Seat selection feels like a done deal the moment you confirm it. In reality it can change between booking and boarding, sometimes without any notification at all.
Why Did My Seat Selection Change?
Airlines swap aircraft on routes regularly. When the aircraft changes, the cabin layout changes with it, and your original seat assignment does not always survive the transition. A seat that existed on one aircraft type simply may not exist in the same position on the replacement.
What Is Happening Right Now
Qantas is currently offering only window or aisle options as a dropdown on some flights rather than allowing specific seat selection. That is the airline deliberately managing expectations while schedules remain unstable, an indirect signal that aircraft assignments on those routes are subject to change.
Qatar Airways has permanently replaced its A380 services to Perth and Melbourne with 777s. A different aircraft means a different cabin configuration entirely, which means any seat selected on the original A380 layout no longer applies.
What to Do About It
Check your seat assignment again closer to departure, not just at the time of booking. If your aircraft has changed, your seat may have moved, disappeared, or been reassigned without any notification to you.
If you arrive at the airport and your seat has been changed to something you are not happy with, ask the check-in agent. It is not always possible to fix, but agents occasionally have more flexibility than the app or website suggests.
Has an aircraft swap ever affected your seat selection? Comment below.