To check in for American Airlines, go to aa.com or use the American Airlines mobile app starting 24 hours before departure. Click “Check-In,” enter your confirmation number or ticket number and last name. Select passengers, confirm or change seats, add baggage, and get a mobile or printable boarding pass. Mobile passes can be saved to Apple Wallet or Google Pay. Check-in closes 45 minutes before domestic flights and 90 minutes before international flights.

At the airport, use self-service kiosks to check in, print boarding passes, and tag bags. Kiosks close 45 minutes before domestic and 90 minutes before international flights. Ticket counters open 4 hours before departure and close 45 minutes (domestic) or 60 minutes (international) prior. Curbside check-in is available at many U.S. airports from 4 hours to 45 minutes before departure.

Passengers not eligible for online check-in include those with pets, military fares, oxygen needs, unaccompanied minors, or codeshare flights not operated by American Airlines. These must check in at the counter.

Boarding gates close 15 minutes before domestic and 30 minutes before international departures. Final boarding ends 10 minutes before takeoff. Bag drop closes 45 minutes (domestic) and 60 minutes (international) before departure. Arrive 2 hours early for domestic flights and 3 hours early for international to allow time for security and boarding.

Use the website or app for seat selection and faster processing. Have your ID, booking details, and travel documents ready. If issues occur with online or mobile check-in, use airport kiosks or ticket counters to complete the process.