Keflavík International Airport is located about 50 km away from Reykjavík and there are various ways to get to and from the airport.
Getting from Keflavík Airport By Rental Car
Most, if not all, of the bigger car rental agencies in Iceland offer pick up in Keflavík for a small fee. The fee is in fact usually so small that if there’s more than two of you, it is cheaper to pay the fee than take the bus to pick up the car in Reykjavík. So if you are renting a car anyway, you should keep that option in mind. Finding the way from Keflavík airport to Reykjavík is quite straight forward but I hear the biggest trouble is finding the way out to the main road. This is something I hear from the guests on my walking tours at least.
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Getting from Keflavík Airport By Bus
For a long time there was no public bus from Keflavík Airport to Reykjavík but you could either take the Flybus and the Airport Express. They offer similar service for a similar price and although I’ve only used the Flybus I’m sure they are both equally good. If you are desperate for the internet after a long flight though, The Flybus offers free WiFi on all their buses. Both companies can drop you off at your hotel but the service is included with the Airport Express but you can book it separately on the Flybus.
Nowadays you can also take the public bus from the airport but the schedule is not as good as the Flybus and Airport Express and the savings are not that great that it’s worth it. In my opinion at least plus it takes much longer.
Getting from Keflavík Airport By Taxi
You don’t have to worry about being ripped off by Taxi drivers in Reykjavík like in some cities around the world. Taxis run by the meter between Reykjavík and Keflavík but sometimes they offer a fixed price which comes to about the same amount as the meter anyway. There is a taxi line outside the arrivals hall but you can also book one in advance.
If you want to book an airport taxi transfer in advance you can do that here. I’m a bit biased when it comes to this option because the company is run by my dad but the service is reliable, he’ll go out of his way to help you with whatever you need and his car is big and comfy. He can also comfortably accommodate wheelchair users.
If you are broke or you want to want to protest against the evil axis of organized tourism there’s two things you could do to try to skip spending money on a ride to Reykjavík.
First of all, you could try to hitchhike. Hitchhiking is pretty common and safe in Iceland but I don’t know how easy it is to get a ride on this particular route so you might have to walk a long way with all your luggage. Alternatively, you might want to try befriend whoever sits next to you on the plane and if he or she is a local, there’s a good chance their car will be at the airport or that they have a ride waiting for them when you land. People are nice, they might offer you a ride.