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Cheap flights from Seattle to Reykjavik from $344

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Reykjavik departing on 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Reykjavik

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
Tue, Apr 7 - Tue, Apr 14
Icelandair Logo
3:40 pm - 6:15 am
SEA
-
KEF
7h 35mnonstop
Icelandair Logo
4:50 pm - 5:55 pm
KEF
-
SEA
8h 05mnonstop
$468Icelandair
Mon, Mar 30 - Wed, Apr 8
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
$469Icelandair
Thu, Feb 19 - Wed, Feb 25
Icelandair Logo
3:40 pm - 6:15 am
SEA
-
KEF
7h 35mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$482Icelandair
Mon, Mar 30 - Wed, Apr 8
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$484Icelandair
Fri, Apr 17 - Tue, Apr 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
$485Icelandair
Tue, Feb 24 - Thu, Mar 5
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
Mon, Apr 20 - Wed, Apr 29
Icelandair Logo
3:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
$488Icelandair
Sun, Mar 8 - Tue, Mar 31
Delta Logo
1:45 pm - 9:30 am
SEA
-
KEF
12h 45m
1 stop
Delta Logo
11:25 am - 7:59 pm
KEF
-
SEA
15h 34m
1 stop
$490Delta
Wed, Apr 8 - Wed, Apr 22
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
Mon, Apr 20 - Wed, Apr 29

Delta flights from Seattle to Reykjavik Keflavik Intl Airport

Our best Delta deals on Seattle to Reykjavik Keflavik Intl Airport flight tickets
Delta
Apr 8
SEA1:45 pmSeattle/Tacoma Intl
12h 45m
1 stop
KEF9:30 amReykjavik Keflavik Intl
Apr 22
KEF11:25 amReykjavik Keflavik Intl
15h 34m
1 stop
SEA7:59 pmSeattle/Tacoma Intl
$490
Delta
Apr 8
SEA10:58 pmSeattle/Tacoma Intl
27h 32m
1 stop
KEF9:30 amReykjavik Keflavik Intl
May 5
KEF11:25 amReykjavik Keflavik Intl
18h 06m
1 stop
SEA10:31 pmSeattle/Tacoma Intl
$531
Delta
Apr 7
SEA7:35 pmSeattle/Tacoma Intl
54h 55m
2 stops
KEF9:30 amReykjavik Keflavik Intl
May 8
KEF8:50 amReykjavik Keflavik Intl
18h 39m
1 stop
SEA8:29 pmSeattle/Tacoma Intl
$541

Lufthansa flights from Seattle to Reykjavik Keflavik Intl Airport

Our best Lufthansa deals on Seattle to Reykjavik Keflavik Intl Airport flight tickets
Lufthansa
Apr 7
SEA2:10 pmSeattle/Tacoma Intl
35h 15m
2 stops
KEF8:25 amReykjavik Keflavik Intl
May 7
KEF2:10 pmReykjavik Keflavik Intl
31h 10m
2 stops
SEA2:20 pmSeattle/Tacoma Intl
$563
Lufthansa
Apr 7
SEA2:10 pmSeattle/Tacoma Intl
35h 15m
2 stops
KEF8:25 amReykjavik Keflavik Intl
May 5
KEF2:10 pmReykjavik Keflavik Intl
33h 49m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$587

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Reykjavik Keflavik Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Seattle to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 4/7

7:00 pm-9:25 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Tue 4/14

7:45 pm-8:40 pm

Nonstop7h 55m

$461

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 3/30

3:40 pm-6:15 am

Nonstop7h 35m

Reykjavik Keflavik Intl

Wed 4/8

4:50 pm-5:55 pm

Nonstop8h 05m

$468

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 2/19

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Wed 2/25

5:00 pm-5:00 pm

Nonstop8h 00m

$469

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 3/30

3:40 pm-6:15 am

Nonstop7h 35m

Reykjavik Keflavik Intl

Wed 4/8

7:45 pm-8:40 pm

Nonstop7h 55m

$482

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 4/17

7:00 pm-9:25 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Tue 4/21

7:45 pm-8:40 pm

Nonstop7h 55m

$484

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 2/24

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Thu 3/5

5:00 pm-5:00 pm

Nonstop8h 00m

$485

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 4/20

7:00 pm-9:25 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Wed 4/29

7:45 pm-8:40 pm

Nonstop7h 55m

$486

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 3/8

3:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 3/31

7:45 pm-8:40 pm

Nonstop7h 55m

$488

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 4/8

1:45 pm-9:30 am

1 stop12h 45m

Reykjavik Keflavik Intl

Wed 4/22

11:25 am-7:59 pm

1 stop15h 34m

$490

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 4/20

8:20 pm-10:00 am

1 stop30h 40m

Reykjavik Keflavik Intl

Wed 4/29

11:00 am-11:35 am

1 stop31h 35m

$491

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Reykjavik from

How to get the cheapest flight ticket from Seattle to Reykjavik Keflavik Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

The month of October is, on average, the cheapest month to fly to Reykjavik Keflavik Intl Airport from Seattle, with most prices found around $441. If you’re not able to fly to Reykjavik Keflavik Intl Airport in October, then January is your next best option. Flight prices from Seattle to Reykjavik Keflavik Intl Airport during January average around $560.

