Blue Lagoon vs Sky Lagoon: Which Iceland Spa Should You Book?

Iceland's two headline geothermal spas sound similar and are anything but. The Blue Lagoon is the world-famous milky-blue lagoon near the airport. Sky Lagoon is the newer oceanside spa minutes from central Reykjavik. If you only have time and budget for one, here is how to choose without regret.

Blue Lagoon: the icon

The Blue Lagoon is the picture you have already seen: opaque, silica-rich, milky-blue water surrounded by black lava. Comfort admission includes full access, a towel, a drink and a silica face mask, and starts from £97. Its location is the clever part: it sits between Keflavik Airport and Reykjavik, so it is the perfect first or last stop of a trip, bags in the car, spa on the way.

Check Blue Lagoon comfort admission tickets →

The honest downside: it is the most popular attraction in the country, it must be pre-booked for a timed slot, and it can feel busy. It is also the pricier of the two.

Sky Lagoon: the view

Sky Lagoon's signature is a 70-metre infinity edge that appears to spill straight into the North Atlantic. Its seven-step spa ritual (warm lagoon, cold plunge, sauna, cold mist, salt scrub, steam and back to the lagoon) is more of a guided sequence than the Blue Lagoon's free-roam soak. Entry starts from £86, and it is only a few minutes from downtown Reykjavik, so you do not need a car or a transfer to reach it.

See Sky Lagoon entry with the 7-step spa ritual →

The trade-off: the water is clear seawater, not the famous milky blue, so it is less photogenic in the classic Instagram sense, even if the ocean view is arguably more beautiful.

Which one to book

Book the Blue Lagoon if: you want the iconic milky-blue photo, you are arriving or leaving via Keflavik and want to break the airport transfer, and the higher price is not a dealbreaker.

Book Sky Lagoon if: you are based in Reykjavik without a car, you love a proper spa ritual, you want the ocean infinity view, and you would like to save a little money.

The verdict

For a once-in-a-lifetime, tick-the-box Iceland moment tied to your airport journey, the Blue Lagoon wins. For a more relaxing, view-led soak that is easy to reach from the city and a touch cheaper, Sky Lagoon is the smarter pick. Neither is a bad choice, and both should be pre-booked because walk-up space is rarely available.

One practical tip for both: the silica and salt are hard on hair. Use plenty of the free conditioner, and consider tying long hair up unless you want to spend the evening detangling.