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Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 703

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
6 Dec — 13 Dec1
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 6 November 2025.

Tue 11/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 20/115:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 5/11C$ 766
Wed 3/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Wed 10/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 6/11C$ 893
Sun 7/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 11/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 6/11C$ 985
Thu 4/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Tue 9/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 6/11C$ 1,083
Thu 4/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 11/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 5/11C$ 1,105
Fri 5/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Tue 9/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 6/11C$ 1,126
Sun 7/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Sat 13/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 6/11C$ 1,140
Tue 11/1111:35 a.m.SEA - KEF
1 stop10h 40mIcelandair
Wed 19/115:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 5/11C$ 1,154
Wed 3/122:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 11/125:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 6/11C$ 1,175
Tue 11/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Tue 18/115:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 5/11C$ 1,203
Tue 11/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Fri 21/115:15 p.m.KEF - SEA
1 stop11h 23mIcelandair
Deal found 5/11C$ 1,210
Sat 15/112:35 p.m.SEA - KEF
Nonstop7h 40mIcelandair
Thu 20/115:00 p.m.KEF - SEA
Nonstop8h 00mIcelandair
Deal found 5/11C$ 1,222

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 6 November 2025.

Round-trip from

C$ 703

Popular in

December

Cheapest in

October

Average price

C$ 1,088

Good round-trip deal

C$ 646 or less

Good one-way deal

C$ 1,297 or less
Icelandair
  • Icelandair
  • 11/1-27/3
  • Nonstop
  • 15h 35m total
  • Seattle to Reykjavik
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 6 November 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 13/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Fri 27/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 703

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 12/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Tue 31/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 703

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 13/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Thu 26/3

5:00 p.m.-6:00 p.m.

Nonstop8h 00m

C$ 865

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 12/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Thu 26/3

5:00 p.m.-6:00 p.m.

Nonstop8h 00m

C$ 865

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 13/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Mon 30/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 865

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Mon 12/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Mon 30/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 865

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 11/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Mon 30/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 865

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 11/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Thu 26/3

5:00 p.m.-6:00 p.m.

Nonstop8h 00m

C$ 865

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 13/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Sat 28/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 879

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 7/1

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

Nonstop7h 40m

Reykjavik Keflavik Intl

Fri 27/3

7:50 p.m.-8:45 p.m.

Nonstop7h 55m

C$ 879

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 17 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 31 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$ 497). Flying from Seattle to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of C$ 773). 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 November 2025.

It’s typically best to fly out from Seattle to Reykjavik Keflavik Intl Airport in the morning. Doing so could potentially save you 14% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 can get you from Seattle to Reykjavik Keflavik Intl Airport in just under 7h 40m. Your travel time will be generally consistent. Seattle and Reykjavik Keflavik Intl Airport are separated by a distance of 5807 km. All flights are typically direct.

  • 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 airBaltic (100%), Alaska Airlines (80%) and Icelandair (80%).

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

    On average you can expect to pay C$ 1,018 for a flight from Seattle to Reykjavik Keflavik Intl Airport. The cheapest flight overall is C$ 529 while the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl) is currently priced at C$ 666.

  • 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$ 497). Flying from Seattle to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of C$ 773). 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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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.

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