Question: are rek and kef the same airport?
Answer: There are two airports "in" Reykjavík: Reykjavík Airport, which is close to town and serves only domestic destinations and Greenland, and Keflavík International Airport, a.k.a. Reykjavík–Keflavík, which is 50km to the west and which has all the international flights. ... Reykjavík Airport is RKV; Keflavík is KEF.