The main airport serving the city is Gardermoen Airport, located in Ullensaker,  from the city centre of Oslo. It acts as the main international gateway to Norway, and is the sixth-largest domestic airport in Europe. Gardermoen is a hub for Scandinavian Airlines, Norwegian Air Shuttle and Widerøe. Oslo is also served by a secondary airport, which serve some low-cost carriers, such as Ryanair: Torp Airport,  from the city.