SEA - KEF

$321 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 4/28. 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
$461
Overall average: $583
Icelandair
Tue 4/7Tue 4/14
SEA - KEF • Non-stop
Cheapest one-way
$321
Typical prices: $465-$608
Multiple Airlines
Tue 4/28
SEA - KEF • 2 stops
Top airlines
Icelandair
Cheapest • from $461 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 52% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 31% 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, Apr 7 - Tue, Apr 14
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$461Icelandair
Mon, Mar 30 - Tue, Apr 7
Icelandair Logo
3:40 pm - 6:15 am
SEA
-
KEF
7h 35mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$475Icelandair
Tue, Feb 24 - Mon, Mar 2
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$483Icelandair
Tue, Feb 24 - Thu, Mar 5
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$484Icelandair
Mon, Feb 23 - Mon, Mar 2
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$485Icelandair
Mon, Apr 20 - Wed, Apr 29
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$486Icelandair
Fri, Apr 17 - Tue, Apr 21
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$488Icelandair
Tue, Apr 21 - Wed, Apr 29
KLM Logo
11:59 am - 9:30 am
SEA
-
KEF
14h 31m
1 stop
KLM Logo
11:25 am - 8:00 pm
KEF
-
SEA
15h 35m
1 stop
$490KLM
Mon, Apr 20 - Wed, Apr 29
American Airlines Logo
8:20 pm - 10:00 am
SEA
-
KEF
30h 40m
1 stop
American Airlines Logo
11:00 am - 11:35 am
KEF
-
SEA
31h 35m
1 stop
$491American Airlines
Tue, Apr 21 - Wed, Apr 29
KLM Logo
7:23 am - 9:30 am
SEA
-
KEF
19h 07m
1 stop
KLM Logo
11:25 am - 11:59 pm
KEF
-
SEA
19h 34m
2 stops
$495KLM
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.

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 June and November, where the average cost of round-trip tickets is $730 and $701 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $606 on average.

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 52% 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$321
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 2% 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 $321 for a one-way ticket and $461 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, Virgin Atlantic, Delta, KLM, Scandinavian Airlines, American Airlines, Lufthansa, and United 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, and oneworld are the airline alliances operating flights between Seattle and Reykjavik-Keflavik Airport, with SkyTeam being the most commonly used for this route.

  • 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, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to Reykjavik are Alaska Airlines and Delta. With an average price for the route of $848 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $573 and an overall rating of 7.9.

  • 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 $352 or less one-way and $485 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 3 airlines serving 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.
8.0
Alaska AirlinesOverall score based on 11799 reviews
7.8Comfort
7.1Food
8.1Boarding
8.5Crew
7.0Entertainment
Airline reviews

There is nothing critical to complain about but I would say the snacks are pretty bad Airline staff could be aggressive the way they move through the aisles and the plane I also got hustled for a small wallet size men bag and force the consolidated with my carry on item we're talking about a wallet size bag.

6.0 Goodrsmrostov, Jan 2026
SEA - BOS
Read more Alaska Airlines reviews

There is nothing critical to complain about but I would say the snacks are pretty bad Airline staff could be aggressive the way they move through the aisles and the plane I also got hustled for a small wallet size men bag and force the consolidated with my carry on item we're talking about a wallet size bag.

Departed on time and had an efficient boarding process. The inflight wifi was not working on one of the flights.

How can I review what was denied to me. Instead of offering to let me pay for the ticket I got booted of my flight with no way home and no choice but to purchase another ticket for 12 hours later. Filing a complaint with the DOT

From Las Vegas to Boise all went well. However, our flight was delayed in Boise and I missed my connecting flight from Seattle to Pasco. Moreover, the last flight to Pasco was full and I was booked on the 11:30 flight Sunday and given a hotel accommodation. However, I was scheduled to deliver the Sunday morning service at my church and needed to arrive no later than 10:00. Therefore, I booked a Delta flight scheduled to arrive in Pasco at 23:09. My piece of luggage checked in Las Vegas arrived in Pasco earlier today. I waited at the airport for over an hour last night to speak with an Alaska agent to no avail. I went back after church this morning in search of my piece of luggage and it could not be located. After waiting for 40 minutes to speak to the agent authorized to take my claim, he announced that he was closing the counter to assist on the flight line but not before providing me with a telephone number that would help me with filing my claim. Before I was able to make the call (due to other factors) I received a call from Alaska agent informing me that my luggage had just arrived and I am now waiting for it to be delivered. I deliberately took the more complicated route home to ensure that I would be home in plenty of time to prepare for myself for the Sunday service and accommodate my relatives’ needs. I believe the airport is undermanned given the number of flights coming in and going out. It was fiasco last night with three flights waiting for luggage and another flight landing within minutes. Today’s problems stemmed from a lack of cross training and a serious amount of cargo/baggage going out and too few people scheduled to cover.

The cabin crew was absolutely wonderful, the service was great and it was just a good flight overall.

I like them since I live in Alaska and I don't have much choice

The flight attendants were nice, but the cabin and seats were uncomfortable.

Food was terrible, noisy plane & would never pay to fly first class again. Seats in regular price are too small, no leg room & center aisle much too, too small. Seats in 1st class larger but not comfortable.

Overall, once we took off, our flight was good. Flight departure was significantly delayed due to mechanical issues. Upon arrival, it took wayyy too long to retrieve checked bags.

The ticket I purchased through Kayak did not show up in my Alaska Airlines app, and neither of the codes given to me worked for online check in. I've never had to show up to the airport at 6am wondering if I've been scammed. Cheap flight fare or whatever does not play well with airlines and I will be wary of using Kayak in the future.

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

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.

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

Information on your arrival and departure airports