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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 553

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
22 Nov — 29 Nov1
1 adult
1 adult, Economy, 0 bags

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 23 October 2025.

Mon 3/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Wed 12/115:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 21/10C$ 629
Mon 1/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Tue 9/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 839
Tue 2/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Tue 9/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 853
Fri 5/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Wed 10/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 895
Thu 4/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Sat 13/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 983
Sun 9/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Fri 14/115:15 p.m.KEF - SEA
1 stop11h 22mIcelandair
Deal found 22/10C$ 1,021
Mon 1/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 11/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 1,035
Wed 26/116:50 p.m.SEA - KEF
2 stops30h 25mFinnair
Wed 3/1210:00 a.m.KEF - SEA
2 stops38h 55mFinnair
Deal found 23/10C$ 1,070
Mon 1/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Fri 12/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 1,084
Fri 5/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 11/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 20/10C$ 1,091
Tue 4/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Sat 8/115:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 21/10C$ 1,098

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 23 October 2025.

Round-trip from

C$ 629

One-way from

C$ 553

Popular in

December

Cheapest in

October

Average price

C$ 626

Good round-trip deal

C$ 587 or less

Good one-way deal

C$ 1,287 or less
Icelandair
  • Icelandair
  • 20/1-29/1
  • Nonstop
  • 15h 40m total
  • Seattle to Reykjavik
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12/12
  • 12/12
  • 3 total stops
  • 59h 30m total
  • Seattle to Reykjavik
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 192 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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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 23 October 2025.
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

Tue 20/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 27/1

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

Nonstop8h 00m

C$ 629

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 31/1

8:40 a.m.-2:20 p.m.

2 stops21h 40m

Reykjavik Keflavik Intl

Sun 8/2

3:20 p.m.-8:57 p.m.

2 stops37h 37m

C$ 816

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 14/1

3:10 p.m.-2:15 p.m.

1 stop15h 05m

Reykjavik Keflavik Intl

Sun 18/1

3:20 p.m.-12:10 p.m.

1 stop28h 50m

C$ 816

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 20/4

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

1 stop28h 35m

Reykjavik Keflavik Intl

Tue 28/4

11:25 a.m.-10:16 p.m.

1 stop17h 51m

C$ 833

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 1/12

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 9/12

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

Nonstop8h 00m

C$ 839

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 3/12

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 9/12

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

Nonstop8h 00m

C$ 853

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 25/2

5:00 a.m.-2:15 p.m.

3 stops25h 15m

Reykjavik Keflavik Intl

Tue 3/3

3:20 p.m.-6:03 p.m.

3 stops34h 43m

C$ 876

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 5/12

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 9/12

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

Nonstop8h 00m

C$ 895

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 25/1

6:50 p.m.-9:15 a.m.

2 stops30h 25m

Reykjavik Keflavik Intl

Tue 3/2

10:00 a.m.-4:55 p.m.

2 stops38h 55m

C$ 928

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 12/1

6:50 p.m.-9:00 a.m.

2 stops30h 10m

Reykjavik Keflavik Intl

Wed 21/1

10:00 a.m.-4:55 p.m.

2 stops38h 55m

C$ 930

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/10

Showing 1-10 of 21 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 17 October 2025.

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 47 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$ 493). Flying from Seattle to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of C$ 906). 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 October 2025.

It’s typically best to fly out from Seattle to Reykjavik Keflavik Intl Airport in the morning. Doing so could potentially save you 17% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 20h 55m. 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$ 1,045 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 525 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 661.

  • 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$ 493). Flying from Seattle to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of C$ 906). 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
Grindavik
Kopavogur
Keflavik
Hveragerdi

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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.

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