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Keflavik Intl

$307+ Cheap flights from Washington to Keflavik Intl (KEF)

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Washington to Keflavik Intl

Keep the following information in mind while searching for Washington to Keflavik Intl flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$411
(CrystalTravel)

One-way from

$307
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$498

Good round-trip deal

$473 or less

Good one-way deal

$423 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Reykjavik (REK) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Reykjavik (REK) flights.
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From Washington to Reykjavik Keflavik Intl
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One-way flight from Washington to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 4% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Washington to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Washington to Reykjavik Keflavik Intl.
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Find flight deals from Washington to Keflavik Intl

Cheapest flights from Washington to Keflavik Intl
Explore the most affordable flight options available from Washington to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Wed 11/195:00 pmKEF - SEA
Nonstop8h 00mIcelandair
Deal found 10/29$412
This Mytrip deal was found by Cheapflights users on 10/30. 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 12/82:45 pmPDX - KEF
Nonstop7h 30mIcelandair
Mon 12/154:50 pmKEF - PDX
Nonstop8h 10mIcelandair
Deal found 10/30$412
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/102:45 pmPDX - KEF
Nonstop7h 30mIcelandair
Mon 11/174:50 pmKEF - PDX
Nonstop8h 10mIcelandair
Deal found 10/29$415
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/102:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Mon 12/155:00 pmKEF - SEA
Nonstop8h 00mIcelandair
Deal found 10/29$450
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Mon 11/245:00 pmKEF - SEA
Nonstop8h 00mIcelandair
Deal found 10/29$559
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:10 pmSEA - KEF
1 stop15h 05mLufthansa
Fri 2/133:25 pmKEF - SEA
1 stop28h 45mLufthansa
Deal found 10/28$563
This Flightnetwork deal was found by Cheapflights users on 10/30. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Mon 12/155:00 pmKEF - SEA
Nonstop8h 00mIcelandair
Deal found 10/30$576
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/77:55 amSEA - KEF
1 stop14h 10mMultiple Airlines
Thu 12/114:55 pmKEF - SEA
1 stop13h 35mMultiple Airlines
Deal found 10/30$586
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Sun 12/72:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Mon 12/155:00 pmKEF - SEA
Nonstop8h 00mIcelandair
Deal found 10/30$588
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/247:00 amPDX - KEF
2 stops23h 20mLufthansa
Tue 12/23:20 pmKEF - PDX
2 stops35h 21mLufthansa
Deal found 10/30$689
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2310:52 amPDX - KEF
2 stops43h 28mLufthansa
Tue 12/23:20 pmKEF - PDX
2 stops35h 21mLufthansa
Deal found 10/30$696
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/89:00 amGEG - KEF
1 stop13h 15mMultiple Airlines
Mon 12/155:00 pmKEF - GEG
1 stop15h 24mMultiple Airlines
Deal found 10/30$725

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Keflavik Intl 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 October 30, 2025.
Use the filters below to find and compare flights from Washington to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Washington

Fly to

Keflavik Intl

Route

Depart

Return

Price

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Mon 12/8

2:45 pm-6:15 am

Nonstop7h 30m

Reykjavik Keflavik Intl

Mon 12/15

4:50 pm-5:00 pm

Nonstop8h 10m

$426

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 1/15

2:00 pm-2:20 pm

1 stop16h 20m

Reykjavik Keflavik Intl

Tue 1/20

3:20 pm-1:20 pm

2 stops30h 00m

$536

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 1/1

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Sat 2/14

5:00 pm-5:00 pm

Nonstop8h 00m

$599

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 1/4

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Sat 2/14

5:00 pm-5:00 pm

Nonstop8h 00m

$599

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 12/31

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Sat 2/14

5:00 pm-5:00 pm

Nonstop8h 00m

$599

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 4/14

8:20 pm-7:50 am

2 stops28h 30m

Reykjavik Keflavik Intl

Thu 4/30

8:35 am-11:05 pm

2 stops21h 30m

$614

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 11/20

2:35 pm-6:15 am

Nonstop7h 40m

Reykjavik Keflavik Intl

Thu 11/27

5:00 pm-5:00 pm

Nonstop8h 00m

$641

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Sat 12/6

7:04 am-6:05 am

1 stop15h 01m

Reykjavik Keflavik Intl

Thu 12/11

9:55 am-8:10 pm

1 stop18h 15m

$661

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

$663

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 44 results
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Best time to book a flight from Washington to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Washington 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.

Cheapflights Insights

Everything you need to know about your flight from Washington to Reykjavik Keflavik Intl Airport

What is the cheapest month to book a flight from State of Washington to Reykjavik Keflavik Intl Airport?

Currently, August is the cheapest month in which you can book a flight from State of Washington to Reykjavik Keflavik Intl Airport (average of $152). Flying from State of Washington to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of $567). 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.

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

Find hourly flight availability from Washington to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from State of Washington to Reykjavik Keflavik Intl Airport at noon. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from State of Washington to Reykjavik Keflavik Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Washington to Keflavik Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Reykjavik Keflavik Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

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

  • How long is the flight from State of Washington to Reykjavik Keflavik Intl Airport?

    Departing from State of Washington to Reykjavik Keflavik Intl Airport will take you 7h 30m. State of Washington and Reykjavik Keflavik Intl Airport are separated by a distance of 3724 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $401 is the cheapest one-way deal found within the past few days, from SWISS. You may also be able to find cheap deals on Lufthansa and Icelandair, with prices starting from $414 and $422, respectively.

  • What are the most popular routes from State of Washington to Reykjavik Keflavik Intl Airport?

    While some choose either Portland - Reykjavik Keflavik Intl or Spokane - Reykjavik Keflavik Intl, Seattle/Tacoma Intl - Reykjavik Keflavik Intl is the most popular route from State of Washington to Reykjavik Keflavik Intl Airport.

  • What are the cheapest flights from State of Washington to Reykjavik Keflavik Intl Airport?

    On average you can expect to pay $1,269 for a flight from State of Washington to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $364 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at $433.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Keflavik Intl 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 State of Washington to Reykjavik Keflavik Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from State of Washington to Reykjavik Keflavik Intl Airport (average of $152). Flying from State of Washington to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of $567). 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
Keflavik
Hveragerdi

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Top 2 airlines flying from Washington to Keflavik Intl

Discover the top 2 airlines that operate flights from Washington to Keflavik Intl. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$323Average$573FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$396Average$860FlexibilityNo cancel feeOn-time76%

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