SEA - KEF

$267 Find Cheap Flights from Seattle to Reykjavik - Compare and Save

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 10/7. 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

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Everything you should know

Cheapest round-trip
$484
Typical prices: $636-$833
Alaska Airlines
Sun 9/6Wed 9/9
SEA - KEF • Non-stop
Cheapest one-way
$267
Typical prices: $469-$601
Multiple Airlines
Wed 10/7
SEA - KEF • 3 stops
Top airlines
Cheapest • from $484 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Alaska Airlines and Icelandair. Average duration is 7h 30m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg $536 (round-trip)
Shortest trip • 11h 10m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
Good to know
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Good to know
Good to know
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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

Sun, Sep 6 - Wed, Sep 9
Alaska Airlines Logo
6:35 pm - 9:00 am
SEA
-
KEF
7h 25mnonstop
Alaska Airlines Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
$484Alaska Airlines
Fri, Sep 4 - Sat, Sep 12
Icelandair Logo
3:40 pm - 6:15 am
SEA
-
KEF
7h 35mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$485Icelandair
Wed, Sep 9 - Thu, Sep 17
Delta Logo
7:15 am - 7:00 am
SEA
-
KEF
16h 45m
2 stops
Delta Logo
11:25 am - 11:58 pm
KEF
-
SEA
19h 33m
2 stops
$488Delta
Fri, Sep 11 - Fri, Sep 18
Delta Logo
11:59 pm - 7:00 am
SEA
-
KEF
24h 01m
1 stop
Delta Logo
9:30 am - 11:55 pm
KEF
-
SEA
21h 25m
1 stop
$489Delta
Mon, Sep 7 - Tue, Sep 15
Delta Logo
11:59 pm - 7:00 am
SEA
-
KEF
24h 01m
1 stop
Delta Logo
9:30 am - 4:43 pm
KEF
-
SEA
14h 13m
1 stop
$490Delta
Fri, Sep 11 - Fri, Sep 18
KLM Logo
5:50 pm - 9:30 am
SEA
-
KEF
32h 40m
2 stops
KLM Logo
9:30 am - 10:05 pm
KEF
-
SEA
19h 35m
2 stops
$493KLM
Fri, Sep 11 - Fri, Sep 18
KLM Logo
5:50 pm - 9:30 am
SEA
-
KEF
32h 40m
2 stops
KLM Logo
9:30 am - 4:43 pm
KEF
-
SEA
14h 13m
1 stop
$494KLM
Mon, Sep 7 - Tue, Sep 15
Delta Logo
11:59 pm - 7:00 am
SEA
-
KEF
24h 01m
1 stop
Delta Logo
11:25 am - 11:55 pm
KEF
-
SEA
19h 30m
2 stops
$495Delta
Tue, Aug 25 - Fri, Aug 28
Alaska Airlines Logo
6:35 pm - 9:00 am
SEA
-
KEF
7h 25mnonstop
Alaska Airlines Logo
12:45 pm - 1:40 pm
KEF
-
SEA
7h 55mnonstop
$497Alaska Airlines
Fri, Sep 18 - Wed, Sep 23
Multiple Airlines Logo
10:40 pm - 9:30 am
SEA
-
KEF
27h 50m
1 stop
Multiple Airlines Logo
11:25 am - 10:10 pm
KEF
-
SEA
17h 45m
2 stops
$498Multiple Airlines
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 September.

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

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, 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 Fridays 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 January, where tickets cost $497 (return) on average. On the other hand, the most expensive months are August and February, where the average cost of round-trip tickets is $962 and $877 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 $615, 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$267
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 41% increase in price.
Flight from Seattle to Reykjavik

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 flights

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

    In the last 5 days, the lowest price for a flight from Seattle to Reykjavik Keflavik Intl Airport was $267 for a one-way ticket and $484 for a round-trip.

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

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

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

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

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

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

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

    The Airbus A330-900neo is the aircraft model that flies most regularly on the Seattle to Reykjavik flight route.

  • Which airline alliances offer flights from Seattle to Reykjavik?

    oneworld is the only airline alliance operating flights between Seattle and Reykjavik.

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

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Reykjavik are Alaska Airlines and Icelandair. With an average price for the route of $806 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Icelandair is also a great choice for the route, with an average price of $640 and an overall rating of 7.0.

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

    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.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reykjavik 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?

    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 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?

    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 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 $286 or less one-way and $605 or less round-trip.

Prefer to fly direct from Seattle to Reykjavik?

