<PAGE>   1
                                                                EXHIBIT 4(A)(6)


                          TRUST SUPPLEMENT NO. 2000-1B

                         Dated as of November 16, 2000

                                    between

                             DELTA AIR LINES, INC.

                                      and

              STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                             NATIONAL ASSOCIATION,

                                  as Trustee,

                                       To

                          PASS THROUGH TRUST AGREEMENT
                         Dated as of November 16, 2000



                Delta Air Lines, Inc. Pass Through Trust 2000-1B
                             7.920% Delta Air Lines
                           Pass Through Certificates,
                                 Series 2000-1B



<PAGE>   2

                          TRUST SUPPLEMENT NO. 2000-1B

                  This TRUST SUPPLEMENT NO. 2000-1B, dated as of November 16,
2000 (the "Trust Supplement"), between DELTA AIR LINES, INC., a Delaware
corporation, and STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT, NATIONAL
ASSOCIATION, a national banking association, as Trustee, to the Pass Through
Trust Agreement, dated as of November 16, 2000, between the Company (such term
and other capitalized terms used herein without definition being defined as
provided in Section 1.01) and the Trustee (the "Basic Agreement").


                              W I T N E S S E T H:

                  WHEREAS, the Basic Agreement, which is unlimited as to the
aggregate face amount of Certificates that may be issued and authenticated
thereunder, has heretofore or concurrently herewith been executed and
delivered;

                  WHEREAS, the Company is the Owner of 44 aircraft described in
Schedule II (collectively, the "Aircraft");

                  WHEREAS, pursuant to each Indenture, the Company will issue
the Equipment Notes, which Equipment Notes are to be secured by a security
interest in all right, title and interest of the Company in and to the Aircraft
and certain other property described therein;

                  WHEREAS, the Trustee shall hereby declare the creation of the
Class B Trust (as defined below) for the benefit of Holders of the Class B
Certificates (as defined below) to be issued in respect of such Class B Trust,
and the initial Holders of the Class B Certificates, as grantors of such Class
B Trust, by their respective acceptances of the Class B Certificates, shall
join in the creation of the Class B Trust with the Trustee;

                  WHEREAS, all Certificates to be issued by the Class B Trust
will evidence Fractional Undivided Interests in the Class B Trust and will have
no rights, benefits or interests in respect of any other separate Trust or the
property held therein;

                  WHEREAS, pursuant to the terms and conditions of the Basic
Agreement, as supplemented by this Trust Supplement and the Participation
Agreements, the Trustee on behalf of the Class B Trust shall purchase the
Equipment Notes issued by the Company pursuant to the Indentures relating to
the Aircraft having the identical interest rate as, and final maturity dates
not later than the final Regular Distribution Date of, the Class B Certificates
issued hereunder and shall hold such Equipment Notes in trust for the benefit
of the Class B Certificateholders;

                  WHEREAS, pursuant to the terms and conditions of the
Intercreditor Agreement referred to in Section 3.01(h) hereof (the
"Intercreditor Agreement"), the Trustee and the other parties thereto will
agree to the terms of subordination set forth therein;

                  WHEREAS, all of the conditions and requirements necessary to
make this Trust Supplement, when duly executed and delivered, a valid, binding
and legal instrument in accordance with its terms and for the purposes herein
expressed, have been done, performed and


<PAGE>   3

fulfilled, and the execution and delivery of this Trust Supplement in the form
and with the terms hereof have been in all respects duly authorized;

                  WHEREAS, this Trust Supplement is subject to the provisions
of the Trust Indenture Act and shall, to the extent applicable, be governed by
such provisions;

                  NOW THEREFORE, in consideration of the mutual agreements
herein contained, and of other good and valuable consideration the receipt and
adequacy of which are hereby acknowledged, the parties hereto agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

                  Section 1.01      Definitions. Unless otherwise specified
herein or the context otherwise requires, capitalized terms used but not
defined herein shall have the respective meanings set forth, and shall be
construed and interpreted in the manner described, in the Basic Agreement or,
to the extent not defined therein, in the Intercreditor Agreement.

