Originally Posted by
BigMoneyGrip
The thing in common between the 2 times is both trips had outbound and return flights within one day of each other and in both cases we checked in for the return right at the 24 hour mark upon receiving the email/alert from AA. My guess is there is some glitch in a process that closes out the first flight that invalidates the check in for the return?
I used to have this issue years ago. Now, I wait until about 4-8 hours to check-in and never do so the day before. I haven't had an issue since.