Which part of the airport is designated for passenger check-in and waiting?

The airport terminal building is the designated area for passenger check-in and waiting. Within the terminal, passengers can find check-in counters for airlines, kiosks for self-check-in, and various amenities to make their wait comfortable, such as seating areas, shops, and restaurants. This space is designed to facilitate the initial steps of the travel experience, from checking in for flights to waiting for boarding.

In contrast, the runway is used for takeoffs and landings, making it essential for flight operations but not for passenger services. The control tower oversees air traffic control and manages the safe movement of aircraft, not passenger activities. The baggage claim area is focused on the retrieval of luggage after flights, serving passengers after they have disembarked. Therefore, the terminal is uniquely tailored to handle the needs of passengers prior to their flight.