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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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                                 SCHEDULE TO-T/A
                                 (RULE 14D-100)
         TENDER OFFER STATEMENT PURSUANT TO SECTION 14(d)(1) OR 13(e)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                                 AMENDMENT NO. 1

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                              SIERRACITIES.COM INC.
                       (NAME OF SUBJECT COMPANY (ISSUER))

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                                   AMTRS CORP.
                          A WHOLLY-OWNED SUBSIDIARY OF
                         AMERICAN EXPRESS TRAVEL RELATED
                             SERVICES COMPANY, INC.
                      (NAMES OF FILING PERSONS (OFFERORS))

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                     COMMON STOCK, PAR VALUE $.01 PER SHARE
                         (TITLE OF CLASS OF SECURITIES)

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                                   826521 10 6
                      (CUSIP NUMBER OF CLASS OF SECURITIES)

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                         DAVID S. CARROLL, GROUP COUNSEL
                            AMERICAN EXPRESS COMPANY
                                200 VESEY STREET
                            NEW YORK, NEW YORK 10285
                                 (212) 640-2000
           (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED TO
         RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF FILING PERSONS)

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                                    COPY TO:
                              DOUGLAS P. LONG, ESQ.
                               FAEGRE & BENSON LLP
                             2200 WELLS FARGO CENTER
                             90 SOUTH SEVENTH STREET
                          MINNEAPOLIS, MINNESOTA 55402
                                 (612) 336-3000

                                  MARCH 5, 2001
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                            CALCULATION OF FILING FEE



         Transaction Valuation*                   Amount of Filing Fee
         ----------------------                   --------------------
                                               
              $119,534,953                              $23,907


 *  Estimated for purposes of calculating the amount of filing fee only. This
    calculation assumes the purchase of all outstanding shares of Common Stock,
    par value $.01 per share (the "Shares"), of SierraCities.com Inc. (the
    "Company") at a price per Share of $5.68 in cash, without interest. As of
    February 23, 2001, there were (i) 18,918,640 Shares outstanding and (ii)
    2,126,246 Shares reserved for issuance for outstanding options to acquire
    Shares from the Company. The amount of the filing fee, calculated in
    accordance with Rule 0-11 of the Securities Exchange Act of 1934, is 1/50th
    of one percent of the aggregate transaction value.

[X]  Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
     and identify the filing with which the offsetting fee was previously paid.
     Identify the previous filing by registration statement number, or the Form
     or Schedule and the date of its filing.

    Amount Previously Paid:         $23,907
    Form or Registration No.:       Schedule TO
    Filing Party:                   American Express Travel Related Services
                                        Company, Inc. and AMTRS Corp.
    Date Filed:                     February 27, 2001

[ ]  Check the box if the filing relates solely to preliminary communications
     made before the commencement of a tender offer.

    Check the appropriate boxes below to designate any transactions to which the
    statement relates:

    [X] third-party tender offer subject to Rule 14d-1.

    [ ] issuer tender offer subject to Rule 13e-4.

    [ ] going-private transaction subject to Rule 13e-3.

    [ ]  amendment to Schedule 13D under Rule 13d-2.

    Check the following box if the filing is a final amendment reporting the
    results of the tender offer: [ ]
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                                  TENDER OFFER

    This Amendment No. 1 amends and supplements the Tender Offer Statement on
Schedule TO (the "Schedule TO") filed with the Securities and Exchange
Commission on February 27, 2001, by AMTRS Corp., a Delaware corporation
("Purchaser"), and American Express Travel Related Services Company, Inc., a New
York corporation ("Parent"). The Schedule TO relates to an offer by Purchaser to
purchase all of the issued and outstanding shares of Common Stock, par value
$.01 per share (together with the associated preferred share purchase rights,
the "Shares"), of SierraCities.com Inc., a Delaware corporation (the "Company"),
for a price of $5.68 per Share, net to the seller in cash, without interest,
upon the terms and subject to the conditions set forth in the Offer to Purchase,
dated February 27, 2001 (the "Offer to Purchase"), and in the related Letter of
Transmittal (the "Letter of Transmittal"), copies of which are attached to the
Schedule TO as Exhibits (a)(1) and (a)(2), respectively.