What is the cheapest day to depart on your flight to Reykjavik Keflavik Intl Airport?

The cheapest day to depart from Seattle to Reykjavik Keflavik Intl Airport is on a Wednesday when prices can be found for as low as $582. The most expensive day to fly to Reykjavik Keflavik Intl Airport is Thursday, with ticket prices averaging around $624.

What is the cheapest time of day to depart on your flight to Reykjavik Keflavik Intl Airport?

The cheapest time of day to fly to Reykjavik Keflavik Intl Airport is at noon when flights can be purchased for as low as $544. Flights in the evening are often more expensive with an average ticket price of $628.

What is the cheapest Seattle/Tacoma Intl to Reykjavik Keflavik Intl flight route?

Fly from Seattle/Tacoma Intl to Reykjavik Keflavik Intl for the best Seattle/Tacoma Intl - Reykjavik Keflavik Intl flight prices

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

You are more likely to see cheaper flights to Reykjavik Keflavik Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Reykjavik Keflavik Intl Airport for around $635 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Reykjavik Keflavik Intl Airport from Seattle for as low as $486 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Reykjavik Keflavik Intl flights?

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Reykjavik Keflavik Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Reykjavik Keflavik Intl Airport flights?

You could potentially save up to 41% on your flight if you consider stops on a Seattle to Reykjavik Keflavik Intl Airport flight.

How have Seattle to Reykjavik Keflavik Intl Airport flight prices changed over time?

As of January 2026, prices for Seattle to Reykjavik Keflavik Intl Airport flights are approximately 18% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Reykjavik Keflavik Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Reykjavik Keflavik Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Reykjavik Keflavik Intl Airport (SEA to KEF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Reykjavik Keflavik Intl Airport

Best Price Found

$352

Fastest flight time

7h 25m

Direct flights

Every day
The best one-way flight to Reykjavik Keflavik Intl Airport from Seattle in the past 72 hours is $352. The best round-trip flight deal from Seattle to Reykjavik Keflavik Intl Airport found on momondo in the last 72 hours is $485.
The fastest flight from Seattle to Reykjavik Keflavik Intl Airport takes 7h 25m
Direct flights go from Seattle to Reykjavik Keflavik Intl Airport every day.
Search flight deals

  • How far is Seattle/Tacoma Intl to Reykjavik Keflavik Intl by plane?

    The distance between Seattle/Tacoma Intl and Reykjavik Keflavik Intl is about 3599.8 mi. A reasonable flight in good conditions will take 7h 25m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport.

  • What documentation or ID do you need to fly to Reykjavik Keflavik Intl Airport?

    The necessary travel and health documents for your Reykjavik Keflavik Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Reykjavik Keflavik Intl Airport?

  • What is the most popular airline from Seattle to Reykjavik Keflavik Intl Airport?

Best airlines flying from Seattle to Reykjavik Keflavik Intl Airport

Compare and see reviews for airlines that fly from Seattle to Reykjavik Keflavik Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $323Free CancellationRating
7.9
8,127 reviews
Search Delta flights
IcelandairPriceFrom $391Free CancellationRating
7.1
606 reviews
Search Icelandair flights
Alaska AirlinesPriceFrom $743Free CancellationRating
8.0
11,808 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Reykjavik Keflavik Intl Airport

    Alaska Airlines is one of the most popular airlines flying from Seattle to Reykjavik Keflavik Intl Airport, operating 7 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Reykjavik Keflavik Intl Airport starts from $743 round-trip, up to an average price of $848. Our users have rated Alaska Airlines at 8.0/10.

  • Icelandair Flights From Seattle to Reykjavik Keflavik Intl Airport

    The best Icelandair deal for Seattle to Reykjavik Keflavik Intl Airport flight tickets found on momondo in the last 72 hours was $391, round-trip. It should be noted that an average Icelandair flight deal for this route in this time was higher, at $627 round-trip. Icelandair operates 5 flights out of Seattle into Reykjavik Keflavik Intl Airport in an average week, so prices vary by time and availability. 606 Icelandair reviews by users on momondo have scored the airline at 7.1/10.

Traveling to a place near Reykjavik?

Book flights to Reykjavik if you plan to visit one of these locations
Keflavik
Selfoss
Hella
Borgarnes
Hveragerdi
Grindavik
Kopavogur

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Reykjavik?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Reykjavik from Seattle.

Can I find flights from Seattle to Reykjavik with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Reykjavik flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Reykjavik?

Once all potential Seattle to Reykjavik flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Reykjavik right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Reykjavik flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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