We have used the 10am ferry from west end 5 times in the last year and each time have made it to St Thomas before 12, usually arriving just after 11 am. Native Son has been very consistent and their large ferry is a great boat compared to the Bomba Charger. We have never gone to airport 3 hours before flight and nobody at American has mentioned that. Normally through all the lines and checks at the airport in less than an hour. Going back this Saturday and I have my fingers crossed that my luck will hold up.