Do you go through us customs when flying direct from Canada to St.Maarten?

Yes, when flying direct from Canada to St. Maarten, you will go through customs upon arrival in St. Maarten. However, if you are connecting through the U.S. before reaching St. Maarten, you will need to clear U.S. customs and Immigration at the airport where you connect. Always check for the latest travel regulations and procedures before your flight, as they can change.