Originally Posted by steveholt

Flew BOS-LAX this morning and was in F. Ten minutes after takeoff, two seats in F were open. FA paged two passengers to hit their call button, neither of whom did. Five minutes later, a passenger who had clearly been sprinting to make the flight walked onto the plane and took one of the F seats, at which point the boarding door closed. The plane then left for LAX without upgrading anybody into the final seat in F.

Is this common? Surely there were medallions on this flight who could have used the seat.