                                  ARTICLE II

                              DECLARATION OF TRUST

                  Section 2.01      Declaration of Trust. The Trustee hereby
declares the creation of a Trust, designated the "Delta Air Lines Pass Through
Trust 2000-1B" (the "Class B Trust"), for the benefit of the Holders of the
Class B Certificates to be issued in respect of such Class B Trust, and the
initial Holders of the Class B Certificates, as grantors of such Class B Trust,
by their respective acceptances of the Class B Certificates, join in the
creation of such Class B Trust with the Trustee. The Trustee, by the execution
and delivery of this Trust Supplement, acknowledges its acceptance of all
right, title and interest in and to the Trust Property to be acquired pursuant
to Section 2.02 of the Basic Agreement and the Participation Agreements and the
Trustee will hold such right, title and interest for the benefit of all present
and future Holders of the Class B Certificates, upon the trusts set forth in
the Basic Agreement and this Trust Supplement.

                                  ARTICLE III

                                THE CERTIFICATES

                  Section 3.01      The Certificates. There is hereby created a
series of Certificates to be issued under this Agreement designated as "7.920%
Delta Air Lines Pass Through Certificates, Series 2000-1B" (the "Class B
Certificates"). Each Class B Certificate represents a Fractional Undivided
Interest in the Class B Trust created hereby. The Class B Certificates shall be
the only instruments evidencing a Fractional Undivided Interest in the Class B
Trust.


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                  The terms and conditions applicable to the Class B
Certificates and the Class B Trust are as follows:

                  (a)      The aggregate face amount of the Class B Certificates
         that may be authenticated and delivered under this Agreement (except
         for Class B Certificates authenticated and delivered upon registration
         of transfer of, or in exchange for, or in lieu of, other Class B
         Certificates pursuant to Sections 3.03, 3.04, 3.05 and 3.06 of the
         Basic Agreement) is $182,497,000.

                  (b)      The Cut-off Date is December 16, 2000.

                  (c)      The Regular Distribution Dates with respect to any
         payment of Scheduled Payments means May 18 and November 18 of each
         year, commencing on May 18, 2001, until payment of all of the
         Scheduled Payments to be made under the Equipment Notes has been made.
         The entire principal amount of the Equipment Notes to be held by the
         Class B Trust is scheduled for payment on November 18, 2010.

                  (d)      The Special Distribution Dates with respect to the
         Class B Certificates means any Business Day on which a Special Payment
         is to be distributed pursuant to this Agreement.

                  (e)      The Class B Certificates shall be in the form
         attached hereto as Exhibit A, shall be Book-Entry Certificates and
         shall be subject to the conditions set forth in the Letter of
         Representations between the Company and The Depository Trust Company,
         as initial Clearing Agency, attached hereto as Exhibit B.

                  (f)      The proceeds of the Class B Certificates issued by
         the Class B Trust shall be used to acquire the Equipment Notes
         described in Schedule I, such Equipment Notes to relate to the
         Aircraft described in Schedule II and the Note Documents described in
         Schedule III.

                  (g)      Any Person acquiring or accepting a Class B
         Certificate or an interest therein will, by such acquisition or
         acceptance, be deemed to represent and warrant to the Company, the
         Loan Trustees and the Trustee that either (i) no assets of an employee
         benefit plan subject to Title I of ERISA, or of an employee benefit
         plan or an individual retirement account subject to Section 4975 of
         the Internal Revenue Code of 1986, as amended (the "Code"), or any
         trust established under such plan or account, have been used to
         purchase Class B Certificates or an interest therein or (ii) the
         purchase and holding of Class B Certificates or interests therein by
         such Person is exempt from the prohibited transaction restrictions of
         ERISA and the Code pursuant to one or more prohibited transaction
         statutory or administrative exemptions.

                  (h)      The Class B Certificates will be subject to the
         following Intercreditor Agreement (and to the extent the terms thereof
         (including the definitions of defined terms) are inconsistent with the
         terms of this Agreement, such Intercreditor Agreement shall control):
         that certain Intercreditor Agreement, dated as of November 16, 2000,
         among State Street Bank and Trust Company of Connecticut, National
         Association, as Trustee under each Trust (as defined therein),
         Westdeutsche Landesbank Girozentrale,


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         acting through its New York Branch, as Class A-1 Liquidity Provider,
         Class A-2 Liquidity Provider, Class B Liquidity Provider and Class C
         Liquidity Provider, and State Street Bank and Trust Company of
         Connecticut, National Association, as Subordination Agent thereunder.
         Potential Purchasers shall have the rights upon the occurrence of a
         Triggering Event set forth in Article IV hereof. The Trustee and, by
         acceptance of any Class B Certificate, each Certificateholder thereof,
         agrees to be bound by all of the provisions of the Intercreditor
         Agreement, including the subordination provisions of Section 9.09
         thereof.

