HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$315+ Cheap flights from Keflavik Intl (KEF) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — SEA
Jan 21 — Jan 281
Tue 1/21
Tue 1/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Keflavik Intl to Seattle with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Keflavik Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Keflavik Intl (KEF) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$565
(Gotogate)

One-way from

$315
(Kiwi.com)

Popular in

December

Cheapest in

March
Provider with most accurate pricing for Reykjavik Keflavik Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Reykjavik Keflavik Intl-Seattle/Tacoma Intl flights.
Search Deals
From Reykjavik Keflavik Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Reykjavik Keflavik Intl to Seattle/Tacoma Intl
Search Deals
High demand for flights, 41% potential price rise
Search Deals
Best time to find cheap flights, 8% potential price drop
Search Deals

Find flight deals from Keflavik Intl to Seattle

Cheapest flights from Keflavik Intl to Seattle
Explore the most affordable flight options available from Keflavik Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2025.

This Gotogate deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/105:05 pmKEF - SEA
Nonstop7h 55mIcelandair
Tue 3/183:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Deal found 1/16$565
This Justfly.com deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/33:40 pmKEF - SEA
2 stops38h 41mScandinavian Airlines
Tue 3/112:00 pmSEA - KEF
2 stops26h 20mScandinavian Airlines
Deal found 1/15$567
This Mytrip deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/104:00 pmKEF - SEA
3 stops34h 02mMultiple Airlines
Tue 3/1812:41 pmSEA - KEF
3 stops33h 04mMultiple Airlines
Deal found 1/16$673
This United Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1811:00 amKEF - SEA
2 stops16h 10mUnited Airlines
Mon 9/2911:50 pmSEA - KEF
2 stops25h 45mUnited Airlines
Deal found 1/16$772
This Flighttix deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2310:00 amKEF - SEA
1 stop32h 16mAir Canada
Sun 7/2712:20 pmSEA - KEF
1 stop13h 15mAir Canada
Deal found 1/16$784
This Lufthansa deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/12:20 pmKEF - SEA
2 stops31h 00mLufthansa
Sat 2/88:00 amSEA - KEF
2 stops22h 15mLufthansa
Deal found 1/16$881
This WestJet deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/109:50 amKEF - SEA
2 stops33h 41mWestJet
Sun 7/137:05 amSEA - KEF
1 stop18h 25mWestJet
Deal found 1/16$906
This British Airways deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1011:45 amKEF - SEA
1 stop31h 35mBritish Airways
Tue 3/181:25 pmSEA - KEF
2 stops38h 20mBritish Airways
Deal found 1/16$912
This Turkish Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/107:50 amKEF - SEA
2 stops41h 15mTurkish Airlines
Tue 3/188:00 pmSEA - KEF
2 stops36h 20mTurkish Airlines
Deal found 1/16$993
This American Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1011:45 amKEF - SEA
1 stop31h 35mAmerican Airlines
Tue 3/188:50 amSEA - KEF
2 stops19h 00mAmerican Airlines
Deal found 1/16$1,199

Find flights from Keflavik Intl to Seattle within your budget

Customize your flight search to find flights from Keflavik Intl 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, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 3/10

