Until December 31, so register if you have a flight coming up before then (link).
|Available on qualifying flights. Mobile check-in is currently available for any United- or United Express-operated flight within the U.S., Puerto Rico or the U.S. Virgin Islands. Mobile boarding documents are currently available for customers on flights departing select airports on United-and United Express-operated itineraries within the United States, the U.S. Virgin Islands and Puerto Rico. Visit united.com/mobileservices for more information.
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