                  (i)      The Class B Certificates will have the benefit of the
         following Liquidity Facility: that certain Revolving Credit Agreement,
         dated as of November 16, 2000, between State Street Bank and Trust
         Company of Connecticut, National Association, as Subordination Agent
         under the Intercreditor Agreement, as agent and trustee for the Class
         B Trust, and Westdeutsche Landesbank Girozentrale, acting through its
         New York Branch.

                  (j)      Subject to Section 2.02(b) of the Basic Agreement,
         there will not be any deposit agreement, escrow agreement or other
         similar arrangement prior to delivery of the Aircraft.

                  (k)      The Company may at any time purchase any of the Class
         B Certificates at any price in the open market and may hold such Class
         B Certificates to maturity.

                  (l)      The Responsible Party is the Company.

                  Section 3.02      Delivery of Documents. The Trustee is hereby
directed (i) to execute and deliver the Intercreditor Agreement referred to in
Section 3.01(h) of this Trust Supplement in the form delivered to the Trustee
by the Company and (ii) subject to the respective terms thereof, to perform its
obligations thereunder.

                                  ARTICLE IV

                                    DEFAULT

                  Section 4.01      Purchase Rights of Certificateholders. (a)
By acceptance of its Class B Certificate, each Class B Certificateholder agrees
that at any time after the occurrence and during the continuation of a
Triggering Event,

                  (i)      each Class B Certificateholder shall have the right
         (which shall not expire upon any purchase of the Class A-1
         Certificates pursuant to the Class A-2 Trust Agreement or the Class
         A-2 Certificates pursuant to the Class A-1 Trust Agreement) to
         purchase, for the purchase price set forth in the Class A-1 Trust
         Agreement and the Class A-2 Trust Agreement, respectively, all, but
         not less than all, of the Class A-1 Certificates and the Class A-2
         Certificates upon ten days' prior written notice to the Class A-1
         Trustee, the Class A-2 Trustee and each other Class B
         Certificateholder, provided that (A) if prior to the end of such
         ten-day period any other Class B Certificateholder notifies such
         purchasing Class B Certificateholder that such other


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         Class B Certificateholder wants to participate in such purchase, then
         such other Class B Certificateholder may join with the purchasing
         Class B Certificateholder to purchase all, but not less than all, of
         the Class A-1 Certificates and the Class A-2 Certificates pro rata
         based on the Fractional Undivided Interest in the Class B Trust held
         by each such Class B Certificateholder and (B) if prior to the end of
         such ten-day period any other Class B Certificateholder fails to
         notify the purchasing Class B Certificateholder of such other Class B
         Certificateholder's desire to participate in such a purchase, then
         such other Class B Certificateholder shall lose its right to purchase
         the Class A-1 Certificates and the Class A-2 Certificates pursuant to
         this Section 4.01(a)(i); and

                  (ii)     each Class C Certificateholder shall have the right
         (which shall not expire upon any purchase of the Class A-1
         Certificates pursuant to the Class A-2 Trust Agreement or the Class
         A-2 Certificates pursuant to the Class A-1 Agreement or the Class A-1
         Certificates and Class A-2 Certificates pursuant to clause (i) above)
         to purchase all, but not less than all, of the Class A-1 Certificates,
         the Class A-2 Certificates and the Class B Certificates upon ten days'
         prior written notice to the Class A-1 Trustee, the Class A-2 Trustee,
         the Trustee and each other Class C Certificateholder, provided that
         (A) if prior to the end of such ten-day period any other Class C
         Certificateholder notifies such purchasing Class C Certificateholder
         that such other Class C Certificateholder wants to participate in such
         purchase, then such other Class C Certificateholder may join with the
         purchasing Class C Certificateholder to purchase all, but not less
         than all, of the Class A-1 Certificates, the Class A-2 Certificates
         and the Class B Certificates pro rata based on the Fractional
         Undivided Interest in the Class C Trust held by each such Class C
         Certificateholder and (B) if prior to the end of such ten-day period
         any other Class C Certificateholder fails to notify the purchasing
         Class C Certificateholder of such other Class C Certificateholder's
         desire to participate in such a purchase, then such other Class C
         Certificateholder shall lose its right to purchase the Class A-1
         Certificates, the Class A-2 Certificates and the Class B Certificates
         pursuant to this Section 4.01(a)(ii); and