 
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

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Tuesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Wednesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Thursday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Friday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Saturday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Sunday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

See more direct flights

Direct returns

Reykjavik Keflavik Intl to Seattle/Tacoma Intl

Monday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Tuesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Wednesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Thursday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Friday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Saturday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Sunday

Alaska Airlines,Icelandair

Alaska Airlines,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
Alaska AirlinesOverall score based on 12654 reviews
7.8Comfort
8.1Boarding
7.1Food
8.5Crew
7.0Entertainment
Airline reviews

A smooth flight; a little cold on the ground and then suddenly heated when in the air; legroom on the 737-800 worse than on the outgoing flight, on 737-900. Much prefer flying Alaska to the northwest than flying American anywhere!

10.0 ExcellentAnonymous, Jul 2026
SEA - DFW
Read more Alaska Airlines reviews

A smooth flight; a little cold on the ground and then suddenly heated when in the air; legroom on the 737-800 worse than on the outgoing flight, on 737-900. Much prefer flying Alaska to the northwest than flying American anywhere!

The flight was canceled and dumped everyone in Albany. I still haven’t received reimbursement for transportation for getting to NYC or appropriate compensation for the cancelled flight.

My experience was significantly impacted by problems in Seattle with luggage check-in. Apparently, Alaska Air was significantly understaffed in this area for the number of passengers for that morning or they had issues with the machinery processing and loading the baggage. Upon tagging my suitcase, I was sent from one drop-off area to another and yet a third on a different floor. The line to do most of this was VERY long and moved quite slowly at first--I just barely made it on time to catch my flight even. though I arrived at the airport an hour and 40 minutes early. Then when I arrived in Charleston, my bag didn't arrive on the carousel with other luggage and I had to spend extra time tracking it down.. The relative who helped me out at SEATAC said he had never seen the airport so backed up and he travels out of that airport frequently. It was a very stressful experience, and very disappointing.

NO ENTERTAINMENT OR WIFI OR FOOD. ONLY WATER TO DRINK AND SPICY PRESTLES TO TAL CHAEOS AT CHECKIN

Boarding was smooth, the crew was kind and friendly, and even though we were in the Saver class, the seats were generous enough for my daughter to nap on me and I had enough room to recline and sleep for our overnight flight. If I had stayed awake I might have quibbled with the lack of a true meal, but the snacks worked for me and when my daughter was hungry (as she did NOT sleep), the crew took care of her. There was room for all of our bags on a very full flight, which was nice. It has been awhile since I haven’t checked a bag, so I had worried.

Customer service of one flight attendant, impersonal to asking questions

Great and comfortable aircraft. Good food and the staff was amazing

Someone rebooked my Alaska flight to a much later Delta flight. Now I am sitting at the Seattle airport after a long international flight and have to wait another 4 hours even though I would have been able to catch my initial flight

I was very surprised that at the Seattle airport, Alaska's main hub, that the gates were very small and very close together, and it was very hard to discourage between my flight, and the flight next to us going to Boise and the flight next to that going to Denver. Denver. The audio for all three Gates was at the same level, and almost impossible to differentiate unless they actually said their flight number and location. Location. People tried to get on our plane, before they were ready, because they were confused about the Denver announcements. We were on a Boeing 737- 800 00, that must have recently been redone. It actually had USB--c ports which really surprised me. The Apu was out on the plane, so when we got on it was very very hot. A lot of people were complaining. The gate agents were very professional, but it was a lot going on and even though there were two of them, I think they could have used another person to help them. Mandy was particularly helpful in getting me a window seat. Flight crew was up to the usual Alaska airline standard, which is very high. Can we please get another snack then garlic pretzels? It would also be nice, if they knew ahead that the flight was full, to offer to let us check in our bags for free at baggage check, and not at the gate!

On time, good seats, not overly full, up beast positive crew.

Damage May baggage and I report the airport agant and they see it

Crew was very friendly. Need lay flat beds! More snacks

Good. Rxception is the Entertainment - movies and TV shows all out of date…

I liked the crew but not the uncomfortable seats and lack of movie and tv selection.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

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

Everything was good. Only issue comes from being vegan and flying. The food options are super limited.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

7 hours 15 min flight from SEA to Iceland with no inflight entertainment and no power to charge your own devices, also no meal service, not even any snacks/cookies. You have to buy food and the options are extremely limited (i.e. ham and cheese sandwich and spicy cup noodles). I didn't think Iceland air was a budget airline, maybe I was wrong, the cost of the ticket didn't feel like it though.

Very nice flight, easy connections in Keflavík, and friendly crew.

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

Information on your arrival and departure airports