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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 480

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
15 Mar — 22 Mar1
1 adult

Cheap flight deals from Seattle to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Keflavik Intl (KEF). 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 10 March 2025.

Round-trip from

C$ 767

One-way from

C$ 480

Popular in

December

Cheapest in

May

Average price

C$ 1,136

Good round-trip deal

C$ 813 or less

Good one-way deal

C$ 414 or less
Icelandair
  • Icelandair
  • 21/4-28/4
  • Nonstop
  • 15h 20m total
  • Seattle to Reykjavik
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27/4
  • 27/4
  • 1 total stop
  • 22h 15m total
  • Seattle to Reykjavik
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Highest demand for flights based on searches. 1% potential increase in price (C$ 20 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
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Find flight deals from Seattle to Keflavik Intl

Cheapest flights from Seattle to Keflavik Intl
Explore the most affordable flight options available from Seattle to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 March 2025.

Mon 21/47:00 p.m.SEA - KEF
Nonstop7h 25mIcelandair
Mon 28/47:45 p.m.KEF - SEA
Nonstop7h 55mIcelandair
Deal found 9/3C$ 767
Mon 21/49:55 a.m.SEA - KEF
2 stops16h 35mAir France
Mon 28/411:25 a.m.KEF - SEA
1 stop18h 19mAir France
Deal found 9/3C$ 787
Fri 18/47:23 a.m.SEA - KEF
1 stop19h 07mMultiple Airlines
Fri 25/411:25 a.m.KEF - SEA
1 stop18h 19mMultiple Airlines
Deal found 9/3C$ 789
Wed 2/42:18 p.m.SEA - KEF
2 stops26h 52mLufthansa
Mon 7/412:25 a.m.KEF - SEA
1 stop19h 00mLufthansa
Deal found 9/3C$ 802
Tue 22/411:24 a.m.SEA - KEF
1 stop15h 06mDelta
Tue 29/411:25 a.m.KEF - SEA
1 stop15h 38mDelta
Deal found 9/3C$ 803
Thu 11/95:45 p.m.SEA - KEF
2 stops32h 45mKLM
Wed 24/98:50 a.m.KEF - SEA
2 stops22h 08mKLM
Deal found 9/3C$ 839
Tue 8/712:30 a.m.SEA - KEF
2 stops25h 05mUnited Airlines
Sun 13/710:00 a.m.KEF - SEA
2 stops43h 29mUnited Airlines
Deal found 9/3C$ 938
Thu 8/55:40 p.m.SEA - KEF
1 stop15h 50mFinnair
Thu 22/58:45 a.m.KEF - SEA
1 stop14h 15mFinnair
Deal found 10/3C$ 952
Thu 20/116:50 p.m.SEA - KEF
1 stop14h 45mBritish Airways
Tue 25/1111:45 a.m.KEF - SEA
1 stop37h 10mBritish Airways
Deal found 10/3C$ 1,014

Find flights from Seattle to Keflavik Intl within your budget

Customize your flight search to find flights from Seattle 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 629,999 searches. Data last updated 10 March 2025.

Fly from

Seattle

Fly to

Keflavik Intl

Route

Depart

Return

Price

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 21/4

7:00 p.m.-9:25 a.m.

Nonstop7h 25m

Reykjavik Keflavik Intl

Tue 29/4

7:45 p.m.-8:40 p.m.

Nonstop7h 55m

C$ 767

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 21/4

7:23 a.m.-9:30 a.m.

1 stop19h 07m

Reykjavik Keflavik Intl

Mon 28/4

11:25 a.m.-10:44 p.m.

1 stop18h 19m

C$ 787

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 18/4

7:23 a.m.-9:30 a.m.

1 stop19h 07m

Reykjavik Keflavik Intl

Fri 25/4

11:25 a.m.-10:44 p.m.

1 stop18h 19m

C$ 789

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 2/4

2:18 p.m.-12:10 a.m.

2 stops26h 52m

Reykjavik Keflavik Intl

Mon 7/4

12:25 a.m.-12:25 p.m.

1 stop19h 00m

C$ 802

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 22/4

11:24 a.m.-9:30 a.m.

1 stop15h 06m

Reykjavik Keflavik Intl

Tue 29/4

11:25 a.m.-8:03 p.m.