ITEM 11.  ADDITIONAL INFORMATION

     Item 11 of the Schedule TO is hereby amended and supplemented by adding the
following to the end of paragraph (b) of Item 11:

     "On March 5, 2001, American Express Company (the parent company of Parent
     and Purchaser ("American Express")) issued a press release announcing the
     early termination of the waiting period under the Hart-Scott-Rodino
     Antitrust Improvements Act of 1976, as amended. A copy of that press
     release is attached hereto as Exhibit (a)(10) and is incorporated herein by
     reference."

ITEM 12.  MATERIALS TO BE FILED AS EXHIBITS

                           (a)(1)          Offer to Purchase, dated February 27,
                                           2001.*

                           (a)(2)          Letter of Transmittal.*

                           (a)(3)          Form of Notice of Guaranteed
                                           Delivery.*

                           (a)(4)          Form of Letter to Brokers, Dealers,
                                           Commercial Banks, Trust Companies and
                                           Other Nominees.*

                           (a)(5)          Form of Letter to Clients for use by
                                           Brokers, Dealers, Commercial Banks,
                                           Trust Companies and Other Nominees.*

                           (a)(6)          Guidelines for Certification of
                                           Taxpayer Identification Number on
                                           Substitute Form W-9.*

                           (a)(7)          Form of Letter to Participants in
                                           First Sierra 401(k) Plan.*

                           (a)(8)          Text of press release issued by
                                           Parent and the Company, dated
                                           February 14, 2001 (incorporated by
                                           reference to the Tender Offer
                                           Statement on Schedule TO filed by
                                           Parent and Purchaser with the
                                           Securities and Exchange Commission on
                                           February 14, 2001).*

                           (a)(9)          Summary Advertisement as published in
                                           The Wall Street Journal on February
                                           27, 2001.*

                           (a)(10)         Text of press release issued by
                                           American Express on March 5, 2001.+
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                           (d)(1)          Agreement and Plan of Merger, dated
                                           as of February 14, 2001, by and
                                           between the Company, Parent and
                                           Purchaser (incorporated by reference
                                           to Exhibit 2 to American Express' and
                                           Parent's Schedule 13D, filed February
                                           26, 2001.*

                           (d)(2)          Tender Agreement, dated as of
                                           February 14, 2001, by and between
                                           Parent and Depping 1999 Investment
                                           Limited Partnership (incorporated by
                                           reference to Exhibit 3 to American
                                           Express' and Parent's Schedule 13D,
                                           filed February 26, 2001).*

                           (d)(3)          Tender Agreement, dated as of
                                           February 14, 2001, by and between
                                           Parent and Thomas J. Depping
                                           (incorporated by reference to Exhibit
                                           4 to American Express' and Parent's
                                           Schedule 13D, filed February 26,
                                           2001).*

                           (d)(4)          Tender Agreement, dated as of
                                           February 14, 2001, by and between
                                           Parent and Sandy B. Ho (incorporated
                                           by reference to Exhibit 5 to American
                                           Express' and Parent's Schedule 13D,
                                           filed February 26, 2001).*

                           (d)(5)          Tender Agreement, dated as of
                                           February 14, 2001, by and between
                                           Parent and Redstone Group, Ltd.
                                           (incorporated by reference to Exhibit
                                           6 to American Express' and Parent's
                                           Schedule 13D, filed February 26,
                                           2001).*

                           (d)(6)          Tender Agreement, dated as of
                                           February 14, 2001, by and between
                                           Parent and David C. Shindeldecker
                                           (incorporated by reference to Exhibit
                                           7 to American Express' and Parent's
                                           Schedule 13D, filed February 26,
                                           2001).*

                           (d)(7)          Tender Agreement, dated as of
                                           February 14, 2001, by and between
                                           Parent and David L. Solomon
                                           (incorporated by reference to Exhibit
                                           8 to American Express' and Parent's
                                           Schedule 13D, filed February 26,
                                           2001).*

                           (d)(8)          Letter Agreement (Confidentiality
                                           Agreement), dated as of June 9, 2000,
                                           by and between the Company and
                                           Parent.*

                              (g)          Not applicable.

                              (h)          Not applicable.

- --------------------------
* Previously filed.
+ Filed herewith.
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                                    SIGNATURE

    After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.

Date:  March 5, 2001

                                        AMERICAN EXPRESS TRAVEL RELATED
                                        SERVICES COMPANY, INC.

                                        By: /s/ BRADLEY ALEXANDER
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                                            Bradley Alexander
                                            Vice President, Finance, Small
                                            Business Services

                                        AMTRS CORP.

                                        By: /s/ BRADLEY ALEXANDER
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                                            Bradley Alexander
                                            Vice President and Treasurer