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Cheap flights from Seattle to Reykjavik from $351

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 1/14. 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
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
$420Icelandair
Find Deal
Sun, Nov 16 - Tue, Nov 25
Icelandair Logo
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
$436Icelandair
Find Deal
Mon, Jan 12 - Wed, Jan 21
Icelandair Logo
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
$458Icelandair
Find Deal
Thu, Jan 22 - Sun, Jan 25
Icelandair Logo
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
Icelandair Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
$471Icelandair
Find Deal
Sun, Nov 16 - Tue, Nov 25
Multiple Airlines Logo
3:10 pm - 2:15 pmSEA-KEF
15h 05m1 stop
Multiple Airlines Logo
3:20 pm - 7:16 pmKEF-SEA
35h 56m2 stops
$509Multiple Airlines
Find Deal
Wed, Jan 21 - Tue, Jan 27
Lufthansa Logo
3:10 pm - 2:15 pmSEA-KEF
15h 05m1 stop
Lufthansa Logo
3:20 pm - 7:16 pmKEF-SEA
35h 56m2 stops
$513Lufthansa
Find Deal
Wed, Jan 21 - Tue, Jan 27
Lufthansa Logo
3:10 pm - 2:15 pmSEA-KEF
15h 05m1 stop
Lufthansa Logo
3:20 pm - 7:16 pmKEF-SEA
35h 56m2 stops
$514Lufthansa
Find Deal
Wed, Jan 21 - Tue, Jan 27
Multiple Airlines Logo
2:00 pm - 2:20 pmSEA-KEF
16h 20m1 stop
Multiple Airlines Logo
3:20 pm - 10:06 pmKEF-SEA
38h 46m2 stops
$521Multiple Airlines
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Thu, Jan 22 - Sun, Jan 25
Finnair Logo
11:51 am - 4:25 pmSEA-KEF
21h 34m2 stops
Finnair Logo
8:35 am - 11:05 pmKEF-SEA
21h 30m2 stops
$624Finnair
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Mon, Apr 20 - Thu, Apr 30
Finnair Logo
6:50 pm - 9:15 amSEA-KEF
30h 25m2 stops
Finnair Logo
9:45 am - 5:55 pmKEF-SEA
39h 10m2 stops
$662Finnair
Find Deal
Wed, Mar 4 - Wed, Mar 11

Icelandair flights from Seattle to Reykjavik Keflavik Intl Airport

Our best Icelandair deals on Seattle to Reykjavik Keflavik Intl Airport flight tickets
Icelandair
Nov 16
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
Nov 25
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
$420
Find similar
Icelandair
Nov 10
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
Nov 19
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
$421
Find similar
Icelandair
Jan 12
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
Jan 21
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
$436
Find similar

Lufthansa flights from Seattle to Reykjavik Keflavik Intl Airport

Our best Lufthansa deals on Seattle to Reykjavik Keflavik Intl Airport flight tickets
Lufthansa
Jan 21
SEA3:10 pmSeattle/Tacoma Intl
15h 05m
1 stop
KEF2:15 pmReykjavik Keflavik Intl
Jan 27
KEF3:20 pmReykjavik Keflavik Intl
35h 56m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$513
Find similar
Lufthansa
Jan 21
SEA3:10 pmSeattle/Tacoma Intl
15h 05m
1 stop
KEF2:15 pmReykjavik Keflavik Intl
Jan 27
KEF3:20 pmReykjavik Keflavik Intl
35h 56m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$514
Find similar
Lufthansa
Jan 15
SEA2:00 pmSeattle/Tacoma Intl
16h 20m
1 stop
KEF2:20 pmReykjavik Keflavik Intl
Jan 20
KEF3:20 pmReykjavik Keflavik Intl
30h 00m
2 stops
SEA1:20 pmSeattle/Tacoma Intl
$536
Find similar

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 November 2, 2025.
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

Sun 11/16

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 11/25

5:00 pm-5:00 pm

Nonstop8h 00m

$420

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 1/12

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Wed 1/21

5:00 pm-5:00 pm

Nonstop8h 00m

$436

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 1/22

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Sun 1/25

5:00 pm-5:00 pm

Nonstop8h 00m

$458

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 11/16

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 11/25

5:00 pm-5:00 pm

Nonstop8h 00m

$471

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 1/21

3:10 pm-2:15 pm

1 stop15h 05m

Reykjavik Keflavik Intl

Tue 1/27

3:20 pm-7:16 pm

2 stops35h 56m

$509

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 1/21

3:10 pm-2:15 pm

1 stop15h 05m

Reykjavik Keflavik Intl

Tue 1/27

3:20 pm-7:16 pm

2 stops35h 56m

$513

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 1/21

3:10 pm-2:15 pm

1 stop15h 05m

Reykjavik Keflavik Intl

Tue 1/27

3:20 pm-7:16 pm

2 stops35h 56m

$514

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 1/22

2:00 pm-2:20 pm

1 stop16h 20m

Reykjavik Keflavik Intl

Sun 1/25

3:20 pm-10:06 pm

2 stops38h 46m

$521

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 4/20

11:51 am-4:25 pm

2 stops21h 34m

Reykjavik Keflavik Intl

Thu 4/30

8:35 am-11:05 pm

2 stops21h 30m

$624

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 3/4

6:50 pm-9:15 am

2 stops30h 25m

Reykjavik Keflavik Intl

Wed 3/11

9:45 am-5:55 pm

2 stops39h 10m

$662

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 typical price of a round-trip flight between Seattle and Reykjavik Keflavik Intl Airport?

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 $447. If you’re not able to fly to Reykjavik Keflavik Intl Airport in October, then August is your next best option. Flight prices from Seattle to Reykjavik Keflavik Intl Airport during August 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 $615. The most expensive day to fly to Reykjavik Keflavik Intl Airport is Thursday, with ticket prices averaging around $650.

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 in the morning when flights can be purchased for as low as $533. Flights in the evening are often more expensive with an average ticket price of $654.

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 $701 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 $505 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 45% 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 November 2025, prices for Seattle to Reykjavik Keflavik Intl Airport flights are approximately 5% 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

$410

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 $410. The best round-trip flight deal from Seattle to Reykjavik Keflavik Intl Airport found on momondo in the last 72 hours is $459.
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
8,001 reviews
Search Delta flights
IcelandairPriceFrom $396Free CancellationRating
7.1
566 reviews
Search Icelandair flights

  • Icelandair Flights From Seattle to Reykjavik Keflavik Intl Airport

    Icelandair is one of the most popular airlines flying from Seattle to Reykjavik Keflavik Intl Airport, operating 2 flights/week on average for this route. A good Icelandair flight deal for Seattle to Reykjavik Keflavik Intl Airport starts from $396 round-trip, up to an average price of $678. Our users have rated Icelandair 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
Hveragerdi
Borgarnes
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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