EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of United Parcel Service, Inc. on Form S-3 of our report dated January 29, 2002 (which report expresses an unqualified opinion and includes an explanatory paragraph relating to the Company's change in its method of accounting for derivative instruments and hedging activities to conform with Statement of Financial Accounting Standards No. 133, as amended), appearing in the Annual Report on Form 10-K of United Parcel Service, Inc. for the year ended December 31, 2001 and to the reference to us under the heading "Experts" in the Prospectus, which is part of this Registration Statement. DELOITTE & TOUCHE LLP Atlanta, GA April 17, 2002