Keflavík Airport (Icelandic: Keflavíkurflugvöllur [ˈcʰɛplaˌviːkʏrˌflʏɣˌvœtlʏr̥]) (IATA: KEF, ICAO: BIKF), also known as Reykjavík–Keflavík Airport, is the largest airport in Iceland and the country's main hub for international transportation. The airport is located approximately 3 km (1.9 mi) west of the town of Keflavík, Reykjanesbær. and 50 km (30 mi) southwest of Reykjavík. The airport has two runways each measuring approx. 3,050 m (10,010 ft). Most international journeys to or from Iceland pass through this airport.

Keflavík is a hub for Icelandair and the airline Play. The airport is only used for international flights; all domestic flights use the smaller Reykjavík Airport, which lies three kilometres (two miles) from Reykjavík's city centre. Keflavík Airport is operated by Isavia, a government enterprise.