merger or consolidation
of the Company with or into another corporation when the Company is not the
surviving corporation, then, as part of such merger or consolidation,
lawful provision shall be made so that the holder of the Warrants evidenced
hereby shall thereafter be entitled to receive upon exercise of rights
herein granted, during the period specified herein and upon payment of the
aggregate Exercise Price, the number of shares of stock or other securities
or property of the successor corporation resulting from such merger or
consolidation, to which a holder of the stock deliverable upon exercise of
the rights granted in this Warrant Agreement would have been entitled in
such merger or consolidation if such rights had been exercised immediately
before such merger or consolidation. In any such case, appropriate
adjustment shall be made in the application of the provisions of this
Warrant Agreement with respect to the rights and interests of the holder
after the merger or consolidation. The Company will not effect any such
merger or consolidation unless, prior to the consummation thereof, the
successor corporation shall assume, by written instrument reasonably
satisfactory in form and substance to the Warrant Holder, the obligations
of the Company under the Warrants.

            (b) Reclassification, Etc. If the Company at any time shall, by
subdivision, combination or reclassification of securities or otherwise,
change any of the securities as to which purchase rights under this Warrant
Agreement exist into the same or a different number of securities of any
other class or classes, this Warrant Agreement shall thereafter represent
the right to acquire such number and kind of securities as would have been
issuable as the result of such change with respect to the securities which
were subject to the purchase rights under this Warrant Agreement
immediately prior to such subdivision, combination, reclassification or
other change.

            (c) Split, Subdivision or Combination of Shares. If the Company
at any time shall split or subdivide its Common Stock, the Exercise Price
shall be proportionately decreased and the number of Shares issuable
pursuant to this Warrant Agreement shall be proportionately increased. If
the Company at any time shall combine or reverse split its Common Stock,
the Exercise Price shall be proportionately increased and the number of
Shares issuable pursuant to this Warrant Agreement shall be proportionately
decreased.

            (d) Stock Dividends. If the Company at any time shall pay a
dividend payable in Common Stock, then the Exercise Price shall be
adjusted, from and after the date of determination of stockholders entitled
to receive such dividend, to that price determined by multiplying the
Exercise Price in effect immediately prior to such date of determination by
a fraction (i) the numerator of which shall be the total number of shares
of Common Stock outstanding immediately prior to such dividend and (ii) the
denominator of which shall be the total number of shares of Common Stock
outstanding immediately after such dividend. The Warrant Holder shall
thereafter be entitled to purchase, at the Exercise Price resulting from
such adjustment, the number of shares of Common Stock (calculated to the
nearest whole share) obtained by multiplying (i) the Exercise Price in
effect immediately prior to such adjustment by (ii) the number of shares of
Common Stock issuable upon the exercise hereof immediately prior to such
adjustment and dividing the product thereof by the Exercise Price resulting
from such adjustment.

            (e) Other Changes. If any change in the outstanding Common
Stock of the Company or any other event occurs as to which the other
provisions of this Section 10 are not strictly applicable or if strictly
applicable, would not fairly protect the purchase rights of the Warrant
Holder in accordance with such provisions, then the Board of Directors of
the Company shall make an adjustment in the number of and class of shares
available under the Warrants, the Exercise Price or the application of such
provisions, so as to protect the purchase rights of the Warrant Holder. The
adjustment shall be such as will give the Warrant Holder upon exercise for
the same aggregate Exercise Price the total number, class and kind of
shares or other property as the Warrant Holder would have owned had the
Warrants been exercised prior to the event and had the Warrant Holder
continued to hold such shares until after the event requiring adjustment.

            (f) Notice of Adjustments; Notices. Whenever the Exercise Price
or number of shares purchasable hereunder shall be adjusted pursuant to
Section 10 hereof, the Company shall issue a certificate signed by its
Chief Executive Officer or Chief Financial Officer setting forth, in
reasonable detail, the event requiring the adjustment, the amount of the
adjustment, the method by which such adjustment was calculated and the
Exercise Price and number of shares purchasable hereunder after giving
effect to such adjustment, and shall cause a copy of such certificate to be
mailed (by first class mail, postage prepaid) to the holder of this
Warrant. The Company shall give written notice to the Warrant Holder at
least 10 days prior to the date on which the Company closes its books or
takes a record for determining rights to receive any dividends or
distributions. The Company shall also give written notice to the Warrant
Holder at least 30 business days prior to the date on which a merger or
consolidation of the Company with or into another corporation when the
Company is not the surviving corporation shall take place.

