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Keflavik Intl

$227+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$438
(Cheapflightsfares)

One-way from

$227
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$695

Good round-trip deal

$435 or less

Good one-way deal

$199 or less
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. 6% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/313:35 pmSEA - KEF
Nonstop7h 40mIcelandair
Sat 11/85:05 pmKEF - SEA
Nonstop7h 55mIcelandair
Deal found 7/31$438
This Booking.com deal was found by Cheapflights users on 7/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1310:00 amSEA - KEF
2 stops15h 10mAir Canada
Sat 9/209:50 amKEF - SEA
2 stops15h 46mAir Canada
Deal found 7/30$440
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:15 amPDX - KEF
2 stops18h 55mAir Canada
Wed 9/179:30 amKEF - PDX
2 stops40h 01mAir Canada
Deal found 7/29$459
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2211:59 pmPDX - KEF
2 stops25h 11mUnited Airlines
Wed 9/179:30 amKEF - PDX
2 stops36h 55mUnited Airlines
Deal found 7/30$463
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/227:20 amSEA - KEF
1 stop18h 00mUnited Airlines
Mon 8/259:50 amKEF - SEA
2 stops37h 02mUnited Airlines
Deal found 7/30$465
This KLM deal was found by Cheapflights users on 7/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2911:25 amSEA - KEF
1 stop15h 05mMultiple Airlines
Mon 10/2011:25 amKEF - SEA
1 stop15h 37mMultiple Airlines
Deal found 7/30$473
This KLM deal was found by Cheapflights users on 7/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:15 amPDX - KEF
1 stop19h 15mKLM
Tue 10/711:25 amKEF - PDX
1 stop16h 59mKLM
Deal found 7/30$473
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/167:15 amPDX - KEF
1 stop19h 15mDelta
Wed 9/248:45 amKEF - PDX
1 stop32h 34mDelta
Deal found 7/29$494
This KLM deal was found by Cheapflights users on 7/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2311:30 amPDX - KEF
1 stop11h 50mMultiple Airlines
Tue 9/3011:25 amKEF - PDX
1 stop16h 40mMultiple Airlines
Deal found 7/30$514
This Lufthansa deal was found by Cheapflights users on 7/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/33:10 pmSEA - KEF
1 stop15h 05mLufthansa
Sun 12/74:45 pmKEF - SEA
1 stop27h 25mLufthansa
Deal found 7/30$532
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/93:20 pmPDX - KEF
Nonstop7h 35mIcelandair
Tue 10/144:50 pmKEF - PDX
Nonstop8h 05mIcelandair
Deal found 7/30$579
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/275:15 amGEG - KEF
2 stops19h 55mUnited Airlines
Wed 9/39:30 amKEF - GEG
2 stops32h 57mUnited Airlines
Deal found 7/30$658

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 July 31, 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

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 10/1

7:00 pm-9:25 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Wed 10/8

7:45 pm-8:40 pm

Nonstop7h 55m

$437

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 9/13

10:00 am-8:10 am

2 stops15h 10m

Reykjavik Keflavik Intl

Sat 9/20

9:50 am-6:36 pm

2 stops15h 46m

$440

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 8/22

7:20 am-8:20 am

1 stop18h 00m

Reykjavik Keflavik Intl

Fri 8/29

9:30 am-5:58 pm

2 stops39h 28m

$459

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Thu 9/11

6:15 am-8:10 am

2 stops18h 55m

Reykjavik Keflavik Intl

Wed 9/17

9:30 am-6:31 pm

2 stops40h 01m

$459

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Fri 8/22

11:59 pm-8:10 am

2 stops25h 11m

Reykjavik Keflavik Intl

Wed 9/17

9:30 am-3:25 pm

2 stops36h 55m

$463

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Tue 9/23

7:15 am-9:30 am

1 stop19h 15m

Reykjavik Keflavik Intl

Tue 10/7

11:25 am-9:24 pm

1 stop16h 59m

$473

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Sat 8/23

11:45 am-7:00 am

1 stop12h 15m

Reykjavik Keflavik Intl

Thu 9/18

11:25 am-9:05 pm

1 stop16h 40m

$486

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 9/8

9:25 am-6:20 am

2 stops13h 55m

Reykjavik Keflavik Intl

Mon 9/15

8:45 am-5:54 pm

1 stop16h 09m

$491

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 9/5

11:15 pm-6:20 am

1 stop24h 05m

Reykjavik Keflavik Intl

Fri 9/19

8:45 am-5:54 pm

1 stop16h 09m

$494

PortlandReykjavik

PDX - KEF

PDXKEF

Portland

Tue 9/23

11:30 am-6:20 am

1 stop11h 50m

Reykjavik Keflavik Intl

Tue 9/30

11:25 am-9:05 pm

1 stop16h 40m

$514

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 28 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, November is the cheapest month in which you can book a flight from State of Washington to Reykjavik Keflavik Intl Airport (average of $328). Flying from State of Washington to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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 July 31, 2025.

When flying from State of Washington to Reykjavik Keflavik Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from State of Washington to Reykjavik Keflavik Intl Airport

Explore weekly flight availability from Washington to Keflavik Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 31, 2025.

The most flights from USWA to KEF are scheduled on a Monday (6 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 on average).

How much does it cost to fly round-trip from State of Washington to Reykjavik Keflavik Intl Airport?

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. 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 Keflavik Intl. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and KLM from Washington to Reykjavik Keflavik Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
KLM
7.8
Good
1,383 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
WestJet
7.2
Good
2,978 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

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

    $272 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Icelandair, with prices starting from $426 and $430, 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 $1,581 for a flight from State of Washington to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $167 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at $431.

  • 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, November is the cheapest month in which you can book a flight from State of Washington to Reykjavik Keflavik Intl Airport (average of $328). Flying from State of Washington to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$323Average$543FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$397Average$852FlexibilityNo cancel feeOn-time76%

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