1 stop15h 38m

C$ 803

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 8/7

12:30 a.m.-8:35 a.m.

2 stops25h 05m

Reykjavik Keflavik Intl

Sun 13/7

10:00 a.m.-10:29 p.m.

2 stops43h 29m

C$ 938

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 8/5

5:40 p.m.-4:30 p.m.

1 stop15h 50m

Reykjavik Keflavik Intl

Thu 22/5

8:45 a.m.-4:00 p.m.

1 stop14h 15m

C$ 952

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 5/5

8:20 p.m.-10:00 a.m.

1 stop30h 40m

Reykjavik Keflavik Intl

Sun 18/5

10:20 a.m.-11:35 a.m.

1 stop32h 15m

C$ 1,027

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 27/4

11:30 p.m.-4:45 a.m.

1 stop22h 15m

C$ 480

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 16/8

3:39 p.m.-8:15 a.m.

2 stops33h 36m

C$ 606

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 16 results
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Best time to book a flight from Seattle to Keflavik Intl

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

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

How far ahead should I book a flight from Seattle to Reykjavik Keflavik Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Keflavik Intl. Price data was last updated on 7 March 2025.

The price you pay for your flight from Seattle to Reykjavik Keflavik Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 56 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 268). Flying from Seattle to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of C$ 593). 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 SEA to KEF?

Find hourly flight availability from Seattle 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 10 March 2025.

It’s typically best to fly out from Seattle to Reykjavik Keflavik Intl Airport in the morning. Doing so could potentially save you 17% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Keflavik Intl by month

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

In terms of precipitation, rainfall in Reykjavik Keflavik Intl Airport ranges from 40.0 - 80.0 mm per month. January is typically the wettest month, when rainfall can reach 80.0 mm. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 40.0 mm.

Temperature in Keflavik Intl by month

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

If weather is an important factor for your trip to Reykjavik Keflavik Intl Airport, 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 11.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 10 March 2025.
Alaska Airlines
8.0
Very good
9,731 reviews
Check prices

Crew

8.5

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Reviews

1 / 20

8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Alaska Airlines
8.0
Very good
9,731 reviews
Alaska Airlines
8.0
Very good
9,731 reviews
Check prices

Crew

8.5

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Reviews

1 / 20

8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Delta
8.0
Very good
7,973 reviews
Alaska Airlines
8.0
Very good
9,731 reviews
Check prices

Crew

8.5

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Reviews

1 / 20

8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Finnair
7.6
Good
1,270 reviews
Alaska Airlines
8.0
Very good
9,731 reviews
Check prices

Crew

8.5

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Reviews

1 / 20

8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

SWISS
7.5
Good
1,567 reviews
Alaska Airlines
8.0
Very good
9,731 reviews
Check prices

Crew

8.5

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Reviews

1 / 20

8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Air France
7.4
Good
1,427 reviews
Alaska Airlines
8.0
Very good
9,731 reviews
Check prices

Crew

8.5

Boarding

8.2

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.9

Reviews

1 / 20

8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

Find useful and relevant information for your journey from Seattle 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 airport do you fly from for flights from Seattle to Reykjavik Keflavik Intl?

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Reykjavik Keflavik Intl. 0 airlines have flights from Seattle/Tacoma Intl to Reykjavik Keflavik Intl on a regular basis. Booking flights from Seattle/Tacoma Intl to Reykjavik Keflavik Intl should not be difficult; the airport handles an average of 1 outbound flight to Reykjavik Keflavik Intl per day.

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

    According to our current data, Icelandair (C$ 767), Air France (C$ 787), and Lufthansa (C$ 802) offers the cheapest pricing from Seattle to Reykjavik Keflavik Intl Airport. You may be able to fly from Seattle to Reykjavik Keflavik Intl Airport for 30% less than the average price by searching for these airlines.

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

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at C$ 606. United Airlines flights start at C$ 725 while deals on Icelandair start at C$ 751 one-way.

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

    The top 3 most reliable airlines when flying from Seattle to Reykjavik Keflavik Intl Airport are Alaska Airlines (92%), Icelandair (92%) and airBaltic (81%).

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

    On average you can expect to pay C$ 1,541 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 401 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 899.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Reykjavik Keflavik Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 268). Flying from Seattle to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of C$ 593). 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

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Keflavik
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