SEA - KEF

$316 Find Cheap Flights from Seattle to Reykjavik-Keflavik Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Reykjavik departing on 2/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Reykjavik Keflavik Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Reykjavik, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Reykjavik, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$456
Typical prices: $429-$806
Icelandair
Tue 1/13Tue 1/20
SEA - KEF • Non-stop
Cheapest one-way
$316
Typical prices: $636-$820
Multiple Airlines
Sat 2/28
SEA - KEF • 3 stops
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 54% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 32% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Reykjavik!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Reykjavik (SEA-KEF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Reykjavik that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Reykjavik

Tue, Jan 13 - Tue, Jan 20
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$456Icelandair
Sat, Jan 24 - Sat, Jan 31
Multiple Airlines Logo
2:00 pm - 2:20 pm
SEA
-
KEF
16h 20m1 stop
Multiple Airlines Logo
2:20 pm - 9:12 pm
KEF
-
SEA
38h 52m2 stops
$465Multiple Airlines
Sun, Jan 4 - Tue, Jan 13
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$466Icelandair
Sat, Jan 24 - Sat, Jan 31
Lufthansa Logo
2:00 pm - 2:20 pm
SEA
-
KEF
16h 20m1 stop
Lufthansa Logo
3:10 pm - 1:20 pm
KEF
-
SEA
30h 10m1 stop
$471Lufthansa
Mon, Jan 12 - Wed, Jan 21
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$473Icelandair
Fri, Jan 30 - Fri, Feb 6
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$479Icelandair
Thu, Jan 1 - Wed, Jan 14
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$480Icelandair
Sat, Jan 24 - Sat, Jan 31
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$481Icelandair
Sun, Jan 11 - Fri, Jan 16
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$482Icelandair
Thu, Feb 19 - Thu, Feb 26
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$487Icelandair
Booking Insights

KAYAK's insights & trends for Seattle to Reykjavik flights

Get data-powered insights and trends into flights from Seattle to Reykjavik to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Reykjavik Keflavik Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Reykjavik Keflavik Intl Airport departing in January.

What’s the cheapest day of the week to fly from Seattle to Reykjavik-Keflavik Airport?

The average price of all round-trip flights from Seattle to Reykjavik Keflavik Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Seattle to Reykjavik-Keflavik Airport, you should consider leaving on a Wednesday and avoid Thursdays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Mondays and the most expensive ones on Saturdays.

What is the cheapest month to fly from Seattle to Reykjavik Keflavik Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Reykjavik Keflavik Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Reykjavik Keflavik Intl Airport is October, where tickets cost $441 (return) on average. On the other hand, the most expensive months are February and June, where the average cost of round-trip tickets is $820 and $749 respectively.

Can I save money by flying with a layover from Seattle to Reykjavik Keflavik Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $573, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Seattle to Reykjavik Keflavik Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Reykjavik Keflavik Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Reykjavik Keflavik Intl Airport, you should book around 3 weeks before departure, which saves you about 54% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$316
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly with an average 1% increase in price.
Flight from Seattle to Reykjavik-Keflavik Airport

When to book flights from Seattle to Reykjavik

Are your dates flexible? Find out the best times to travel from Seattle to Reykjavik based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to Reykjavik-Keflavik Airport flights

  • What is the cheapest flight from Seattle to Reykjavik Keflavik Intl Airport?

    In the last 3 days, the lowest price for a flight from Seattle to Reykjavik Keflavik Intl Airport was $316 for a one-way ticket and $456 for a round-trip.

  • Do I need a passport to fly between Seattle and Reykjavik-Keflavik Airport?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seattle and on arrival in Reykjavik-Keflavik Airport.

  • Which airports will I be using when flying from Seattle to Reykjavik-Keflavik Airport?

    When flying out of Seattle you will be using Seattle/Tacoma Intl. You will be landing at Reykjavik-Keflavik Airport, also known as Reykjavik Keflavik Intl.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Reykjavik-Keflavik Airport?

    All the following airlines offer inflight Wi-Fi service on the Seattle to Reykjavik-Keflavik Airport flight route: Air France, Delta, Virgin Atlantic, Lufthansa, United Airlines, KLM, and Alaska Airlines.

