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Cheap flights from Reykjavik Keflavik Intl Airport to Seattle from $375

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 9/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Reykjavik Keflavik Intl Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
Icelandair Logo
3:40 pm - 6:15 am
SEA
-
KEF
7h 35mnonstop
$598Icelandair
Mon, Aug 3 - Wed, Aug 12
Icelandair Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
Icelandair Logo
11:25 pm - 2:00 pm
SEA
-
KEF
7h 35mnonstop
$612Icelandair
Mon, Aug 3 - Wed, Aug 12
Alaska Airlines Logo
12:45 pm - 1:40 pm
KEF
-
SEA
7h 55mnonstop
Alaska Airlines Logo
6:35 pm - 9:00 am
SEA
-
KEF
7h 25mnonstop
$626Alaska Airlines
Mon, Aug 3 - Wed, Aug 12
Icelandair Logo
5:00 pm - 5:00 pm
KEF
-
SEA
8h 00mnonstop
Icelandair Logo
2:35 pm - 6:15 am
SEA
-
KEF
7h 40mnonstop
$627Icelandair
Fri, Dec 11 - Mon, Dec 14
Icelandair Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
Icelandair Logo
3:40 pm - 6:15 am
SEA
-
KEF
7h 35mnonstop
$636Icelandair
Mon, Aug 24 - Sun, Aug 30
Icelandair Logo
7:45 pm - 8:40 pm
KEF
-
SEA
7h 55mnonstop
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
$641Icelandair
Sun, Oct 11 - Mon, Oct 19
Alaska Airlines Logo
12:45 pm - 1:40 pm
KEF
-
SEA
7h 55mnonstop
Alaska Airlines Logo
6:35 pm - 9:00 am
SEA
-
KEF
7h 25mnonstop
$646Alaska Airlines
Thu, Aug 20 - Thu, Aug 27
Icelandair Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
$658Icelandair
Mon, Aug 3 - Wed, Aug 12
Icelandair Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
Icelandair Logo
7:00 pm - 9:25 am
SEA
-
KEF
7h 25mnonstop
$659Icelandair
Mon, Aug 3 - Wed, Aug 12
Icelandair Logo
10:40 am - 11:45 am
KEF
-
SEA
8h 05mnonstop
Icelandair Logo
11:25 pm - 2:00 pm
SEA
-
KEF
7h 35mnonstop
$660Icelandair
Fri, Jul 24 - Fri, Jul 31

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Icelandair flights from Reykjavik Keflavik Intl Airport to Seattle

Our best Icelandair deals on Reykjavik Keflavik Intl Airport to Seattle flight tickets
Icelandair
Aug 3
KEF10:40 amReykjavik Keflavik Intl
8h 05m
SEA11:45 amSeattle/Tacoma Intl
Aug 12
SEA3:40 pmSeattle/Tacoma Intl
7h 35m
KEF6:15 amReykjavik Keflavik Intl
$598
Icelandair
Aug 3
KEF10:40 amReykjavik Keflavik Intl
8h 05m
SEA11:45 amSeattle/Tacoma Intl
Aug 12
SEA11:25 pmSeattle/Tacoma Intl
7h 35m
KEF2:00 pmReykjavik Keflavik Intl
$612
Icelandair
Dec 11
KEF5:00 pmReykjavik Keflavik Intl
8h 00m
SEA5:00 pmSeattle/Tacoma Intl
Dec 14
SEA2:35 pmSeattle/Tacoma Intl
7h 40m
KEF6:15 amReykjavik Keflavik Intl
$627

Alaska Airlines flights from Reykjavik Keflavik Intl Airport to Seattle

Our best Alaska Airlines deals on Reykjavik Keflavik Intl Airport to Seattle flight tickets
Alaska Airlines
Aug 3
KEF12:45 pmReykjavik Keflavik Intl
7h 55m
SEA1:40 pmSeattle/Tacoma Intl
Aug 12
SEA6:35 pmSeattle/Tacoma Intl
7h 25m
KEF9:00 amReykjavik Keflavik Intl
$626
Alaska Airlines
Aug 20
KEF12:45 pmReykjavik Keflavik Intl
7h 55m
SEA1:40 pmSeattle/Tacoma Intl
Aug 27
SEA6:35 pmSeattle/Tacoma Intl
7h 25m
KEF9:00 amReykjavik Keflavik Intl
$646
Alaska Airlines
Jul 9
KEF12:45 pmReykjavik Keflavik Intl
7h 55m
SEA1:40 pmSeattle/Tacoma Intl
Jul 15
SEA6:35 pmSeattle/Tacoma Intl
7h 25m
KEF9:00 amReykjavik Keflavik Intl
$653

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 July 6, 2026.
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

Cheapest round-trip

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 8/3

10:40 am-11:45 am

Nonstop8h 05m

Seattle/Tacoma Intl

Wed 8/12

3:40 pm-6:15 am

Nonstop7h 35m

$598

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 8/3

10:40 am-11:45 am

Nonstop8h 05m

Seattle/Tacoma Intl

Wed 8/12

11:25 pm-2:00 pm

Nonstop7h 35m

$612
Quickest round-trip

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 8/3

12:45 pm-1:40 pm

Nonstop7h 55m

Seattle/Tacoma Intl

Wed 8/12

6:35 pm-9:00 am

Nonstop7h 25m

$626

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 12/11

5:00 pm-5:00 pm

Nonstop8h 00m

Seattle/Tacoma Intl

Mon 12/14

2:35 pm-6:15 am

Nonstop7h 40m

$627

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 8/24

10:40 am-11:45 am

Nonstop8h 05m

Seattle/Tacoma Intl

Sun 8/30

3:40 pm-6:15 am

Nonstop7h 35m

$636

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Sun 10/11

7:45 pm-8:40 pm

Nonstop7h 55m

Seattle/Tacoma Intl

Mon 10/19

7:00 pm-9:25 am

Nonstop7h 25m

$641

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Thu 8/20

12:45 pm-1:40 pm

Nonstop7h 55m

Seattle/Tacoma Intl

Thu 8/27

6:35 pm-9:00 am

Nonstop7h 25m

$646

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 8/3

10:40 am-11:45 am

Nonstop8h 05m

Seattle/Tacoma Intl

Wed 8/12

7:00 pm-9:25 am

Nonstop7h 25m

$658

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 8/3

10:40 am-11:45 am

Nonstop8h 05m

Seattle/Tacoma Intl

Wed 8/12

7:00 pm-9:25 am

Nonstop7h 25m

$659

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Fri 7/24

10:40 am-11:45 am

Nonstop8h 05m

Seattle/Tacoma Intl

Fri 7/31

11:25 pm-2:00 pm

Nonstop7h 35m

$660

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 Friday. momondo users have found tickets for Friday departures for as low as $723. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday 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 $1,439.

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

Flying to Seattle from Reykjavik Keflavik Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $831 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $933. 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 Airport to Seattle flights?

There are 2 cabin classes available to choose from on Reykjavik Keflavik Intl Airport to Seattle 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 26% 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?

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

Fastest flight time

7h 55m

Direct flights

Every day

Airports in Seattle

1 airport
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 in Seattle. From Reykjavik Keflavik Intl Airport there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Reykjavik Keflavik Intl Airport to Seattle

  • 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 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?

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Redmond
Kent
Lakewood
Puyallup
Tukwila
Cle Elum
Federal Way
Fife
Marysville
Centralia
Kirkland
Shoreline
Westport

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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