Checking a bag with American Airlines in 2026 is a streamlined process that begins well before you reach the airport. The most efficient method is to use the American Airlines mobile app or website during the 24-hour check-in window. During this digital check-in, you can specify the number of bags you are bringing and pay the associated fees, which are often discounted compared to paying at the airport counter. Once you arrive at the terminal, you can head to a Self-Service Kiosk to print your bag tags by scanning your mobile boarding pass. After tagging your bags, you simply drop them at the designated Bag Drop station. For those who prefer a more traditional approach, full-service check-in counters remain available where an agent can assist with tagging and weighing. It is crucial to ensure your bags meet the standard weight limit of 50 lbs (23 kg) for Economy or 70 lbs (32 kg) for Business/First Class to avoid heavy "overweight" surcharges. For international flights, ensure your passport is handy, as it will be verified during the bag drop process.