                  (iii)    each Class D Certificateholder (if Class D
         Certificates are issued) shall have the right (which shall not expire
         upon any purchase of the Class A-1 Certificates pursuant to the Class
         A-2 Trust Agreement, the Class A-2 Certificates pursuant to the Class
         A-1 Trust Agreement or the Class A-1 Certificates, Class A-2
         Certificates or Class B Certificates pursuant to clause (i) or (ii)
         above) to purchase all, but not less than all, of the Class A-1
         Certificates, the Class A-2 Certificates, the Class B Certificates and
         the Class C Certificates upon ten days' prior written notice to the
         Class A-1 Trustee, the Class A-2 Trustee, the Trustee, the Class C
         Trustee and each other Class D Certificateholder, provided that (A) if
         prior to the end of such ten-day period any other Class D
         Certificateholder notifies such purchasing Class D Certificateholder
         that such other Class D Certificateholder wants to participate in such
         purchase, then such other Class D Certificateholder may join with the
         purchasing Class D Certificateholder to purchase all, but not less
         than all, of the Class A-1 Certificates, the Class A-2 Certificates,
         the Class B Certificates and the Class C Certificates pro rata based
         on the Fractional Undivided Interest in the Class D Trust held by each
         such Class D Certificateholder and (B) if prior to the end of such
         ten-day period any other Class D Certificateholder fails to notify the
         purchasing Class D Certificateholder of such other


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         Class D Certificateholder's desire to participate in such a purchase,
         then such other Class D Certificateholder shall lose its right to
         purchase the Class A-1 Certificates, the Class A-2 Certificates, the
         Class B Certificates and the Class C Certificates pursuant to this
         Section 4.01(a)(iii).

                  The purchase price with respect to the Class B Certificates
shall be equal to the Pool Balance of the Class B Certificates, together with
accrued and unpaid interest in respect thereof to the date of such purchase,
without premium, but including any other amounts then due and payable to the
Class B Certificateholders under this Agreement, the Intercreditor Agreement or
any Note Document or on or in respect of the Class B Certificates; provided,
however, that if such purchase occurs after the Record Date relating to any
Distribution Date, such purchase price shall be reduced by the amount to be
distributed hereunder on such related Distribution Date (which deducted amounts
shall remain distributable to, and may be retained by, the Class B
Certificateholders as of such Record Date); provided, further that no such
purchase of Class B Certificates pursuant to this Section 4.01(a) shall be
effective unless the purchaser(s) shall certify to the Trustee that
contemporaneously with such purchase, such purchaser(s) is purchasing, pursuant
to the terms of this Agreement and the Intercreditor Agreement, all of the
Class A-1 Certificates, the Class A-2 Certificates, the Class B Certificates
and the Class C Certificates that are senior to the securities held by such
purchaser(s). Each payment of the purchase price of the Class B Certificates
referred to in the first sentence hereof shall be made to an account or
accounts designated by the Trustee and each such purchase shall be subject to
the terms of this Section 4.01(a). Each Class B Certificateholder agrees by its
acceptance of its Certificate that it will, upon payment from such Class C
Certificateholder(s) or Class D Certificateholder(s), as the case may be, of
the purchase price set forth in the first sentence of this paragraph, forthwith
sell, assign, transfer and convey to the purchaser(s) thereof (without
recourse, representation or warranty of any kind except as to its own acts) all
of the right, title, interest and obligation of such Class B Certificateholder
in this Agreement, the Intercreditor Agreement, the Liquidity Facility, the
Note Documents and all Class B Certificates held by such Class B
Certificateholder (excluding all right, title and interest under any of the
foregoing to the extent such right, title or interest is with respect to an
obligation not then due and payable as respects any action or inaction or state
of affairs occurring prior to such sale) and the purchaser(s) shall assume all
of such Class B Certificateholder's obligations under this Agreement, the
Intercreditor Agreement, the Liquidity Facility, the Note Documents and all
such Class B Certificates. The Class B Certificates will be deemed to be
purchased on the date payment of the purchase price is made notwithstanding the
failure of any Class B Certificateholder to deliver any Class B Certificate
and, upon such a purchase, (i) the only rights of the Class B
Certificateholders will be to deliver the Class B Certificates and (ii) if the
purchaser(s) shall so request, each such Class B Certificateholder will comply
with all the provisions of Section 3.04 of the Basic Agreement to enable new
Class B Certificates to be issued to the purchaser(s) in such denominations as
it shall request. All charges and expenses in connection with the issuance of
any such new Class B Certificates shall be borne by the purchaser(s) thereof.

