When in my trip does US customs clearance occur? I’m traveling from Malta (Europe) to D.C. with a 1 hour layover in Istanbul. Non-U.S. citizen. I’ve been to the U.S. before but I can’t remember as it’s been a while – does anyone know when I’d have to go through U.S. customs / DHS check? I’m asking as my layover in IST is pretty short so I don’t want to stress about missing my flight to D.C. if…