Originally Posted by
Djokison
AA doesn’t accept payment for bags in advance/online. You can pay for your bag at a check in kiosk or with an agent at the check in desk.
AA does allows you to pay for bags online. See
https://www.aa.com/i18n/travel-info/baggage/baggage.jsp.
How do I pay for my bags online before traveling?Expand
You can choose to pay for up to 3 bags when you check in (starting 24 hours and up to 4 hours before departure) on aa.com or in the app. You'll get an email confirmation with instructions on where to drop bags at the airport.
If you are checking more than 3 bags, you can add more at the airport according to your bag allowances.