Hello,

The quickest way to update passport information is through the United App during check-in for an international flight, as we have removed the passport data field from MileagePlus profiles on united.com. When you have a stored passport on the App, you will be asked to confirm that you are traveling with that passport. If travel documents have changed, you can choose to replace the existing passport or add a new passport (there is a limit of two stored passports). After selecting to replace or add a new passport, you will be prompted to accept the Passport Storage Terms. The application will then allow you to take a photo of the picture page of your passport. Once the validation process has been successfully completed, the check-in process can continue with the newly scanned passport. Hope this helps.

Thank you,

-UA Insider