I'm trying to get a flight from Phila to St. Martins and the price for the last week in June is $880. I found that you can get a flight to Nevis via St. Marten for $467. This flight has a 2 1/2 hour layover and then Windward island flight. Has anyone just used a portion of a flight like this? I'm wondering what would happen if you booked like this and only used the St. Martin portion of the ticket. Anybody tried this???