Reykjavík Airport (Icelandic: Reykjavíkurflugvöllur) (IATA: RKV, ICAO: BIRK) is the main domestic airport serving Reykjavík, the capital of Iceland. The airport is located about two kilometres (1+1⁄4 miles) from the city centre. It is the domestic hub of Icelandair flights and has two runways. Reykjavík Airport is owned and operated by the state enterprise Isavia. Having shorter runways than the larger Keflavík International Airport, which is sited 50 kilometres (30 mi) out of town, it serves only domestic flights within Iceland and limited Greenland flights. The airport also services medivac, private aviation and general aviation. It can also serve as alternate airport for flights inbound towards Keflavík, in case of adverse weather conditions there.