Switzerland. Canton Ticino. Zurich Airport Swiss airplanes on the airport tarmac. Passengers walk down a footbridge to board a plane. Swiss International Air Lines AG (stylised as SWISS), commonly referred to as Swiss, is the national airline of Switzerland. Zurich Airport (German: Flughafen Zürich, IATA: ZRH, ICAO: LSZH), also known as Kloten Airport, is the largest international airport of Switzerland. The tarmac is also often used to describe airport aprons (also referred to as "ramps"), taxiways, and runways regardless of the surface. 29.05.2019 © 2019 Didier Ruef