On July 29,2020, we booked premium economy airfare to Scotland for May 2021. COVID canceled this trip and we rescheduled for May 2022. AA gave us credit that was good for 1 year from the original purchase date. That wasn't going to help us because the airfare for May 2022 wouldn't be available before the credit expired. I was told that if we booked a cheap flight with the credit, they would issue a voucher for the remaining credit that would be good for another year. We booked $60 tickets to St Louis and got the voucher for the remaining balance. We used that to book our 2022 airfare on July 31,2021 and upgraded to Business Class (1st). We now have nearly $8,000 in airfare for our trip. Based on this procedure, if we have to cancel, we would end up with $8,000 in credit that would have to be used by July 31,2022. They don't make it easy!