Keflavík International Airport is on the Reykjanes peninsula and is Iceland's main international gateway. It serves Reykjavík and the southwest, while many visitors continue on a longer road trip around the country. Reykjavík's domestic airport is a different facility in the capital.
Airport coaches, taxis and rental cars provide onward travel. Book the transfer that matches your destination and allow substantial time if connecting to a domestic flight at Reykjavík Airport. For a touring holiday, plan the first driving stage realistically rather than treating distant Icelandic regions as local airport transfers.