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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 596

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
14 Feb — 21 Feb1
1 adult
1 adult, Economy, 0 bags

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 15 January 2026.

Round-trip from

C$ 596

Popular in

June

Cheapest in

October

Average price

C$ 778

Good round-trip deal

C$ 634 or less
Icelandair
  • Icelandair
  • 31/3-13/4
  • Nonstop
  • 15h 30m total
  • Seattle to Reykjavik
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Highest demand for flights based on searches. 6% potential increase in price (C$ 85 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 19 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
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Find flight deals from Seattle to Keflavik Intl

Enter your travel dates to find the best prices.

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 15 January 2026.

Sun 1/22:35 p.m.
SEA
-
KEF
Nonstop7h 40m
Icelandair
Thu 5/25:00 p.m.
KEF
-
SEA
Nonstop8h 00m
Icelandair
Deal found 14/1C$ 596
Mon 13/411:59 a.m.
SEA
-
KEF
1 stop14h 31m
Delta
Fri 17/411:25 a.m.
KEF
-
SEA
1 stop17h 58m
Delta
Deal found 15/1C$ 631
Mon 13/46:00 a.m.
SEA
-
KEF
2 stops20h 30m
Virgin Atlantic
Fri 17/411:25 a.m.
KEF
-
SEA
1 stop17h 58m
Virgin Atlantic
Deal found 15/1C$ 636
Wed 8/410:58 p.m.
SEA
-
KEF
1 stop27h 32m
Delta
Wed 22/411:25 a.m.
KEF
-
SEA
1 stop15h 35m
Delta
Deal found 14/1C$ 642
Wed 8/410:58 p.m.
SEA
-
KEF
1 stop27h 32m
KLM
Thu 16/411:25 a.m.
KEF
-
SEA
1 stop15h 35m
KLM
Deal found 15/1C$ 645
Fri 1/511:59 a.m.
SEA
-
KEF
1 stop14h 31m
Delta
Thu 7/511:25 a.m.
KEF
-
SEA
1 stop15h 08m
Delta
Deal found 15/1C$ 650
Wed 8/410:58 p.m.
SEA
-
KEF
1 stop27h 32m
KLM
Wed 22/411:25 a.m.
KEF
-
SEA
2 stops19h 34m
KLM
Deal found 14/1C$ 652
Tue 19/511:15 a.m.
SEA
-
KEF
1 stop15h 15m
KLM
Sat 30/59:30 a.m.
KEF
-
SEA
2 stops14h 22m
KLM
Deal found 15/1C$ 657
Fri 24/410:40 p.m.
SEA
-
KEF
1 stop27h 50m
Delta
Sun 3/511:25 a.m.
KEF
-
SEA
1 stop17h 58m
Delta
Deal found 15/1C$ 663
Mon 6/47:20 a.m.
SEA
-
KEF
1 stop19h 10m
Delta
Wed 15/411:25 a.m.
KEF
-
SEA
1 stop15h 35m
Delta
Deal found 13/1C$ 681
Mon 6/47:20 a.m.
SEA
-
KEF
1 stop19h 10m
KLM
Wed 15/411:25 a.m.
KEF
-
SEA
2 stops19h 34m
KLM
Deal found 13/1C$ 687
Sun 5/410:58 p.m.
SEA
-
KEF
1 stop27h 32m
KLM
Wed 15/411:25 a.m.
KEF
-
SEA
2 stops19h 34m
KLM
Deal found 13/1C$ 695

Cheapflights Fare Finder

 
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 15 January 2026.
Use the filters below to find and compare flights from Seattle to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Seattle

Fly to

Keflavik Intl

Route

Depart

Return

Price

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 1/2

2:35 p.m.-6:15 a.m.

Nonstop7h 40m

Reykjavik Keflavik Intl

Thu 5/2

5:00 p.m.-5:00 p.m.

Nonstop8h 00m

C$ 596

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 25/2

2:35 p.m.-6:15 a.m.

Nonstop7h 40m

Reykjavik Keflavik Intl

Fri 6/3

5:00 p.m.-5:00 p.m.

Nonstop8h 00m

C$ 596

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 8/4

10:58 p.m.-9:30 a.m.

1 stop27h 32m

Reykjavik Keflavik Intl

Wed 22/4

11:25 a.m.-8:00 p.m.

1 stop15h 35m

C$ 642

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 26/5

7:20 a.m.-9:30 a.m.

1 stop19h 10m

Reykjavik Keflavik Intl

Sun 31/5

8:50 a.m.-8:29 p.m.

1 stop18h 39m

C$ 650

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 21/5

9:40 a.m.-6:20 a.m.

1 stop13h 40m

Reykjavik Keflavik Intl

Fri 29/5

9:30 a.m.-11:26 p.m.

1 stop20h 56m

C$ 650

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 1/5

11:59 a.m.-9:30 a.m.

1 stop14h 31m

Reykjavik Keflavik Intl

Thu 7/5

11:25 a.m.-7:33 p.m.

1 stop15h 08m

C$ 650

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 19/5

7:20 a.m.-9:30 a.m.

1 stop19h 10m

Reykjavik Keflavik Intl

Sat 30/5

11:25 a.m.-7:33 p.m.

1 stop15h 08m

C$ 650

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 8/4

10:58 p.m.-9:30 a.m.

1 stop27h 32m

Reykjavik Keflavik Intl

Wed 22/4

11:25 a.m.-11:59 p.m.

2 stops19h 34m

C$ 652

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 24/4

10:40 p.m.-9:30 a.m.

1 stop27h 50m

Reykjavik Keflavik Intl

Sun 3/5

11:25 a.m.-10:23 p.m.

1 stop17h 58m

C$ 663

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 2/5

10:40 p.m.-9:30 a.m.

1 stop27h 50m

C$ 603

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/1

Showing 1-10 of 14 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.

Cheapflights Insights

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

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 9 January 2026.

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 67 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, October is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 489). Flying from Seattle to Reykjavik Keflavik Intl Airport in May is currently the most expensive (average of C$ 714). 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 15 January 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Reykjavik Keflavik Intl Airport as you normally would.

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

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.

  • How long is the flight from Seattle to Reykjavik Keflavik Intl Airport?

    Icelandair, Delta, and KLM can get you from Seattle to Reykjavik Keflavik Intl Airport in just under 7h 40m. Your travel time can differ by up to 19h 52m. Seattle and Reykjavik Keflavik Intl Airport are separated by a distance of 5807 km. This flight may include one or multiple stops.

  • 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 (90%), Icelandair (90%) and airBaltic (82%).

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

    On average you can expect to pay C$ 700 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 598 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 656.

  • 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, October is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 489). Flying from Seattle to Reykjavik Keflavik Intl Airport in May is currently the most expensive (average of C$ 714). 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

Travelling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Kopavogur
Keflavik
Hveragerdi
Grindavik

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