Can I use Online Flight Check-In while traveling on 500-mile upgrades?
If your upgrade has already been confirmed, you must have the appropriate number of 500-mile upgrades in your account in order to complete check-in. If your upgrade has not been confirmed at the time you use Online Flight Check-In, you will automatically be given the opportunity to be added to the Airport Upgrade Standby List on AA.com, at Self-Service Check-In or by an airport agent. The date and time of your original request, along with your elite status level, will determine your priority on the Airport Upgrade Standby List. Please note: you must have the appropriate number of upgrades in your account at the time of check in for yourself and, if applicable, your companion, in order to be added to the standby list.