I tend to agree with Manpot on the scheduling of the ferry and the airport, however, I will say that the last 2 times I have flown out of STT (January 10 which was a Tuesday and March 21 which was a Tuesday) it has not been bad. In fact this past Tuesday there wasn't even a line at the American counter...which is unheard of. So then I was thinking that it was just because it was a Tuesday but my daughter flew out on March 19, which was a Sunday and had the same experience. I'm crossing my fingers that maybe they have figured some things out??? Regardless, I would get over to STT and stay there for my last day so that I have a little wiggle room.