            (g) No Change of Warrant Necessary. Irrespective of any
adjustment in the Exercise Price or in the number or kind of securities
issuable upon exercise of the Warrant, unless the Warrant Holder otherwise
requests, this Warrant Agreement may continue to express the same price and
number and kind of shares of Common Stock as are stated in this Warrant
Agreement as initially executed.

      11. Representations and Warranties of the Warrant Holder.

      The Warrant Holder hereby represents and warrants to the Company as
follows:

            (a) Existence and Power. The Warrant Holder is a (i) is a
corporation duly organized, validly existing and in good standing under the
laws of the jurisdiction of its incorporation and (ii) has the corporate
power and authority to execute, deliver and perform its obligations under
this Warrant Agreement.

            (b) Authorization; No Contravention. The execution, delivery
and performance by the Warrant Holder of this Warrant Agreement and the
transactions contemplated hereby (i) have been duly authorized by all
necessary corporate action of the Warrant Holder and (ii) do not contravene
the terms of the Certificate of Incorporation or Bylaws of the Warrant
Holder, each as amended as of and through the Issue Date.

            (c) Governmental Authorization; Third Party Consents. No
approval, consent, compliance, exemption or authorization of any
governmental authority or agency, or of any other person or entity, is
necessary or required in connection with the execution, delivery or
performance by, or enforcement against, the Warrant Holder of this Warrant
Agreement or the transactions contemplated hereby.

            (d) Binding Effect. This Warrant Agreement has been duly
executed and delivered by the Warrant Holder and constitutes the valid and
binding obligations of the Warrant Holder, enforceable against it in
accordance with its terms, except as enforceability may be limited by
applicable bankruptcy, insolvency, reorganization, fraudulent conveyance or
transfer, moratorium or similar laws affecting the enforcement of
creditors' rights generally or by equitable principles relating to
enforceability (regardless of whether considered in a proceeding at law or
in equity).

            (e) Purchase for Own Account. The Warrants issued to the
Warrant Holder pursuant to this Warrant Agreement, and the Shares to be
issued upon vesting and exercise thereof, are being or will be acquired for
the Warrant Holder's own account and with no intention of distributing or
reselling such securities or any part thereof in any transaction that would
be in violation of the securities laws of the United States of America, or
any state.

            (f) Restricted Securities. The Warrant Holder understands that
the Warrants and the Shares issuable upon vesting and exercise of the
Warrants, will not be registered at the time of their issuance under the
Securities Act for the reason that the sale provided for in this Agreement
is exempt pursuant to Section 4(2) of the Securities Act and that reliance
of the Company on such exemption is predicated in part on such Warrant
Holder's representations set forth herein. The Warrant Holder represents
that it is experienced in evaluating companies such as the Company, has
such knowledge and experience in financial and business matters as to be
capable of evaluating the merits and risks of its investment and has the
ability to suffer the total loss of the investment. The Warrant Holder
further represents that it has had the opportunity to ask questions of and
receive answers from the Company concerning the terms and conditions of the
Warrants, the business of the Company, and to obtain additional information
to such Warrant Holder's satisfaction.

            (g) Accredited Investor. The Warrant Holder is an "Accredited
Investor" within the meaning of Rule 501 of Regulation D under the
Securities Act, as presently in effect.

      12.   Compliance with Securities Act; Transferability of Warrant or
            Shares of Common Stock.

            (a) Compliance with Securities Act. The Warrant Holder, by
acceptance hereof, agrees that the Warrants, and the shares of Common Stock
to be issued upon exercise of the Warrants, are being acquired for
investment and that such Warrant Holder will not offer, sell or otherwise
dispose of the Warrants, or any shares of Common Stock to be issued upon
exercise of the Warrants except under circumstances which will not result
in a violation of the Securities Act of 1933, as amended (the "Securities
Act"), or any applicable state securities laws. The Warrants and all shares
of Common Stock issued upon exercise of the Warrants (unless registered
under) the Securities Act and any applicable state securities laws) shall
be stamped or imprinted with a legend in substantially the following form:

            "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
            ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES LAW. THEY MAY
            NOT BE SOLD OR OFFERED FOR SALE, PLEDGED, HYPOTHECATED OR
            OTHERWISE TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE
            REGISTRATION STATEMENT RELATED THERETO UNDER SAID ACT AND
            APPLICABLE STATE SECURITIES LAWS OR UNLESS THE COMPANY HAS
            RECEIVED AN OPINION OF COUNSEL THAT SUCH REGISTRATION IS NOT
            REQUIRED TO EFFECTUATE SUCH TRANSACTION."

