Setting aside anything on a boarding pass, what is the rule on when you have to be at the gate for an international flight?
For example, I arrived in Miami a few days ago on a delayed flight at 1034 PM. I was up front and ran over to the gate for my connection and arrived there at 1040 PM. The connection to Santiago de Chile was scheduled to depart at 1055 PM.
Of course, by the time I got to the gate it was sealed tight and the GA's were no where to be seen. There were a couple of non-revs standing around saying the plane had gone out full and was closed. So obviously, they had given away my seat well before 15 minutes before departure.