                  As used in this Section 4.01(a), the terms "Class A-1
Certificate", "Class A-1 Certificateholder", " Class A-1 Trust", " Class A-1
Trust Agreement", " Class A-1 Trustee", "Class A-2 Certificate", "Class A-2
Certificateholder", "Class A-2 Trust", "Class A-2 Trust Agreement", "Class A-2
Trustee", "Class B Certificateholder", "Class C Certificate", "Class C
Certificateholder", "Class C Trust", "Class C Trustee", "Class D Certificate",
"Class D


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Certificateholder", "Class D Trust" and "Class D Trustee" shall have the
respective meanings assigned to such terms in the Intercreditor Agreement.

                  (b) This Section 4.01 supplements and, to the extent
inconsistent with any provision of Section 6.01(a) of the Basic Agreement,
replaces the provisions of Section 6.01(a) of the Basic Agreement.
Notwithstanding anything to the contrary set forth herein or in any Operative
Agreement, the provisions of this Section 4.01 may not be amended in any manner
without the consent of each Class A-1 Certificateholder, Class A-2
Certificateholder, Class B Certificateholder, Class C Certificateholder or Class
D Certificateholder, if any, that would be adversely affected thereby.

                                   ARTICLE V

                            MISCELLANEOUS PROVISIONS

                  Section 5.01      Final Termination Date. The respective
obligations and responsibilities of the Company and the Trustee created hereby
and the Class B Trust created hereby shall terminate upon the distribution to
all Certificateholders of Class B Certificates and the Trustee of all amounts
required to be distributed to them pursuant to this Agreement and the
disposition of all property held as part of the Trust Property; provided,
however, that in no event shall the Trust created hereby continue beyond the
expiration of 21 years from the death of the last survivor of the descendants
of Joseph P. Kennedy, Sr., the father of John F. Kennedy, former President of
the United States, living on the date of this Trust Supplement.

                  Section 5.02      Basic Agreement Ratified. Except and so far
as herein expressly provided, all of the provisions, terms and conditions of
the Basic Agreement are in all respects ratified and confirmed; and the Basic
Agreement and this Trust Supplement shall be taken, read and construed as one
and the same instrument.

                  Section 5.03      Governing Law. THIS AGREEMENT HAS BEEN
DELIVERED IN THE STATE OF NEW YORK AND THIS AGREEMENT AND THE CLASS B
CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF
THE STATE OF NEW YORK, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND
PERFORMANCE, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER
AND THEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

                  Section 5.04      Counterparts. This Trust Supplement may be
executed in any number of counterparts (and each of the parties shall not be
required to execute the same counterpart). Each counterpart of this Trust
Supplement including a signature page or pages executed by each of the parties
hereto shall be an original counterpart of this Trust Supplement, but all of
such counterparts together shall constitute one instrument.

                  Section 5.05      Intention of Parties. The parties hereto
intend that the Class B Trust be classified for United States federal income
tax purposes as a grantor trust under Part 1E of Chapter 1J of Subtitle A of
the Internal Revenue Code of 1986, as amended, and not as a trust or
association taxable as a corporation or as a partnership. Each
Certificateholder of a Class B


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Certificate, by its acceptance of its Class B Certificate or a beneficial
interest therein, agrees to treat the Class B Trust as a grantor trust for all
United States federal, state and local income tax purposes. The Trustee shall
not be authorized or empowered to do anything that would cause the Class B
Trust to fail to qualify as a grantor trust for such tax purposes (including as
subject to this restriction, acquiring any Aircraft by bidding the Equipment
Notes relating thereto or otherwise, or taking any action with respect to any
such Aircraft once acquired).


