United Airlines - Airline Tickets, Travel Deals and Flights
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MileagePlus sign-in is not available when booking with myUAdiscount. You may add your MileagePlus number on the traveler information page during the booking process.
Check in with one of the following options:
Confirmation or eTicket number
Confirmation or eTicket number*
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You're able to check in starting 24 hours before your scheduled departure.
Minimum time requirements for check-in, checking bags and boarding vary based on your departure airport and destination.
Learn more about these requirements.
Learn more about our check-in process.