  • Which aircraft models fly most regularly from Seattle to Reykjavik-Keflavik Airport?

    The Airbus A330-200 is the aircraft model that flies most regularly on the Seattle to Reykjavik-Keflavik Airport flight route.

  • Which airline alliances offer flights from Seattle to Reykjavik-Keflavik Airport?

    SkyTeam is the only airline alliance operating flights between Seattle and Reykjavik-Keflavik Airport.

  • On which days can I fly direct from Seattle to Reykjavik-Keflavik Airport?

    There are nonstop flights from Seattle to Reykjavik-Keflavik Airport on a daily basis.

  • Which is the best airline for flights from Seattle to Reykjavik, Delta or Icelandair?

    The two airlines most popular with KAYAK users for flights from Seattle to Reykjavik are Delta and Icelandair. With an average price for the route of $573 and an overall rating of 7.9, Delta is the most popular choice. Icelandair is also a great choice for the route, with an average price of $642 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Seattle to Reykjavik-Keflavik Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Reykjavik-Keflavik Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Reykjavik-Keflavik Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reykjavik-Keflavik Airport from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Reykjavik-Keflavik Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Reykjavik-Keflavik Airport with an airline and back to Seattle with another airline. Booking your flights between Seattle and KEF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Reykjavik-Keflavik Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Reykjavik-Keflavik Airport from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Reykjavik Keflavik Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $433 or less one-way and $430 or less round-trip.

Prefer to fly direct from Seattle to Reykjavik-Keflavik Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Reykjavik Keflavik Intl

Monday

Icelandair

Icelandair

Tuesday

Icelandair

Icelandair

Wednesday

Icelandair

Icelandair

Thursday

Icelandair

Icelandair

Friday

Icelandair

Icelandair

Saturday

Icelandair

Icelandair

Sunday

Icelandair

Icelandair

See more direct flights

Direct returns

Reykjavik Keflavik Intl to Seattle/Tacoma Intl

Monday

Icelandair

Icelandair

Tuesday

Icelandair

Icelandair

Wednesday

Icelandair

Icelandair

Thursday

Icelandair

Icelandair

Friday

Icelandair

Icelandair

Saturday

Icelandair

Icelandair

Sunday

Icelandair

Icelandair

See more direct flights

Reviews of the top airlines flying from Seattle to Reykjavik

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Reykjavik. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Reykjavik? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8009 reviews
7.9Entertainment
7.3Food
8.5Crew
8.1Boarding
7.9Comfort
Airline reviews

Great. I had to modify a flight. That was easy and free. Thank You

10.0 ExcellentOlumuyiwa, Dec 2025
DTW - ATL
Read more Delta reviews

Great. I had to modify a flight. That was easy and free. Thank You

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

The Experience Was Torture Spend a few extra dollars and avoid Icelandair at all costs. There is absolutely no refreshments, no food, no drinks. Only water, coffee, tea are free and at only half a tiny cup. Entertainment is limited selection of films, shows and mostly outdated. The seats are smaller than usual, with no cushion, no pillows, no blankets. First time in my life have I witness an airline asking for donations in spare change for a charity. With all the money Icelandair saves by starving the passenger, they can afford to give this charity on their own.

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

It was too cold in the plane my feet froze

Service was excellent. Food and drinks were very good except for a greasy lump of a donut at the end of the flight that left us both feeling internally disgusted.

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

I flew Icelandair with my partner from Prague to the US. Overall flight time was around 12 hours, with a connecting flight in Iceland. I have flown internationally for years and with multiple airlines. Every airline serves you a meal when traveling internationally. Icelandair not only did not offer an inclusive meal, but they did not even offer a snack. The only things they served over our long flight was water and coffee. Ridiculous! Never again will I fly with Icelandair.

Best smelling onboard bathrooms ever. Even after use the whole flight. Biggest overhead bins. Most legroom in economy class. Great Icelandiic music. Really nice staff. Icelandair is awesome! (Don’t fly Air Canada! During the strike they lied about no flights available (I booked this flight myself) and hid the process to get money back on their website by obscuring menu titles, then made it difficult and time consuming to fill out. I’m Canadian. Don’t trust Air Canada!

Everything you need to know for your flight from Seattle to Reykjavik

Information on your arrival and departure airports