American Airlines Check In +1 - 866 - 551 - 1186

You can check in for your American Airlines flight starting 48 hours before departure via the website or mobile app—or 24 hours in advance if you're traveling to or from the U.S. Airport check-in is also available at kiosks and counters. During check-in, select your seat, add baggage, and receive your boarding pass digitally or in print. American Airlines recommends arriving at least 3 hours early to complete airport formalities smoothly.