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Cheap flights from Reykjavik Keflavik Intl Airport to Seattle from $481

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Reykjavik Keflavik Intl Airport to Seattle departing on 10/19. 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 Reykjavik Keflavik Intl Airport to Seattle

Cheap round-trip flights

Icelandair Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
Icelandair Logo
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
$640Icelandair
Find Deal
Fri, Nov 7 - Thu, Nov 13
Icelandair Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
Icelandair Logo
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
$643Icelandair
Find Deal
Fri, Nov 7 - Thu, Nov 13
Scandinavian Airlines Logo
7:35 am - 10:22 pmKEF-SEA
22h 47m2 stops
Scandinavian Airlines Logo
10:40 am - 11:55 pmSEA-KEF
29h 15m2 stops
$806Scandinavian Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
Multiple Airlines Logo
5:00 pm - 5:00 pmKEF-SEA
8h 00mnonstop
Multiple Airlines Logo
6:25 pm - 6:35 amSEA-KEF
28h 10m1 stop
$833Multiple Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
Scandinavian Airlines Logo
7:35 am - 10:27 pmKEF-SEA
22h 52m2 stops
Scandinavian Airlines Logo
12:20 pm - 11:55 pmSEA-KEF
27h 35m2 stops
$835Scandinavian Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
Multiple Airlines Logo
5:00 pm - 7:05 pmKEF-SEA
34h 05m1 stop
Multiple Airlines Logo
11:22 am - 6:05 amSEA-KEF
10h 43m1 stop
$880Multiple Airlines
Find Deal
Sun, Feb 8 - Sat, Feb 28
American Airlines Logo
6:10 pm - 11:30 amKEF-SEA
25h 20m1 stop
American Airlines Logo
6:50 pm - 10:55 amSEA-KEF
32h 05m1 stop
$946American Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
American Airlines Logo
6:10 pm - 11:30 amKEF-SEA
25h 20m1 stop
American Airlines Logo
6:50 pm - 10:55 amSEA-KEF
32h 05m1 stop
$968American Airlines
Find Deal
Fri, Nov 7 - Thu, Nov 13
Delta Logo
11:25 am - 8:16 pmKEF-SEA
15h 51m1 stop
Delta Logo
5:59 pm - 6:20 amSEA-KEF
29h 21m2 stops
$988Delta
Find Deal
Fri, Sep 26 - Fri, Oct 17
Delta Logo
11:25 am - 10:22 pmKEF-SEA
17h 57m1 stop
Delta Logo
11:43 am - 6:20 amSEA-KEF
11h 37m1 stop
$994Delta
Find Deal
Thu, Oct 16 - Mon, Oct 20

Scandinavian Airlines flights from Reykjavik Keflavik Intl Airport to Seattle

Our best Scandinavian Airlines deals on Reykjavik Keflavik Intl Airport to Seattle flight tickets
Scandinavian Airlines
Nov 7
KEF7:35 amReykjavik Keflavik Intl
22h 47m
2 stops
SEA10:22 pmSeattle/Tacoma Intl
Nov 13
SEA10:40 amSeattle/Tacoma Intl
29h 15m
2 stops
KEF11:55 pmReykjavik Keflavik Intl
$806
Find similar
Scandinavian Airlines
Nov 7
KEF7:35 amReykjavik Keflavik Intl
22h 52m
2 stops
SEA10:27 pmSeattle/Tacoma Intl
Nov 13
SEA12:20 pmSeattle/Tacoma Intl
27h 35m
2 stops
KEF11:55 pmReykjavik Keflavik Intl
$835
Find similar
Scandinavian Airlines
Nov 7
KEF7:50 amReykjavik Keflavik Intl
22h 35m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
Nov 13
SEA7:10 amSeattle/Tacoma Intl
32h 45m
2 stops
KEF11:55 pmReykjavik Keflavik Intl
$841
Find similar

Icelandair flights from Reykjavik Keflavik Intl Airport to Seattle

Our best Icelandair deals on Reykjavik Keflavik Intl Airport to Seattle flight tickets
Icelandair
Nov 7
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
Nov 13
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
$640
Find similar
Icelandair
Nov 7
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
Nov 13
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
$643
Find similar
Icelandair
Nov 7
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
Nov 13
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
$647
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Reykjavik Keflavik Intl Airport to Seattle 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 September 16, 2025.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

