Oslo Airport, Gardermoen (IATA: OSL, ICAO: ENGM) (Norwegian: Oslo lufthavn, Gardermoen) is the principal airport serving Oslo, Norway. It acts as the main domestic hub and international airport for Norway, and the second-busiest airport in the Nordic countries. A hub for Scandinavian Airlines and Norwegian Air Shuttle, and a focus city for Widerøe, it is connected to 25 domestic, 27 European and 5 intercontinental destinations. More than 18 million passengers traveled through Oslo Airport in 2009, of which 8.6 million were domestic—making Gardermoen the sixth-busiest domestic airport in Europe.

The airport is located at Gardermoen in Ullensaker, 35 km (22 miles) north-northeast of Oslo.