I used to wonder how American Airlines decides who gets upgraded first, especially when flights are full. On one trip, I was hoping for an upgrade but wasn’t sure where I stood. I ended up calling 844-734-0813, and the agent explained that upgrade priority is based on things like elite status level, the type of fare you booked, and when you requested the upgrade. They even reviewed my reservation and suggested a small change that could improve my chances. My upgrade cleared just before boarding, and it finally made sense why timing and status matter so much. Since then, I always check in by phone when I’m planning upgrades or changes.