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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 482

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
5 Sep — 12 Sep1
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 6 August 2026.

Thu 10/97:00 p.m. -
Nonstop7h 25m
Sun 4/107:45 p.m. -
Nonstop7h 55m
Deal found 5/8C$ 827
Sun 1/112:35 p.m. -
Nonstop7h 40m
Wed 18/115:00 p.m. -
Nonstop8h 00m
Deal found 5/8C$ 830
Tue 25/87:00 p.m. -
Nonstop7h 25m
Sat 29/810:40 a.m. -
Nonstop8h 05m
Deal found 3/8C$ 845
Thu 24/911:59 p.m. -
1 stop24h 01m
Thu 1/109:30 a.m. -
1 stop18h 06m
Deal found 4/8C$ 848
Thu 1/106:00 a.m. -
1 stop18h 00m
Tue 6/1011:25 a.m. -
1 stop18h 39m
Deal found 3/8C$ 860
Tue 29/911:50 a.m. -
1 stop14h 40m
Thu 15/1011:25 a.m. -
1 stop15h 44m
Deal found 5/8C$ 862
Mon 19/106:00 a.m. -
2 stops20h 30m
Sat 24/1011:25 a.m. -
1 stop18h 39m
Deal found 4/8C$ 867
Thu 24/911:59 p.m. -
1 stop24h 01m
Mon 5/109:30 a.m. -
1 stop21h 25m
Deal found 4/8C$ 869
Mon 14/911:59 p.m. -
1 stop24h 01m
Thu 1/109:30 a.m. -
1 stop18h 06m
Deal found 5/8C$ 873

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 6 August 2026.

Round-trip from

C$ 827

One-way from

C$ 482

Popular in

August

Cheapest in

May

Average price

C$ 1,358

Good round-trip deal

C$ 803 or less

Good one-way deal

C$ 297 or less
Icelandair
  • Icelandair
  • 11/9-2/10
  • Nonstop
  • 15h 30m total
  • Seattle to Reykjavik
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WestJet
  • WestJet
  • 21/8
  • 2 total stops
  • 28h 20m total
  • Seattle to Reykjavik
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 238 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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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.
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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 6 August 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 Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Thu 24/9

11:59 p.m.-7:00 a.m.

1 stop24h 01m

Reykjavik Keflavik Intl

Thu 1/10

9:30 a.m.-8:36 p.m.

1 stop18h 06m

C$ 873

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Mon 24/8

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

1 stop17h 55m

Reykjavik Keflavik Intl

Sat 5/9

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

1 stop18h 55m

C$ 880
Quickest round-trip

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Fri 25/9

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

1 stop18h 00m

Reykjavik Keflavik Intl

Fri 9/10

11:25 a.m.-8:09 p.m.

1 stop15h 44m

C$ 930

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Mon 24/8

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

1 stop17h 55m

Reykjavik Keflavik Intl

Sat 29/8

9:30 a.m.-10:00 p.m.

1 stop19h 30m

C$ 950

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Sat 22/8

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

1 stop19h 10m

Reykjavik Keflavik Intl

Sat 29/8

9:30 a.m.-10:00 p.m.

1 stop19h 30m

C$ 1,019

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Wed 2/9

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

2 stops21h 00m

Reykjavik Keflavik Intl

Wed 9/9

9:30 a.m.-11:55 p.m.

1 stop21h 25m

C$ 1,029

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Fri 25/9

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

1 stop17h 45m

Reykjavik Keflavik Intl

Fri 9/10

9:15 a.m.-10:36 p.m.

2 stops44h 21m

C$ 1,050

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Wed 16/9

10:42 a.m.-8:50 a.m.

1 stop15h 08m

Reykjavik Keflavik Intl

Wed 23/9

9:15 a.m.-4:05 p.m.

2 stops37h 50m

C$ 1,064

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Wed 23/9

7:00 a.m.-8:50 a.m.

1 stop18h 50m

Reykjavik Keflavik Intl

Wed 30/9

9:15 a.m.-10:56 p.m.

2 stops44h 41m

C$ 1,064

SeattleReykjavik

SEA Seattle/Tacoma Intl - KEF Reykjavik Keflavik Intl

SEAKEF

Seattle/Tacoma Intl

Wed 2/9

1:57 p.m.-8:50 a.m.

1 stop11h 53m

Reykjavik Keflavik Intl

Wed 9/9

9:15 a.m.-2:28 p.m.

2 stops36h 13m

C$ 1,064

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

Showing 1-10 of 20 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 89 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, May is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 764). Flying from Seattle to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of C$ 1,358). 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 6 August 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?

Airfare is below average for this route at the moment.

Seattle to Reykjavik Keflavik Intl Airport flights typically cost between C$ 995 and C$ 1,910 in September.
The cheapest round-trip price found within the last 5 days was C$ 827 on Icelandair (10 Sep-4 Oct).

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?

    Delta can get you from Seattle to Reykjavik Keflavik Intl Airport in just under 24h 01m. 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$ 732 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 295 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 715.

  • 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, May is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 764). Flying from Seattle to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of C$ 1,358). 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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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.

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