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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 605

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
23 Jul — 30 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap 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 23 June 2026.

Mon 22/66:35 p.m.
SEA
-
KEF
Nonstop7h 25m
Alaska Airlines
Wed 1/712:45 p.m.
KEF
-
SEA
Nonstop7h 55m
Alaska Airlines
Deal found 19/6C$ 700
Fri 10/79:45 a.m.
SEA
-
KEF
1 stop14h 55m
Air France
Thu 16/79:30 a.m.
KEF
-
SEA
1 stop14h 30m
Air France
Deal found 22/6C$ 720
Tue 23/67:20 p.m.
SEA
-
KEF
2 stops29h 35m
Air Canada
Tue 30/69:15 a.m.
KEF
-
SEA
2 stops20h 27m
Air Canada
Deal found 22/6C$ 721
Thu 16/71:55 p.m.
SEA
-
KEF
1 stop11h 55m
United Airlines
Sun 26/711:30 a.m.
KEF
-
SEA
1 stop35h 25m
United Airlines
Deal found 23/6C$ 723
Fri 26/68:15 a.m.
SEA
-
KEF
1 stop17h 15m
United Airlines
Sun 28/610:00 a.m.
KEF
-
SEA
1 stop18h 07m
United Airlines
Deal found 22/6C$ 731
Mon 6/77:15 a.m.
SEA
-
KEF
1 stop19h 15m
Delta
Wed 15/78:45 a.m.
KEF
-
SEA
1 stop16h 57m
Delta
Deal found 23/6C$ 734
Wed 8/712:05 p.m.
SEA
-
KEF
1 stop11h 55m
Delta
Wed 15/79:30 a.m.
KEF
-
SEA
1 stop21h 28m
Delta
Deal found 19/6C$ 735
Sat 20/68:00 a.m.
SEA
-
KEF
1 stop17h 30m
United Airlines
Sat 27/610:00 a.m.
KEF
-
SEA
1 stop18h 07m
United Airlines
Deal found 20/6C$ 737
Sat 20/68:00 a.m.
SEA
-
KEF
1 stop17h 30m
United Airlines
Tue 30/610:00 a.m.
KEF
-
SEA
1 stop18h 07m
United Airlines
Deal found 19/6C$ 738
Tue 30/611:00 p.m.
SEA
-
KEF
2 stops25h 55m
United Airlines
Sat 18/711:00 a.m.
KEF
-
SEA
1 stop19h 48m
United Airlines
Deal found 23/6C$ 740
Wed 15/711:59 p.m.
SEA
-
KEF
2 stops24h 41m
Delta
Mon 27/711:25 a.m.
KEF
-
SEA
2 stops17h 35m
Delta
Deal found 20/6C$ 741

Find 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 23 June 2026.

Round-trip from

C$ 720

One-way from

C$ 605

Popular in

August

Cheapest in

January

Average price

C$ 843

Good round-trip deal

C$ 769 or less

Good one-way deal

C$ 157 or less
Air France
  • Air France
  • 10/7-16/7
  • 2 total stops
  • 29h 25m total
  • Seattle to Reykjavik
Search Deals
6/7
  • 6/7
  • 3 total stops
  • 28h 44m total
  • Seattle to Reykjavik
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
Search Deals

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 16/7

1:55 p.m.-8:50 a.m.

1 stop11h 55m

Reykjavik Keflavik Intl

Sun 26/7

11:30 a.m.-3:55 p.m.

1 stop35h 25m

C$ 723

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 23/7

11:20 a.m.-7:40 a.m.

1 stop13h 20m

Reykjavik Keflavik Intl

Fri 31/7

9:30 a.m.-8:48 p.m.

1 stop18h 18m

C$ 734

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 10/7

8:15 a.m.-8:30 a.m.

1 stop17h 15m

Reykjavik Keflavik Intl

Mon 20/7

11:00 a.m.-11:44 p.m.

1 stop19h 44m

C$ 734

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 10/7

5:30 a.m.-7:40 a.m.

2 stops19h 10m

Reykjavik Keflavik Intl

Thu 16/7

9:30 a.m.-8:48 p.m.

1 stop18h 18m

C$ 741

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 19/7

9:05 a.m.-7:00 a.m.

1 stop14h 55m

Reykjavik Keflavik Intl

Sat 25/7

9:30 a.m.-4:28 p.m.

2 stops13h 58m

C$ 741

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 6/7

9:45 p.m.-9:30 a.m.

2 stops28h 45m

Reykjavik Keflavik Intl

Fri 17/7

9:30 a.m.-6:33 p.m.

2 stops16h 03m

C$ 741

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 18/7

7:00 a.m.-8:30 a.m.

2 stops18h 30m

Reykjavik Keflavik Intl

Sat 25/7

11:30 a.m.-11:48 p.m.

2 stops19h 18m

C$ 741

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 29/7

11:20 a.m.-7:40 a.m.

1 stop13h 20m

Reykjavik Keflavik Intl

Mon 10/8

11:25 a.m.-8:20 p.m.

1 stop15h 55m

C$ 812

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 2/9

8:59 a.m.-7:00 a.m.

1 stop15h 01m

Reykjavik Keflavik Intl

Wed 9/9

11:25 a.m.-11:20 p.m.

1 stop18h 55m

C$ 874

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 8/9

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

2 stops17h 30m

Reykjavik Keflavik Intl

Thu 17/9

9:30 a.m.-8:21 p.m.

1 stop17h 51m

C$ 895

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/6

Showing 1-10 of 21 resultsSorted by cheapest first
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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?

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 62 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$ 704). Flying from Seattle to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of C$ 1,288). 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 23 June 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 6 outbound flights to Reykjavik Keflavik Intl per day.

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

    United Airlines, Delta, and Virgin Atlantic can get you from Seattle to Reykjavik Keflavik Intl Airport in just under 11h 55m. Your travel time can differ by up to 7h 15m. 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 cheapest flights from Seattle to Reykjavik Keflavik Intl Airport?

    On average you can expect to pay C$ 536 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 113 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 740.

  • 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$ 704). Flying from Seattle to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of C$ 1,288). 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
Keflavik
Hveragerdi
Grindavik

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Yes! Cheapflights helps users easily find flights from Seattle to Keflavik Intl with no change fees.

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