Alta Airport (Norwegian: Alta lufthavn; Northern Sami: Álttá girdihámman; Kven: Alattion lentohamina; IATA: ALF, ICAO: ENAT) is an international airport in the city of Alta in Alta Municipality in Finnmark county, Norway. The airport is located at Elvebakken, 4 kilometers (2.5 mi) east of the city center. It has a single, 2,253-meter (7,392 ft) runway numbered 11/29, which lies on the southern shore of the Altafjord. Alta Airport is owned and operated by the state-owned Avinor, and served 368,393 passengers in 2014, making it the busiest airport in Finnmark.

Widerøe Ground Handling is the handling agent at the airport, and the airport is served by the airlines Widerøe, Scandinavian Airlines (SAS) and Norwegian. Widerøe operates services to the city of Tromsø and several regional airports in Finnmark, such as Vadsø Airport, Båtsfjord Airport, Hammerfest Airport and Kirkenes Airport, feeding to the larger airlines routes.

It serves as a base for two Beechcraft King Airs from Babcock Scandinavian AirAmbulance, and Helitrans AS. There are a limited number of international charter flights, and private jets, especially around salmon fishing season in the Alta river.

The first airport in the area was a military airfield built by the Luftwaffe in 1943, but was damaged beyond repair during World War II. The civilian airport opened on 4 May 1963. At first services were provided by SAS to other primary airports in the north and to Oslo, but in the 1970s, several regional airports opened in Finnmark, with Widerøe flying connecting flights to them. Alta Airport's regional importance increased in 1990, when it became a hub for the newly created SAS Commuter.