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<PAGE>   10

                  IN WITNESS WHEREOF, the parties have caused this Trust
Supplement to be duly executed by their respective officers thereto duly
authorized as of the date first written above.


                                    DELTA AIR LINES, INC.


                                    By:
                                       ---------------------------------------
                                       Name:
                                       Title:



                                    STATE STREET BANK AND TRUST
                                    COMPANY OF CONNECTICUT, NATIONAL
                                    ASSOCIATION,
                                    as Trustee


                                    By:
                                       ---------------------------------------
                                       Name:
                                       Title:


<PAGE>   11

                                  EXHIBIT A to
                          TRUST SUPPLEMENT NO. 2000-1B

                              FORM OF CERTIFICATE

                  *Unless this Certificate is presented by an authorized
representative of The Depository Trust Company, a New York corporation ("DTC"),
to Issuer or its agent for registration of transfer, exchange or payment, and
any Certificate issued is registered in the name of Cede & Co. or in such other
name as is requested by an authorized representative of DTC (and any payment is
made to Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner
hereof, Cede & Co., has an interest herein.

                  DELTA AIR LINES, INC. PASS THROUGH TRUST 2000-1B

        7.920% DELTA AIR LINES PASS THROUGH CERTIFICATE, SERIES 2000-1B

                  Final Expected Regular Distribution Date: November 18, 2010

                           evidencing a fractional undivided interest in a
                           Trust, the property of which includes or will
                           include, among other things, certain Equipment Notes
                           each secured by an Aircraft owned by Delta Air
                           Lines, Inc.

<TABLE>
<S>                        <C>                                       <C>
Certificate No. ______     $____________ Fractional Undivided        CUSIP No.
                           Interest representing .000547954% of      247367 AQ8
                           the Trust per $1,000 face amount
</TABLE>

                  THIS CERTIFIES THAT ________, for value received, is the
registered owner of a $______ (______ dollars) Fractional Undivided Interest in
the Delta Air Lines Pass Through Trust, Series 2000-1B (the "Trust") created by
STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT, NATIONAL ASSOCIATION, as
trustee (the "Trustee"), pursuant to a Pass Through Trust Agreement, dated as
of November 16, 2000 (the "Basic Agreement"), as supplemented by Trust
Supplement No. 2000-1B thereto dated November 16, 2000 (collectively, the
"Agreement"), between the Trustee and Delta Air Lines, Inc., a corporation
incorporated under Delaware law (the "Company"), a summary of certain of the
pertinent provisions of which is set forth below. To the extent not otherwise
defined herein, the capitalized terms used herein have the meanings assigned to
them in the Agreement. This Certificate is one of the duly authorized
Certificates designated as "7.920% Delta Air Lines Pass Through Certificates,
Series 2000-1B" (herein called the "Certificates"). This Certificate is issued
under and is subject to the terms, provisions and conditions of the Agreement.
By virtue of its acceptance hereof, the Certificateholder of this Certificate
assents to and agrees to be bound by all of the provisions of the Agreement and
the Intercreditor Agreement, including the



--------
* This legend to appear on Book-Entry Certificates to be deposited with The
Depository Trust Company.


<PAGE>   12

subordination provisions of Section 9.09 of the Intercreditor Agreement. The
property of the Trust includes or will include certain Equipment Notes and all
rights of the Trust and the Trustee, on behalf of the Trust, to receive any
payments under the Intercreditor Agreement or the Liquidity Facility (the
"Trust Property"). Each issue of the Equipment Notes is or will be secured by,
among other things, a security interest in certain Aircraft owned by the
Company.

                  The Certificates represent Fractional Undivided Interests in
the Trust and the Trust Property, and will have no rights, benefits or interest
in respect of any other separate trust established pursuant to the terms of the
Basic Agreement for any other series of certificates issued pursuant thereto.

