UNITED Airline Check In +1 - 866 - 551 - 1186

Start your journey smoothly with UNITED Airlines flexible check-in options. Check in online or via mobile app up to 48 hours before your flight (24 hours for U.S. flights). Prefer to check in at the airport ? Use the self-service kiosks or head to the check-in counter. Easily select your seat, add luggage, and access your board pass.