5:00 pm-5:00 pm

Nonstop8h 00m

Seattle/Tacoma Intl

Thu 11/13

2:35 pm-6:15 am

Nonstop7h 40m

$640

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

5:00 pm-5:00 pm

Nonstop8h 00m

Seattle/Tacoma Intl

Thu 11/13

2:35 pm-6:15 am

Nonstop7h 40m

$643

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

7:35 am-10:22 pm

2 stops22h 47m

Seattle/Tacoma Intl

Thu 11/13

10:40 am-11:55 pm

2 stops29h 15m

$806

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

5:00 pm-5:00 pm

Nonstop8h 00m

Seattle/Tacoma Intl

Thu 11/13

6:25 pm-6:35 am

1 stop28h 10m

$833

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

7:35 am-10:27 pm

2 stops22h 52m

Seattle/Tacoma Intl

Thu 11/13

12:20 pm-11:55 pm

2 stops27h 35m

$835

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Sun 2/8

5:00 pm-7:05 pm

1 stop34h 05m

Seattle/Tacoma Intl

Sat 2/28

11:22 am-6:05 am

1 stop10h 43m

$880

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

6:10 pm-11:30 am

1 stop25h 20m

Seattle/Tacoma Intl

Thu 11/13

6:50 pm-10:55 am

1 stop32h 05m

$946

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 11/7

6:10 pm-11:30 am

1 stop25h 20m

Seattle/Tacoma Intl

Thu 11/13

6:50 pm-10:55 am

1 stop32h 05m

$968

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 9/26

11:25 am-8:16 pm

1 stop15h 51m

Seattle/Tacoma Intl

Fri 10/17

5:59 pm-6:20 am

2 stops29h 21m

$988

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Thu 10/16

11:25 am-10:22 pm

1 stop17h 57m

Seattle/Tacoma Intl

Mon 10/20

11:43 am-6:20 am

1 stop11h 37m

$994

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 Seattle from

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

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 day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Reykjavik Keflavik Intl Airport is on a Monday. momondo users have found tickets for Monday departures for as low as $784. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Tuesday is the most expensive day to depart from Reykjavik Keflavik Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $976.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Reykjavik Keflavik Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $652 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $903. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

There are 3 cabin classes available to choose from on Reykjavik Keflavik Intl to Seattle/Tacoma 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 Reykjavik Keflavik Intl Airport to Seattle flights?

You could potentially save up to 18% on your flight if you consider stops on a Reykjavik Keflavik Intl Airport to Seattle flight.

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

As of September 2025, prices for Reykjavik Keflavik Intl Airport to Seattle flights are approximately 19% more expensive when compared to flights at the same time last year.

When to book flights from Reykjavik Keflavik Intl Airport to Seattle

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

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

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

Best Price Found

$578

Fastest flight time

7h 55m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Reykjavik Keflavik Intl Airport in the past 72 hours is $578. The best round-trip flight deal from Reykjavik Keflavik Intl Airport to Seattle found on momondo in the last 72 hours is $977.
The fastest flight from Reykjavik Keflavik Intl Airport to Seattle takes 7h 55m
Direct flights go from Reykjavik Keflavik Intl Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

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

    The distance between Reykjavik Keflavik Intl and Seattle/Tacoma Intl is about 3599.8 mi. Flights usually cover this in 7h 55m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Reykjavik Keflavik Intl Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

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

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

Best airlines flying from Reykjavik Keflavik Intl Airport to Seattle

Compare and see reviews for airlines that fly from Reykjavik Keflavik Intl Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $639Free CancellationRating
7.0
544 reviews
Search Icelandair flights

  • Icelandair Flights From Reykjavik Keflavik Intl Airport to Seattle

    The lowest priced Icelandair flight from Reykjavik Keflavik Intl Airport to Seattle from the last 72 hours was $639. Generally, Icelandair has 14 flights on this route every week with an average price of $798. Icelandair is rated 7.0/10 by our users.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
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Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Reykjavik to Seattle. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Seattle from Reykjavik on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Reykjavik to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Seattle from Reykjavik are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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