Find flights
Deals
When to book
FAQs

Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 510

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 24/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
12 Jul — 19 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 12 June 2026.

Thu 11/66:35 p.m.
SEA
-
KEF
Nonstop7h 25m
Alaska Airlines
Fri 19/612:45 p.m.
KEF
-
SEA
Nonstop7h 55m
Alaska Airlines
Deal found 11/6C$ 690
Mon 8/611:25 p.m.
SEA
-
KEF
Nonstop7h 35m
Icelandair
Sun 14/610:40 a.m.
KEF
-
SEA
Nonstop8h 05m
Icelandair
Deal found 9/6C$ 693
Thu 2/711:20 p.m.
SEA
-
KEF
1 stop26h 10m
Multiple Airlines
Tue 7/79:15 a.m.
KEF
-
SEA
2 stops31h 52m
Multiple Airlines
Deal found 8/6C$ 700
Fri 19/68:00 a.m.
SEA
-
KEF
1 stop17h 30m
United Airlines
Mon 22/610:00 a.m.
KEF
-
SEA
2 stops37h 09m
United Airlines
Deal found 9/6C$ 703
Thu 11/61:00 p.m.
SEA
-
KEF
1 stop12h 30m
United Airlines
Thu 18/69:50 a.m.
KEF
-
SEA
2 stops39h 09m
United Airlines
Deal found 11/6C$ 704
Fri 12/611:20 p.m.
SEA
-
KEF
1 stop26h 10m
Multiple Airlines
Thu 18/69:50 a.m.
KEF
-
SEA
2 stops31h 17m
Multiple Airlines
Deal found 8/6C$ 707
Mon 8/67:05 a.m.
SEA
-
KEF
2 stops18h 45m
United Airlines
Sun 14/612:00 p.m.
KEF
-
SEA
1 stop17h 56m
United Airlines
Deal found 7/6C$ 708
Fri 12/610:52 a.m.
SEA
-
KEF
2 stops14h 38m
United Airlines
Mon 15/610:00 a.m.
KEF
-
SEA
2 stops40h 18m
United Airlines
Deal found 8/6C$ 710
Mon 22/67:54 p.m.
SEA
-
KEF
2 stops29h 56m
United Airlines
Wed 1/712:00 p.m.
KEF
-
SEA
2 stops27h 00m
United Airlines
Deal found 12/6C$ 711
Sat 13/65:15 p.m.
SEA
-
KEF
1 stop32h 35m
United Airlines
Fri 19/611:30 a.m.
KEF
-
SEA
1 stop16h 16m
United Airlines
Deal found 11/6C$ 712
Fri 26/68:15 a.m.
SEA
-
KEF
1 stop17h 15m
Multiple Airlines
Wed 8/79:50 a.m.
KEF
-
SEA
1 stop18h 17m
Multiple Airlines
Deal found 8/6C$ 714
Wed 24/63:00 p.m.
SEA
-
KEF
2 stops33h 55m
Air Canada
Wed 1/79:50 a.m.
KEF
-
SEA
2 stops39h 42m
Air Canada
Deal found 11/6C$ 719

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 12 June 2026.

Round-trip from

C$ 690

One-way from

C$ 510

Popular in

February

Cheapest in

January

Average price

C$ 825

Good round-trip deal

C$ 758 or less

Good one-way deal

C$ 382 or less
Alaska Airlines
  • Alaska Airlines
  • 22/6-1/7
  • Nonstop
  • 15h 20m total
  • Seattle to Reykjavik
Search Deals
WestJet
  • WestJet
  • 24/7
  • 1 total stop
  • 14h 10m total
  • Seattle to Reykjavik
Search Deals
High demand for flights, 5% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 26 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 12 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 25/6

11:20 p.m.-8:30 a.m.

1 stop26h 10m

Reykjavik Keflavik Intl

Wed 1/7

12:00 p.m.-7:06 p.m.

1 stop14h 06m

C$ 711

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 24/6

11:20 p.m.-8:30 a.m.

1 stop26h 10m

Reykjavik Keflavik Intl

Wed 1/7

12:00 p.m.-7:06 p.m.

1 stop14h 06m

C$ 711

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 26/6

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

1 stop17h 15m

Reykjavik Keflavik Intl

Wed 8/7

9:50 a.m.-9:07 p.m.

1 stop18h 17m

C$ 714
Quickest round-trip

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 4/7

1:00 p.m.-8:30 a.m.

1 stop12h 30m

Reykjavik Keflavik Intl

Wed 8/7

9:50 a.m.-9:07 p.m.

1 stop18h 17m

C$ 722

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 21/7

7:15 a.m.-9:30 a.m.

1 stop19h 15m

Reykjavik Keflavik Intl

Tue 28/7

11:25 a.m.-8:36 p.m.

1 stop16h 11m

C$ 725

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 19/7

6:05 a.m.-7:00 a.m.

1 stop17h 55m

Reykjavik Keflavik Intl

Sat 25/7

9:30 a.m.-5:00 p.m.

1 stop14h 30m

C$ 725

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 11/7

11:34 a.m.-9:30 a.m.

1 stop14h 56m

Reykjavik Keflavik Intl

Sat 18/7

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

1 stop18h 18m

C$ 725

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 10/7

9:45 p.m.-7:40 a.m.

2 stops26h 55m

Reykjavik Keflavik Intl

Fri 17/7

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

2 stops21h 29m

C$ 731

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 3/7

11:02 a.m.-8:50 a.m.

2 stops14h 48m

Reykjavik Keflavik Intl

Tue 7/7

11:00 a.m.-7:56 a.m.

2 stops27h 56m

C$ 731
Cheapest one-way

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 30/6

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

1 stop17h 15m

C$ 622

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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$ 672). Flying from Seattle to Reykjavik Keflavik Intl Airport in February is currently the most expensive (average of C$ 1,099). 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 12 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 can get you from Seattle to Reykjavik Keflavik Intl Airport in just under 26h 10m. Your travel time can differ by up to . Seattle and Reykjavik Keflavik Intl Airport are separated by a distance of 5807 km.

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

    On average you can expect to pay C$ 842 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 370 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 725.

  • 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$ 672). Flying from Seattle to Reykjavik Keflavik Intl Airport in February is currently the most expensive (average of C$ 1,099). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Keflavik Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Keflavik Intl from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Keflavik Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Keflavik Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Keflavik Intl with no change fees?

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

Can Cheapflights notify me if prices for flights from Seattle to Keflavik Intl become cheaper?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.