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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 582

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
7 Feb — 14 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 8 January 2026.

Round-trip from

C$ 677

One-way from

C$ 582

Popular in

June

Cheapest in

October

Average price

C$ 757

Good round-trip deal

C$ 653 or less
Delta
  • Delta
  • 12/4-21/4
  • 2 total stops
  • 30h 43m total
  • Seattle to Reykjavik
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Delta
  • Delta
  • 5/5
  • 1 total stop
  • 14h 31m total
  • Seattle to Reykjavik
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Highest demand for flights based on searches. 7% potential increase in price (C$ 91 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 18 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 8 January 2026.

Sun 12/41:45 p.m.SEA - KEF
1 stop12h 45mDelta
Tue 21/411:25 a.m.KEF - SEA
1 stop17h 58mDelta
Deal found 8/1C$ 677
Sat 11/410:58 p.m.SEA - KEF
1 stop27h 32mDelta
Tue 21/411:25 a.m.KEF - SEA
1 stop17h 58mDelta
Deal found 8/1C$ 684
Sun 1/22:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 5/25:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 7/1C$ 690
Thu 9/41:45 p.m.SEA - KEF
1 stop12h 45mDelta
Tue 21/411:25 a.m.KEF - SEA
1 stop15h 35mDelta
Deal found 8/1C$ 701
Mon 13/46:00 a.m.SEA - KEF
2 stops20h 30mVirgin Atlantic
Mon 20/411:25 a.m.KEF - SEA
1 stop17h 58mVirgin Atlantic
Deal found 7/1C$ 706
Sat 11/410:58 p.m.SEA - KEF
1 stop27h 32mDelta
Mon 20/411:25 a.m.KEF - SEA
1 stop17h 58mDelta
Deal found 8/1C$ 708
Fri 17/410:40 p.m.SEA - KEF
1 stop27h 50mKLM
Mon 27/411:25 a.m.KEF - SEA
1 stop15h 35mKLM
Deal found 8/1C$ 712
Wed 8/410:58 p.m.SEA - KEF
1 stop27h 32mDelta
Fri 17/411:25 a.m.KEF - SEA
1 stop17h 58mDelta
Deal found 8/1C$ 713
Sat 11/41:45 p.m.SEA - KEF
1 stop12h 45mDelta
Sat 18/411:25 a.m.KEF - SEA
1 stop17h 58mDelta
Deal found 8/1C$ 724

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 8 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$ 690

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 18/4

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

1 stop14h 31m

Reykjavik Keflavik Intl

Tue 28/4

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

1 stop15h 35m

C$ 701

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 13/4

6:00 a.m.-9:30 a.m.

2 stops20h 30m

Reykjavik Keflavik Intl

Fri 17/4

11:25 a.m.-8:34 a.m.

2 stops28h 09m

C$ 730

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 24/4

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

1 stop14h 31m

Reykjavik Keflavik Intl

Sat 2/5

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

1 stop15h 35m

C$ 789

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 23/3

3:35 p.m.-6:15 a.m.

Nonstop7h 40m

Reykjavik Keflavik Intl

Wed 1/4

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

Nonstop7h 55m

C$ 863

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 11/5

11:15 a.m.-9:30 a.m.

1 stop15h 15m

Reykjavik Keflavik Intl

Mon 18/5

8:50 a.m.-11:26 p.m.

2 stops21h 36m

C$ 886

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 9/5

9:55 p.m.-9:30 a.m.

1 stop28h 35m

Reykjavik Keflavik Intl

Sun 24/5

9:30 a.m.-4:13 p.m.

1 stop13h 43m

C$ 887

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 8/5

11:15 a.m.-9:30 a.m.

1 stop15h 15m

Reykjavik Keflavik Intl

Sat 16/5

9:30 a.m.-8:24 p.m.

1 stop17h 54m

C$ 948

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 2/5

1:29 p.m.-4:30 p.m.

2 stops20h 01m

Reykjavik Keflavik Intl

Sun 24/5

8:35 a.m.-4:00 p.m.

1 stop14h 25m

C$ 1,020

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 29/5

6:30 p.m.-9:00 a.m.

Nonstop7h 30m

Reykjavik Keflavik Intl

Sun 7/6

12:45 p.m.-1:40 p.m.

Nonstop7h 55m

C$ 1,028

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 24 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 2 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$ 487). Flying from Seattle to Reykjavik Keflavik Intl Airport in May is currently the most expensive (average of C$ 710). 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 8 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 and Delta can get you from Seattle to Reykjavik Keflavik Intl Airport in just under 7h 40m. Your travel time can differ by up to 6h 51m. 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$ 706 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 594 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 652.

  • 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$ 487). Flying from Seattle to Reykjavik Keflavik Intl Airport in May is currently the most expensive (average of C$ 710). 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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Not ready to book yet? You can track prices for flights from Seattle to Keflavik Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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