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MileagePlus customer service

Transfer Miles between MileagePlus and OnePass accounts
If you have both a MileagePlus and OnePass account, you can now combine your miles and earn awards faster.
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Contact MileagePlus
MileagePlus customer service
Contact us if you'd like to:
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Get help with your MileagePlus account
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Find your MileagePlus number (find online)
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Join MileagePlus (online form)
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Update your MileagePlus account contact information (update online)
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Request mileage credit (learn more)
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Inquiries related to linking your MileagePlus and One Pass accounts (learn more)
Get help online
Contact us via email
See answers to frequently asked questions
7 AM - 12 AM (CST), 7 days a week
Call from the U.S. or Canada 1-800-421-4655
To call from outside the U.S. or Canada, see contact information for specific country contacts or contact US customer service at 1-605-399-2411 (standard rates apply)
Contact us by mail
MileagePlus
P.O. Box 6120
Rapid City, SD 57709-6120
USA
Contact us by fax
1-605-341-6140
Technical support
Contact us if you:
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Need help with our website
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If you booked on another website, please contact them directly
24 hours a day, 7 days a week
Technical support 1-800-589-5582
Reservations using award miles
Flights with United® or United Express®
Contact us if you'd like to:
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Book a flight with award miles - fee applies* (no fee to book online)
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Change your reservation
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Upgrade with award miles (request online)
*Note: We charge a non-refundable fee of $25 per ticket to book by phone and $30 to issue a ticket at a United counter.
24 hours a day, 7 days a week
Call from the U.S. or Canada 1-800-United-1
(1-800-864-8331)
Spanish 1-800-426-5561
Japanese, Korean, Mandarin and Cantonese 1-800-426-5560
Hearing Impaired Assistance TTD 1-800-323-0170
To call from outside the U.S. or Canada, see contact information for specific country contacts or contact US customer service at 1-605-399-2411 (standard rates apply)
Flights with Star Alliance® airline partners
Contact us if you’d like to:
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Book a flight-fee applies*
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Change your reservation
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Upgrade with award miles
*Note: We charge a non–refundable fee of $25 per ticket to book by phone and $30 to issue a ticket at a United counter.
24 hours a day, 7 days a week
Call from the U.S. or Canada 1-800-United-1
(1-800-864-8331)
To call from outside the U.S. or Canada, see contact information for specific country contacts or contact US customer service at 1-605-399-2411 (standard rates apply)
Flights with other airline partners
Contact us if you’d like to:
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Book a flight–fee applies*
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Change your reservation
*Note: We charge a non–refundable fee of $25 per ticket to book by phone and $30 to issue a ticket at a United counter.
24 hours a day, 7 days a week
Call from the U.S. or Canada 1-800-United-1
(1-800-864-8331)
To call from outside the U.S. or Canada, see contact information for specific country contacts or contact US customer service at 1-605-399-2411 (standard rates apply)
Hotel & Car Awards
Contact us after booking if you’d like to:
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Change your reservation
Note: Hotel and car awards must be booked online
8 A.M.– 8 P.M. (CST) Mon–Fri, 8 A.M. - 4 P.M. Sat
Call from the U.S. or Canada
U.S. 1-800-201-5741
Canada 1-800-201-5760
9 A.M.–10 PM (GMT) Mon–Fri, 9 A.M.–4 P.M. Sat
U.K 0800-028-9177
All other countries 1-208-429-2371
Partner contact information
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Partner Name Contact