Originally Posted by
Kmxu
No. sometimes, gate agent locks up the seat map. You have to ask the GA to change your seat.
This is correct, once either the gate/ops/other takes control of the flight it locks seat changes from the check-in portion. Generally this occurs T45 for domestic or T90 for international or when the gate agent arrives at the counter to work the flights. However I have seen flights go gate control in excess of T2 hours.
Best,