An airport is a location where aircraft such as fixed-wing aircraft, helicopters, and blimps takeoff and land. Aircraft may be stored or maintained at an airport. An airport consists of at least one surface such as a runway for a plane to takeoff and land, a helipad, or water for takeoffs and landings, and often includes buildings such as control towers, hangars and terminal buildings.

Larger airports may have fixed base operator services, seaplane docks and ramps, air traffic control, passenger facilities such as restaurants and lounges, and emergency services. A military airport is known as an airbase or air station. The terms aerodrome, airdrome, airfield, and airstrip may also be used to refer to airports, and the terms heliport, seaplane base, and STOLport refer to airports dedicated exclusively to helicopters, seaplanes, or short take-off and landing aircraft. In some jurisdictions, the term airport is used when the facility is licensed as such by the relevant government organization (e.g. the U.S. Federal Aviation Administration (FAA), Transport Canada). Elsewhere the distinction is one of general appearance. Other jurisdictions define an airport as having the customs offices etc. expected of a port, though the more general term is airport of entry.