Boarding pass: a document that allows a passenger to board a flight. Example: "Make sure you keep your boarding pass and passport with you at all times."

Baggage claim: the area in an airport where passengers pick up their checked luggage after a flight. Example: "We'll meet you at baggage claim after we collect our bags."

Customs: the place in an airport where officials check passengers and their luggage to make sure they are not carrying anything illegal. Example: "The customs line was very long, but we finally made it through."