5:05 pm-6:00 pm

Nonstop7h 55m

Seattle/Tacoma Intl

Tue 3/18

3:35 pm-6:15 am

Nonstop7h 40m

$565

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 3/3

3:40 pm-10:21 pm

2 stops38h 41m

Seattle/Tacoma Intl

Tue 3/11

2:00 pm-11:20 pm

2 stops26h 20m

$567

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 3/10

4:00 pm-7:02 pm

3 stops34h 02m

Seattle/Tacoma Intl

Tue 3/18

12:41 pm-4:45 am

3 stops33h 04m

$673

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 6/23

10:00 am-11:16 am

1 stop32h 16m

Seattle/Tacoma Intl

Sun 7/27

12:20 pm-8:35 am

1 stop13h 15m

$784

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Sat 2/1

2:20 pm-1:20 pm

2 stops31h 00m

Seattle/Tacoma Intl

Sat 2/8

8:00 am-2:15 pm

2 stops22h 15m

$881

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Thu 7/10

9:50 am-12:31 pm

2 stops33h 41m

Seattle/Tacoma Intl

Sun 7/13

7:05 am-8:30 am

1 stop18h 25m

$906

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 3/10

11:45 am-12:20 pm

1 stop31h 35m

Seattle/Tacoma Intl

Tue 3/18

1:25 pm-10:45 am

2 stops38h 20m

$912

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 3/10

7:50 am-6:05 pm

2 stops41h 15m

Seattle/Tacoma Intl

Tue 3/18

8:00 pm-3:20 pm

2 stops36h 20m

$993

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Mon 3/10

11:45 am-12:20 pm

1 stop31h 35m

Seattle/Tacoma Intl

Tue 3/18

8:50 am-10:50 am

2 stops19h 00m

$1,199

ReykjavikSeattle

KEF - SEA

KEFSEA

Reykjavik Keflavik Intl

Thu 7/10

10:00 am-10:29 pm

2 stops19h 29m

Seattle/Tacoma Intl

Sun 7/13

7:03 am-8:35 am

3 stops18h 32m

$1,362

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 20 results
1
2

Compare providers for flights from Keflavik Intl to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Keflavik Intl to Seattle in January.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Reykjavik Keflavik Intl Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Reykjavik Keflavik Intl Airport-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Reykjavik Keflavik Intl Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Reykjavik Keflavik Intl Airport-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Reykjavik Keflavik Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Keflavik Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Keflavik Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Keflavik Intl to Seattle

Get recent, data-driven insights about flights from Keflavik Intl to Seattle including ideal travel times, pricing trends, and more.

What is the cheapest time of day to fly from KEF to SEA?

Find hourly flight availability from Keflavik Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 16, 2025.

When flying from Reykjavik Keflavik Intl Airport to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 26% versus a flight at noon.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated January 16, 2025.
Finnair
7.6
Good
1,285 reviews

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.5

Crew

8.1

Boarding

7.7

Reviews

1 / 10

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

Finnair
7.6
Good
1,285 reviews
Finnair
7.6
Good
1,285 reviews

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.5

Crew

8.1

Boarding

7.7

Reviews

1 / 10

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

Austrian Airlines
7.6
Good
786 reviews
Finnair
7.6
Good
1,285 reviews

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.5

Crew

8.1

Boarding

7.7

Reviews

1 / 10

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

United Airlines
7.4
Good
8,964 reviews
Finnair
7.6
Good
1,285 reviews

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.5

Crew

8.1

Boarding

7.7

Reviews

1 / 10

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

Turkish Airlines
7.3
Good
3,921 reviews
Finnair
7.6
Good
1,285 reviews

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.5

Crew

8.1

Boarding

7.7

Reviews

1 / 10

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

Scandinavian Airlines
7.3
Good
1,308 reviews
Finnair
7.6
Good
1,285 reviews

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.5

Crew

8.1

Boarding

7.7

Reviews

1 / 10

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

Related info for your journey

Find useful and relevant information for your journey from Keflavik Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Reykjavik Keflavik Intl?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Reykjavik Keflavik Intl to Seattle. 1 airline have flights to Seattle/Tacoma Intl from Reykjavik Keflavik Intl on a regular basis. Booking flights from Reykjavik Keflavik Intl to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 1 inbound flight from Reykjavik Keflavik Intl per day.

  • What are the cheapest airlines flying from Reykjavik Keflavik Intl Airport to Seattle round-trip?

    Flying on Icelandair is currently your cheapest option to Seattle, with prices starting at $565. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Air Canada, with the lowest prices starting at $567 and $784, respectively. You may be able to fly from Reykjavik Keflavik Intl Airport to Seattle for 24% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Reykjavik Keflavik Intl Airport to Seattle one-way?

    For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $384. Users have also found prices from $567 and $633 on WestJet and American Airlines, respectively.

  • What are the most reliable airlines from Reykjavik Keflavik Intl Airport to Seattle?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Reykjavik Keflavik Intl Airport to Seattle on time: airBaltic (38%), Icelandair (28%), Alaska Airlines (18%).

  • What are the cheapest flights from Reykjavik Keflavik Intl Airport to Seattle?

    While on average a flight from Reykjavik Keflavik Intl Airport to Seattle is generally $1,038, our data shows the cheapest flight currently is $436. When looking at the most popular route, (Reykjavik Keflavik Intl - Seattle/Tacoma Intl), you can expect to pay $544 for that flight.

  • Can I find deals for flights from Keflavik Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Keflavik Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Keflavik Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Keflavik Intl to Seattle.

  • Can I find deals for business class flights from Keflavik Intl to Seattle?

    Yes. Cheapflights offers flight deals from Keflavik Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Reykjavik Keflavik Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Seattle (average of $238). Flying from Reykjavik Keflavik Intl Airport to Seattle in July is currently the most expensive (average of $411). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
SeaTac
Tukwila
Renton
Tacoma
Lacey
Federal Way
Ocean Shores
Leavenworth
Olympia
Marysville
Centralia
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Keflavik Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Keflavik Intl to Portland flights

Top airline flying from Keflavik Intl to Seattle

Discover the top airline that operate flights from Keflavik Intl to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$591Average$669FlexibilityNo cancel feeOn-time76%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.