                  Subject to and in accordance with the terms of the Agreement
and the Intercreditor Agreement, from funds then available to the Trustee,
there will be distributed on each May 18 and November 18 (a "Regular
Distribution Date"), commencing on May 18, 2001, to the Person in whose name
this Certificate is registered at the close of business on the 15th day
preceding the Regular Distribution Date, an amount in respect of the Scheduled
Payments on the Equipment Notes due on such Regular Distribution Date, the
receipt of which has been confirmed by the Trustee, equal to the product of the
percentage interest in the Trust evidenced by this Certificate and an amount
equal to the sum of such Scheduled Payments. Subject to and in accordance with
the terms of the Agreement and the Intercreditor Agreement, in the event that
Special Payments on the Equipment Notes are received by the Trustee, from funds
then available to the Trustee, there shall be distributed on the applicable
Special Distribution Date, to the Person in whose name this Certificate is
registered at the close of business on the 15th day preceding the Special
Distribution Date, an amount in respect of such Special Payments on the
Equipment Notes, the receipt of which has been confirmed by the Trustee, equal
to the product of the percentage interest in the Trust evidenced by this
Certificate and an amount equal to the sum of such Special Payments so
received. If a Regular Distribution Date or Special Distribution Date is not a
Business Day, distribution shall be made on the immediately following Business
Day with the same force and effect as if made on such Regular Distribution Date
or Special Distribution Date and no interest shall accrue during the
intervening period. The Trustee shall mail notice of each Special Payment and
the Special Distribution Date therefor to the Certificateholder of this
Certificate.

                  Distributions on this Certificate will be made by the Trustee
by check mailed to the Person entitled thereto, without the presentation or
surrender of this Certificate or the making of any notation hereon, except that
with respect to Certificates registered on the Record Date in the name of a
Clearing Agency (or its nominee), such distributions shall be made by wire
transfer. Except as otherwise provided in the Agreement and notwithstanding the
above, the final distribution on this Certificate will be made after notice
mailed by the Trustee of the pendency of such distribution and only upon
presentation and surrender of this Certificate at the office or agency of the
Trustee specified in such notice.

                  The Certificates do not represent a direct obligation of, or
an obligation guaranteed by, or an interest in, the Company, the Trustee or any
Loan Trustee or any Affiliate thereof. The Certificates are limited in right of
payment, all as more specifically set forth on the face hereof and in the
Agreement. All payments or distributions made to Certificateholders under the
Agreement shall be made only from the Trust Property and only to the extent
that the


                                      A-2
<PAGE>   13

Trustee shall have sufficient income or proceeds from the Trust Property to
make such payments in accordance with the terms of the Agreement. Each
Certificateholder of this Certificate, by its acceptance hereof, agrees that it
will look solely to the income and proceeds from the Trust Property to the
extent available for any payment or distribution to such Certificateholder
pursuant to the terms of the Agreement and that it will not have any recourse
to the Company, the Trustee or the Loan Trustees except as otherwise expressly
provided in the Agreement, in any Note Document or in the Intercreditor
Agreement. This Certificate does not purport to summarize the Agreement and
reference is made to the Agreement for information with respect to the
interests, rights, benefits, obligations, proceeds and duties evidenced hereby.
A copy of the Agreement may be examined during normal business hours at the
principal office of the Trustee, and at such other places, if any, designated
by the Trustee, by any Certificateholder upon request.

                  The Agreement permits, with certain exceptions therein
provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights of the Certificateholders under the
Agreement at any time by the Company and the Trustee with the consent of the
Certificateholders holding Certificates evidencing Fractional Undivided
Interests aggregating not less than a majority in interest in the Trust. Any
such consent by the Certificateholder of this Certificate shall be conclusive
and binding on such Certificateholder and upon all future Certificateholders of
this Certificate and of any Certificate issued upon the transfer hereof or in
exchange hereof or in lieu hereof whether or not notation of such consent is
made upon this Certificate. The Agreement also permits the amendment thereof,
in certain limited circumstances, without the consent of the Certificateholders
of any of the Certificates.

                  As provided in the Agreement and subject to certain
limitations set forth therein, the transfer of this Certificate is registrable
in the Register upon surrender of this Certificate for registration of transfer
at the offices or agencies maintained by the Trustee in its capacity as
Registrar, or by any successor Registrar duly endorsed or accompanied by a
written instrument of transfer in form satisfactory to the Trustee and the
Registrar, duly executed by the Certificateholder hereof or such
Certificateholder's attorney duly authorized in writing, and thereupon one or
more new Certificates of authorized denominations evidencing the same aggregate
Fractional Undivided Interest in the Trust will be issued to the designated
transferee or transferees.

