$267 Cheap Flights from Reykjavik (KEF) to Seattle (SEA)

View $267 flight on Tue, Oct 7, 2025Opens in a new window

Popular airlines from Reykjavik–Keflavik Intl. Airport (KEF) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Reykjavik to Seattle (KEF-SEA)

Prices were available within the past 7 days and start at $267 for one-way flights and $617 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Thu, Sep 18 - Sun, Oct 5
KEF
Reykjavik
SEA
Seattle
$617 Roundtrip, found 4 days ago
$617
Roundtrip
found 4 days ago
Select Scandinavian Airlines flight, departing Thu, Sep 18 from Reykjavik to Seattle, returning Sun, Oct 5, priced at $617 found 4 days ago
Scandinavian Airlines
Sat, May 23 - Sat, May 30
KEF
Reykjavik
SEA
Seattle
$634 Roundtrip, found 4 days ago
$634
Roundtrip
found 4 days ago
Select Scandinavian Airlines flight, departing Sat, May 23 from Reykjavik to Seattle, returning Sat, May 30, priced at $634 found 4 days ago
Scandinavian Airlines
Sat, May 23 - Sat, May 30
KEF
Reykjavik
SEA
Seattle
$665 Roundtrip, found 4 days ago
$665
Roundtrip
found 4 days ago
Select Scandinavian Airlines flight, departing Sat, May 23 from Reykjavik to Seattle, returning Sat, May 30, priced at $665 found 4 days ago
Icelandair
Thu, Apr 30 - Tue, May 5
KEF
Reykjavik
SEA
Seattle
$676 Roundtrip, found 2 days ago
$676
Roundtrip
found 2 days ago
Select Icelandair flight, departing Thu, Apr 30 from Reykjavik to Seattle, returning Tue, May 5, priced at $676 found 2 days ago
Icelandair
Sun, Dec 14 - Fri, Dec 19
KEF
Reykjavik
SEA
Seattle
$680 Roundtrip, found 4 hours ago
$680
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Sun, Dec 14 from Reykjavik to Seattle, returning Fri, Dec 19, priced at $680 found 4 hours ago
Icelandair
Fri, Dec 19 - Sun, Dec 28
KEF
Reykjavik
SEA
Seattle
$681 Roundtrip, found 3 days ago
$681
Roundtrip
found 3 days ago
Select Icelandair flight, departing Fri, Dec 19 from Reykjavik to Seattle, returning Sun, Dec 28, priced at $681 found 3 days ago
Scandinavian Airlines
Thu, Oct 23 - Tue, Oct 28
KEF
Reykjavik
SEA
Seattle
$685 Roundtrip, found 6 days ago
$685
Roundtrip
found 6 days ago
Select Scandinavian Airlines flight, departing Thu, Oct 23 from Reykjavik to Seattle, returning Tue, Oct 28, priced at $685 found 6 days ago
Air Canada
Thu, Aug 14 - Sat, Aug 23
KEF
Reykjavik
SEA
Seattle
$859 Roundtrip, found 17 hours ago
$859
Roundtrip
found 17 hours ago
Select Air Canada flight, departing Thu, Aug 14 from Reykjavik to Seattle, returning Sat, Aug 23, priced at $859 found 17 hours ago
Lufthansa
Sat, Oct 18 - Sat, Oct 25
KEF
Reykjavik
SEA
Seattle
$880 Roundtrip, found 4 hours ago
$880
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Sat, Oct 18 from Reykjavik to Seattle, returning Sat, Oct 25, priced at $880 found 4 hours ago
United
Thu, Aug 14 - Thu, Aug 21
KEF
Reykjavik
SEA
Seattle
$883 Roundtrip, found 20 hours ago
$883
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Aug 14 from Reykjavik to Seattle, returning Thu, Aug 21, priced at $883 found 20 hours ago

Find the cheapest month to fly from Reykjavik (KEF) to Seattle (SEA)

May is typically the cheapest month to fly

From $485 - $903 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $820
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $820
0
Flights from Reykjavik (KEF) to Seattle (SEA)
Origin airport
Keflavik Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Scandinavian Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$617
Distance
3610 mi

Reykjavik to Seattle Flights

The cheapest times to fly from Reykjavik to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Reykjavik to Seattle are during the month of September. You can find some of the cheapest flights from Reykjavik to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Reykjavik to Seattle

Sunday is one of the best days to book for cheap flights from Reykjavik to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Reykjavik to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Reykjavik to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $267 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Reykjavik to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Reykjavik to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag cheap return fares starting from $721 from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Icelandair flight leaving KEF on August 17 2025 and touching down at SEA. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from KEF to SEA?
The cheapest flights from KEF to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
When flying out of Keflavik Intl. Airport (KEF), you can board a nonstop flight to Seattle - Tacoma Intl. Airport (SEA) with Icelandair.
What is the cheapest airline that flies from KEF to SEA?
With prices as low as $513 for a one-way flight from KEF to SEA, Icelandair is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from KEF on October 18 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
On average, Keflavik Intl. Airport (KEF) only offers 1 nonstop flight to Seattle - Tacoma Intl. Airport (SEA) daily. For more choices, try our easy-to-use filter tool. Just enter your dates of travel, then click on "1 Stop" or "2+ Stops" to discover flights offering layovers.
What are the most popular departure times for flights from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
Flights between KEF and SEA are busiest at 5 PM. If you're after a more relaxed experience and potentially cheaper prices, choose a departure outside the usual busy windows.
What day of the week has the most flights from KEF to SEA?
If you fly on a Friday, you'll get the greatest range of options for flights from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
Keflavik Intl. Airport (KEF)'s earliest flight to Seattle - Tacoma Intl. Airport (SEA) is at approximately 5:05PM UTC+0. With a total journey time of 7h 55m, you'll land at around 5:00PM UTC-8.
How long does it take to fly from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight time from KEF to SEA is 7 hours and 55 minutes, covering a total distance of 3,600 mi.
What is the best time to fly from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA) route, fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Keflavik Intl. Airport (KEF)?
Seattle - Tacoma Intl. Airport (SEA) is the only airport in Seattle with direct flights from Keflavik Intl. Airport (KEF). Check out your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your departure to book your flight from KEF to SEA often results in higher prices. While you may find some last-minute offers, they aren't always guaranteed. Be flexible with your travel plans for the best chance of scoring a bargain.
Is it cheaper to book a KEF to SEA flight and hotel package?
Booking a KEF to SEA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our wide range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
It's usually possible to reschedule or cancel your KEF to SEA flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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