            (b) Exchange, Transfer, Assignment or Loss of Warrants. The
Warrants cannot be exchanged, transferred or assigned otherwise than in
accordance with applicable law. Upon compliance with applicable law and
surrender of the Warrants to the Company with the Assignment Form annexed
hereto as Exhibit B duly executed, and funds sufficient to pay any transfer
tax, the Company shall, without charge, execute and deliver a new Warrant
Agreement in the name of the heir, devisee or assignee named in such
instrument of assignment and this Warrant Agreement shall promptly be
canceled. In the event that Warrant Holder sells, assigns or transfers this
Warrant Agreement and the Warrants represented hereby, the early exercise
rights and restrictions set forth in Section 4(b), 4(c), and 4(d) shall
survive, provided, that the determination, at any time and from time to
time, of whether the new Warrant Holder shall be entitled to early exercise
rights under such sections will be made on whether US Airways, Inc. has
achieved and/or does achieve the performance targets specified in Sections
4(b) and 4(c) and has and continues even after the assignment to be in
compliance with the restrictions set forth in Section 4(d). Accordingly, if
at any time, before or after a sale, assignment or transfer of this Warrant
Agreement and the Warrants represented hereby, US Airways, Inc. (if it had
continued to the hold Warrants represented hereby) would not be entitle to
early exercise rights, the assignee hereof will not be entitle to the early
exercise rights.

     13.  Restricted Securities. The Warrant Holder understands that the
          Warrants and the Shares issuable upon vesting and exercise of the
          Warrants, will not be registered at the time of their issuance
          under the Securities Act for the reason that the sale provided
          for in this Agreement is exempt pursuant to Section 4(2) of the
          Securities Act based on the representations of the warrant Holder
          set forth herein. The Warrant Holder represents that it is
          experienced in evaluating companies such as the Company, has such
          knowledge and experience in financial and business matters as to
          be capable of evaluating the merits and risks of its investment
          and has the ability to suffer the total loss of the investment.
          The Warrant Holder further represents that it has had the
          opportunity to ask questions of and receive answers from the
          Company concerning the terms and conditions of the Warrants, the
          business of the Company, and to obtain additional information to
          such Warrant Holder's satisfaction. The Warrant Holder is an
          "Accredited Investor" within the meaning of Rule 501 of
          Regulation D under the Securities Act, as presently in effect.

     14.  Registration Rights. The Company will use its best efforts to
          cause the Warrant Holder to become a party to that certain
          Amended Registration Rights Agreement, dated as of December 8,
          1998, by and among the Company and the stockholders of the
          Company named therein, on such terms and conditions as may be
          reasonably acceptable to the Company, the Warrant Holder and the
          other stockholders party to such Amended Registration Rights
          Agreement.

     15.  Miscellaneous.

          (a) No Consequential Damages. No party hereto shall be entitled to
consequential damages as a result of any breach of a covenant, representation
or warranty contained herein.

          (b) Notices. All notices, demands and other communications provided
for or permitted hereunder shall be made in writing and shall be by
registered or certified firstclass mail, return receipt requested,
telecopier, courier service or personal delivery:

            (i)   if to the Company, to:

                  priceline.com Incorporated
                  Five High Ridge Park
                  Stamford, CT 06905
                  Telecopy:  (203) 5958345
                  Attention:  Melissa M. Taub, Esq.

            (ii)  if to the Warrant Holder, to:

                  U S Airways, Inc.
                  Crystal Park Four
                  2345 Crystal Drive
                  Arlington, VA  22227
                  Telecopy:
                  Attention:Joseph A. Haik
                            Director, System Forecasts

                  and to:

                  U S Airways, Inc.
                  Crystal Park Four
                  2345 Crystal Drive
                  Arlington, VA  22227
                  Telecopy:
                  Attention:  General Counsel

            (c) All such notices and communications shall be deemed to have
been duly given when delivered by hand, if personally delivered; when
delivered by courier, if delivered by commercial courier service; five (5)
business days after being deposited in the mail, postage prepaid, if
mailed; and when receipt is mechanically acknowledged, if telecopied.