                  The Certificates are issuable only as registered Certificates
without coupons in minimum denominations of $1,000 Fractional Undivided
Interest and integral multiples thereof except that one Certificate may be
issued in a different denomination. As provided in the Agreement and subject to
certain limitations therein set forth, the Certificates are exchangeable for
new Certificates of authorized denominations evidencing the same aggregate
Fractional Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.

                  No service charge will be made for any such registration of
transfer or exchange, but the Trustee shall require payment of a sum sufficient
to cover any tax or governmental charge payable in connection therewith.

                  The Company, the Trustee, the Registrar and any Paying Agent
shall deem and treat the person in whose name this Certificate is registered as
the owner hereof for all purposes,


                                      A-3
<PAGE>   14

and none of the Company, the Trustee, the Registrar or any such agent shall be
affected by any notice to the contrary.

                  The obligations and responsibilities created by the Agreement
and the Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant
to the Agreement and the disposition of all property held as part of the Trust
Property.

                  Any Person acquiring or accepting this Certificate or an
interest herein will, by such acquisition or acceptance, be deemed to represent
and warrant to the Company, the Loan Trustees and the Trustee that either: (i)
no assets of an employee benefit plan subject to Title I of the Employee
Retirement Income Security Act of 1974, as amended ("ERISA"), or of an employee
benefit plan or an individual retirement account subject to Section 4975 of the
Internal Revenue Code of 1986, as amended (the "Code"), or any trust
established under such plan or account, have been used to purchase this
Certificate or an interest herein or (ii) the purchase and holding of this
Certificate or interest herein by such Person are exempt from the prohibited
transaction restrictions of ERISA and the Code pursuant to one or more
prohibited transaction statutory or administrative exemptions.

                  THIS CERTIFICATE AND THE AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, INCLUDING ALL
MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE, AND THE OBLIGATIONS, RIGHTS
AND REMEDIES OF THE PARTIES AND CERTIFICATEHOLDERS HEREUNDER AND THEREUNDER
SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

                  Unless the certificate of authentication hereon has been
executed by the Trustee, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


                                      A-4
<PAGE>   15


                  IN WITNESS WHEREOF, the Trustee has caused this Certificate
to be duly executed.

                           DELTA AIR LINES, INC. PASS THROUGH
                           TRUST 2000-1B


                           By:  STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT,
                                NATIONAL ASSOCIATION,
                                as Trustee


                           By:
                              ---------------------------------------------
                              Title:
Dated:



              FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

                  This is one of the Certificates referred to in the
within-mentioned Agreement.



                           STATE STREET BANK AND TRUST
                           COMPANY OF CONNECTICUT, NATIONAL
                           ASSOCIATION,
                           as Trustee


                           By:
                              ---------------------------------------------
                              Authorized Officer



                                      A-5
<PAGE>   16

                                  EXHIBIT B to
                          TRUST SUPPLEMENT NO. 2000-1B


                        [DTC Letter of Representations]







<PAGE>   17

                                 SCHEDULE I to
                          TRUST SUPPLEMENT NO. 2000-1B


                                EQUIPMENT NOTES,
                        PRINCIPAL AMOUNTS AND MATURITIES


<TABLE>
<CAPTION>
         EQUIPMENT NOTES           PRINCIPAL AMOUNT                   MATURITY
         ---------------           ----------------                   --------
         <S>                       <C>                                <C>



</TABLE>

<PAGE>   18

                                 SCHEDULE II to
                          TRUST SUPPLEMENT NO. 2000-1B

                                    AIRCRAFT

<TABLE>
<CAPTION>
AIRCRAFT TYPE                                      REGISTRATION NUMBER
-------------                                      -------------------
<S>                                                <C>



</TABLE>



<PAGE>   19

                                SCHEDULE III to
                          TRUST SUPPLEMENT NO. 2000-1B


                                 NOTE DOCUMENTS

<TABLE>
<CAPTION>
                                         AIRCRAFT
                                       REGISTRATION
         AIRCRAFT                         NUMBER                NOTE DOCUMENTS
         --------                      ------------             --------------
         <S>                           <C>                      <C>



</TABLE>