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Cheap flights from Reykjavik Keflavik Intl Airport to Seattle from $336

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 9/24. 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

Scandinavian Airlines Logo
5:40 pm - 1:50 pmKEF-SEA
27h 10m1 stop
Scandinavian Airlines Logo
4:00 pm - 4:20 pmSEA-KEF
17h 20m1 stop
$562Scandinavian Airlines
Find Deal
jue., ago. 28 - lun., sep. 8
Scandinavian Airlines Logo
5:10 pm - 1:50 pmKEF-SEA
27h 40m1 stop
Scandinavian Airlines Logo
4:00 pm - 4:20 pmSEA-KEF
17h 20m1 stop
$566Scandinavian Airlines
Find Deal
jue., sep. 4 - dom., sep. 7
Scandinavian Airlines Logo
11:05 am - 1:50 pmKEF-SEA
33h 45m2 stops
Scandinavian Airlines Logo
4:00 pm - 4:20 pmSEA-KEF
17h 20m1 stop
$581Scandinavian Airlines
Find Deal
jue., ago. 28 - lun., sep. 8
Scandinavian Airlines Logo
5:10 pm - 2:00 pmKEF-SEA
27h 50m1 stop
Scandinavian Airlines Logo
4:20 pm - 4:20 pmSEA-KEF
17h 00m1 stop
$583Scandinavian Airlines
Find Deal
mar., oct. 14 - mié., oct. 22
Scandinavian Airlines Logo
5:10 pm - 2:00 pmKEF-SEA
27h 50m1 stop
Scandinavian Airlines Logo
4:20 pm - 7:05 amSEA-KEF
31h 45m2 stops
$587Scandinavian Airlines
Find Deal
mar., oct. 14 - mié., oct. 22
Logo
3:05 pm - 10:27 pmKEF-SEA
14h 22m1 stop
Logo
9:29 pm - 4:55 amSEA-KEF
24h 26m1 stop
$615
Find Deal
vie., sep. 12 - vie., sep. 19
Icelandair Logo
5:05 pm - 5:00 pmKEF-SEA
7h 55mnonstop
Icelandair Logo
2:35 pm - 6:15 amSEA-KEF
7h 40mnonstop
$663Icelandair
Find Deal
dom., dic. 21 - vie., ene. 2
Icelandair Logo
10:30 am - 11:25 amKEF-SEA
7h 55mnonstop
Icelandair Logo
7:00 pm - 9:25 amSEA-KEF
7h 25mnonstop
$676Icelandair
Find Deal
dom., sep. 14 - mar., sep. 23
Icelandair Logo
10:30 am - 11:25 amKEF-SEA
7h 55mnonstop
Icelandair Logo
7:00 pm - 9:25 amSEA-KEF
7h 25mnonstop
$680Icelandair
Find Deal
dom., sep. 14 - mar., sep. 23
Icelandair Logo
10:30 am - 11:25 amKEF-SEA
7h 55mnonstop
Icelandair Logo
7:00 pm - 9:25 amSEA-KEF
7h 25mnonstop
$681Icelandair
Find Deal
dom., sep. 14 - mar., sep. 23

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
Aug 28
KEF5:40 pmReykjavik Keflavik Intl
27h 10m
1 stop
SEA1:50 pmSeattle/Tacoma Intl
Sep 8
SEA4:00 pmSeattle/Tacoma Intl
17h 20m
1 stop
KEF4:20 pmReykjavik Keflavik Intl
$562
Find similar
Scandinavian Airlines
Sep 4
KEF5:10 pmReykjavik Keflavik Intl
27h 40m
1 stop
SEA1:50 pmSeattle/Tacoma Intl
Sep 7
SEA4:00 pmSeattle/Tacoma Intl
17h 20m
1 stop
KEF4:20 pmReykjavik Keflavik Intl
$566
Find similar
Scandinavian Airlines
Aug 28
KEF11:05 amReykjavik Keflavik Intl
33h 45m
2 stops
SEA1:50 pmSeattle/Tacoma Intl
Sep 8
SEA4:00 pmSeattle/Tacoma Intl
17h 20m
1 stop
KEF4:20 pmReykjavik Keflavik Intl
$581
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
Dec 21
KEF5:05 pmReykjavik Keflavik Intl
7h 55m
SEA5:00 pmSeattle/Tacoma Intl
Jan 2
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
$663
Find similar
Icelandair
Sep 14
KEF10:30 amReykjavik Keflavik Intl
7h 55m
SEA11:25 amSeattle/Tacoma Intl
Sep 23
SEA7:00 pmSeattle/Tacoma Intl
7h 25m
KEF9:25 amReykjavik Keflavik Intl
$676
Find similar
Icelandair
Sep 14
KEF10:30 amReykjavik Keflavik Intl
7h 55m
SEA11:25 amSeattle/Tacoma Intl
Sep 23
SEA7:00 pmSeattle/Tacoma Intl
7h 25m
KEF9:25 amReykjavik Keflavik Intl
$680
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 julio 31, 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

jue. 8/28

5:40 pm-1:50 pm

1 stop27h 10m

Seattle/Tacoma Intl

lun. 9/8

4:00 pm-4:20 pm

1 stop17h 20m

$562

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

jue. 9/4

5:10 pm-1:50 pm

1 stop27h 40m

Seattle/Tacoma Intl

dom. 9/7

4:00 pm-4:20 pm

1 stop17h 20m

$566

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

jue. 8/28

11:05 am-1:50 pm

2 stops33h 45m

Seattle/Tacoma Intl

lun. 9/8

4:00 pm-4:20 pm

1 stop17h 20m

$581

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

mar. 10/14

5:10 pm-2:00 pm

1 stop27h 50m

Seattle/Tacoma Intl

mié. 10/22

4:20 pm-4:20 pm

1 stop17h 00m

$583

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

mar. 10/14

5:10 pm-2:00 pm

1 stop27h 50m

Seattle/Tacoma Intl

mié. 10/22

4:20 pm-7:05 am

2 stops31h 45m

$587

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

vie. 9/12

3:05 pm-10:27 pm

1 stop14h 22m

Seattle/Tacoma Intl

vie. 9/19

9:29 pm-4:55 am

1 stop24h 26m

$615

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

dom. 12/21

5:05 pm-5:00 pm

Nonstop7h 55m

Seattle/Tacoma Intl

vie. 1/2

2:35 pm-6:15 am

Nonstop7h 40m

$663

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

dom. 9/14

10:30 am-11:25 am

Nonstop7h 55m

Seattle/Tacoma Intl

mar. 9/23

7:00 pm-9:25 am

Nonstop7h 25m

$676

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

dom. 9/14

10:30 am-11:25 am

Nonstop7h 55m

Seattle/Tacoma Intl

mar. 9/23

7:00 pm-9:25 am

Nonstop7h 25m

$680

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

dom. 9/14

10:30 am-11:25 am

Nonstop7h 55m

Seattle/Tacoma Intl

mar. 9/23

7:00 pm-9:25 am

Nonstop7h 25m

$681

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $721. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday 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 $931.

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.

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

As of July 2025, prices for Reykjavik Keflavik Intl Airport to Seattle flights are approximately 35% cheaper 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

$336

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 $336. The best round-trip flight deal from Reykjavik Keflavik Intl Airport to Seattle found on momondo in the last 72 hours is $562.
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
520 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 20 flights on this route every week with an average price of $790. 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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Redmond

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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