            (d) Successors and Assigns; Third Party Beneficiaries. This
Agreement shall inure to the benefit of and be binding upon the successors
and permitted assigns of the parties hereto. No person, other than the
parties hereto and their successors and permitted assigns, is intended to
be a beneficiary of this Agreement.

            (e) Amendment and Waiver.

            (i) No failure or delay on the part of the Company, or the
                Warrant Holder in exercising any right, power or remedy
                hereunder shall operate as a waiver thereof, nor shall
                any single or partial exercise of any such right, power
                or remedy preclude any other or further exercise
                thereof or the exercise of any other right, power or
                remedy. The remedies provided for herein are cumulative
                and are not exclusive of any remedies that may be
                available to the Company and the Warrant Holder at law,
                in equity or otherwise.

           (ii) Any amendment, supplement or modification of or to any
                provision of this Warrant Agreement, any waiver of any
                provision of this Warrant Agreement, and any consent to
                any departure by the Company or the Warrant Holder from
                the terms of any provision of this Agreement, shall be
                effective only if it is made or given in writing and
                signed by the Company and the Warrant Holder.

            (f) Counterparts. This Warrant Agreement may be executed in any
number of counterparts and by the parties hereto in separate counterparts,
each of which when so executed shall be deemed to be an original and all of
which taken together shall constitute one and the same agreement.

            (g) Headings. The headings in this Warrant Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

            (h) GOVERNING LAW. THIS WARRANT AGREEMENT SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE, WITHOUT
REGARD TO THE PRINCIPLES OF CONFLICTS OF LAW OF ANY JURISDICTION.

            (i) Severability. If any one or more of the provisions
contained herein, or the application thereof in any circumstance, is held
invalid, illegal or unenforceable in any respect for any reason, the
validity, legality and enforceability of any such provision in every other
respect and of the remaining provisions hereof shall not be in any way
impaired, unless the provisions held invalid, illegal or unenforceable
shall substantially impair the benefits of the remaining provisions hereof.

            (j) Entire Agreement. This Warrant Agreement, together with the
exhibits hereto is intended by the parties as a final expression of their
agreement and intended to be a complete and exclusive statement of the
agreement and understanding of the parties hereto in respect of the subject
matter contained herein. This Warrant Agreement, together with the exhibits
hereto, supersedes all prior agreements and understandings between the
parties with respect to such subject matter and, specifically, this Warrant
Agreement replaces the Participation Warrant Agreement dated September
16th, 1999 (September Warrant) which was executed but not effective until
approved by delta Air Lines, Inc. the September Warrant is void and no
further in effect.

            (k) Publicity. Except as may be required by law, none of the
parties hereto shall issue a publicity release or public announcement or
otherwise make any disclosure concerning this Warrant Agreement or the
transactions contemplated hereby, without prior approval by the other party
(which approval shall not be unreasonably withheld); provided, however,
that nothing in this Warrant Agreement shall restrict the Warrant Holder
from disclosing information (a)that is already publicly available and (b)
to its attorneys, accountants, consultants and other advisors to the extent
necessary to obtain their services in connection with the Warrant Holder's
investment or participation in the Company. If any announcement is required
by law to be made by any party hereto concerning this Warrant Agreement or
the transactions contemplated hereby, prior to making such announcement
such party will deliver a draft of such announcement to the other parties
and shall give the other parties an opportunity to comment thereon.

            (l) Charges; Taxes and Expenses. Issuance of certificates for
shares upon the exercise of the Warrants shall be made without charge to
the Warrant Holder for any issue or transfer tax or other incidental
expense in respect of the issuance of such certificates, all of which taxes
and expenses shall be paid by the Company.

            (m) Saturdays, Sundays, Holidays, Etc. If the last or appointed
day for the taking of any action or the expiration of any right required or
granted herein shall be a Saturday, Sunday or a legal holiday, then such
action may be taken or such right may be exercised on the next succeeding
day not a Saturday, Sunday or a legal holiday.

            (n) Lost Warrants. The Company covenants to the Warrant Holder
that, upon receipt of evidence reasonably satisfactory to the Company of
the loss, theft, destruction or mutilation of this Warrant Agreement and,
in the case of any such loss, theft or destruction, upon receipt of an
indemnity reasonably satisfactory to the Company, or in the case of any
such mutilation, upon surrender and cancellation of this Warrant Agreement,
the Company will make and deliver a new Warrant Agreement of like tenor, in
lieu of the lost, stolen, destroyed or mutilated document.

