This depends on your routing. When entering the Schengen Area, passport control normally takes place at your first Schengen entry airport, even if you connect onward. Baggage and customs procedures may follow a different routing. Returning to the United States, inspection may take place at your first U.S. arrival airport or at a foreign airport with U.S. preclearance, including certain airports in Canada and Ireland. Follow your final travel instructions and airport signs.