If you forgot to add your Mileage Plus account number to your reservation or at check-in, or you believe miles earned for your flight activity were not credited to your account, please remember that you must wait at least 72 hours after your flight has been completed before requesting retro-credit.

Request flight credit for my United flight
In the event that mileage earned with United Airlines does not appear on your Mileage Plus Summary, you may request a credit subject to the following conditions:

• Flight activity occurred on or after your enrollment date in Mileage Plus.
• Flight activity occurred less than 12 months ago. Requests for greater than 12 months will not be honored.
• The name on your ticket should match the name on your account and the name as it appears on your passport or travel identification.

The following information will also be considered when validating flight activity on United flights:

• Flight Information should be for completed flights flown on United, Ted or United Express. For irregular operations, reroutes, and schedule changes use the flight information for the actual flight flown, not the flight that was ticketed.
• The more complete and accurate the information, the easier it will be to process.
• Please do not submit requests for retro credit on United flights until 72 hours after completion of your trip.
• Flight activity that has already been credited to a frequent flier account (partner or United) is not eligible to be posted to a second account number or a different frequent flyer program.