            (o) Further Assurances. Each of the parties shall execute such
documents and perform such further acts (including, without limitation,
obtaining any consents, exemptions, authorizations or other actions by, or
giving any notices to, or making any filings with, any governmental
authority or any other person, and otherwise fulfilling, or causing the
fulfillment of, the various obligations made herein), as may be reasonably
required or desirable to carry out or to perform the provisions of this
Warrant Agreement and to consummate and make effective as promptly as
possible the transactions contemplated by this Warrant Agreement.

IN WITNESS WHEREOF, this Warrant Agreement has been duly executed and
delivered by the authorized officers of each of the undersigned.

                                    PRICELINE.COM INCORPORATED

                                    By:_______________________________________
                                       Name:
                                       Title:

                                    U S AIRWAYS, INC.

                                    By:_______________________________________
                                       Name:
                                       Title:

                                 EXHIBIT A

                             NOTICE OF EXERCISE

To:   Priceline.com Incorporated

            1. The undersigned hereby elects to purchase __________ shares
of the Common Stock of priceline.com Incorporated pursuant to the terms of
the Warrant Participation Agreement, dated as of _________________, 1999,
by and between priceline.com Incorporated and the undersigned (the "Warrant
Agreement"), and tenders herewith payment of the purchase price of such
shares in full.

            2. Please issue a certificate or certificates representing said
shares in the name of the undersigned.

                                    U S AIRWAYS, INC.

                                    By:______________________________________

                                    _________________________________________
                                    (Print Name of Signatory)

                                    _________________________________________
                                    (Title of Signatory)

Date:________________

                                 EXHIBIT B

                              ASSIGNMENT FORM

TO:   priceline.com Incorporated

The undersigned hereby assigns and transfers unto ____________________________
of ___________________________________________________________________________
      (Please typewrite or print in block letters)
the right to purchase ____________ shares of the common stock of
priceline.com Incorporated subject to the Warrant Participation Agreement,
dated as of ________________, 1999, by and between priceline.com
Incorporated and the undersigned (the "Warrant Agreement").

This assignment complies with the provisions of Section 12(b) of the
Warrant Agreement and is accompanied by funds sufficient to pay all
applicable transfer taxes.

                                    U S AIRWAYS, INC.

                                    By:___________________________________

                                    ______________________________________
                                    (Print Name of Signatory)

                                    ______________________________________
                                    (Title of Signatory)

                                    Date:_________________________________

EXHIBIT C

ACKNOWLEDGMENT AND AGREEMENT
TO THE AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

     WHEREAS, pursuant to a Participation Warrant Agreement, the undersigned
received a warrant to purchase 1,500,000 shares of common stock, par value
$.008 per share (the "Shares"), of priceline.com Incorporated, a Delaware
corporation (the "Company"); and

WHEREAS, the undersigned wishes to receive certain registration rights with
respect to such Shares; and

      WHEREAS, the undersigned has reviewed a copy of that certain Amended
and Restated Registration Rights Agreement, dated as of December 8, 1998
(the "Agreement"), among the Company, General Atlantic Partners 48, L.P.,
GAP Coinvestment Partners, L.P., General Atlantic Partners 50, L.P. and the
stockholders named therein and has been given a copy of the Agreement and
afforded ample opportunity to read and to have counsel review it, and the
undersigned is thoroughly familiar with its terms.

      NOW, THEREFORE, in consideration of the mutual premises contained
herein and in the Agreement and for other good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged, the
undersigned hereby acknowledges and agrees that (i) the undersigned has
been given a copy of the Agreement and afforded ample opportunity to read
and to have counsel review it, and the undersigned is thoroughly familiar
with its terms, (ii) the Shares are subject to terms and conditions set
forth in the Agreement, (iii) the undersigned does hereby agree fully to be
bound by the Agreement as a "Demand Stockholder" (as therein defined), and
upon the execution and delivery of this Acknowledgment and Agreement by the
Company, the undersigned shall have all the rights and obligations under
the Agreement as a Demand Stockholder, and (iv) the undersigned does hereby
name _________________to serve as their representative under the Agreement.

      This 17th day of November, 1999.

Acknowledged and agreed:

PRICELINE.COM INCORPORATED                    U S AIRWAYS, INC.

By:__________________________________         By:___________________________
    Name:                                         Name:
    Title:                                        Title:

[**]=Confidential Treatment requested for redacted portion

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