Originally Posted by
aaupgrade
Of course in your case, and in theory, they'll put you back on the flight you arrived on; but I don't know if I'd count on that.
The problem being that in the absence of a visa the airline taking you to MPM would most likely not allow you to board, even though you could show that you had a valid ticket for the return flight so they would not be out of pocket when your entry was declined.