Transfers are usually instantaneous. The recipient should see their miles in their account almost immediately after you make the transfer. However, it might take up to 1 business day for the transaction to process. If there's a problem with your transfer, contact the MileagePlus Service Center at 1-800-421-4655.

The time it takes for miles to transfer into a United MileagePlus account depends on the source, but in 2026, transfers from major credit card partners like Chase Ultimate Rewards are typically instantaneous. When you initiate a transfer from your Chase portal, the miles usually appear in your United account the moment you refresh your browser, allowing you to book "last-minute" award seats before they disappear. However, if you are transferring points from hotel programs like Marriott Bonvoy, the process is significantly slower, often taking between 48 hours to 7 days. It is also important to note that "transferring" miles from one United member to another—a service United provides for a fee—is usually immediate but can take up to 24 hours to finalize in the recipient's "available balance." If you are planning to book a time-sensitive "Saver Award," the best strategy is to use a direct credit card transfer. If the points don't appear immediately, logging out and back into your MileagePlus account often triggers the system to update and reflect the newly arrived balance.