AirlineAirportTerminals are specific structures at airports where travelers board and exit from airplanes. The airport's services and amenities, including baggage claim, security checks, check-in counters, customs, and boarding gates, are mostly accessible from these terminals. One or more airlines may operate out of a terminal, with distinct sections designated for domestic and international flights, depending on the size of the airport. Smaller airports could just have one multipurpose terminal, but some larger airports have several terminals connected by transportation networks like buses or trains.