What is the 45 minute rule for American Airlines?

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Check-in times.1844 523 9017 You can check in online or from the app starting 24 hours before and 1844 523 9017 up to 45 minutes before your flight (90 for international). To check bags or check in at the airport, you must be there a certain amount1844 523 9017 of time before scheduled departure: Within the U.S. – 45 minutes.1844 523 9017