$447 Cheap Flights from Reykjavik (KEF) to Seattle (SEA)

View $447 flight on Sat, May 30, 2026Opens in a new window

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

Cheap Flights from Reykjavik to Seattle (KEF-SEA)

Prices were available within the past 7 days and start at $447 for one-way flights and $361 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sat, Jan 17 - Thu, Feb 5
KEF
Reykjavik
SEA
Seattle
$361 Roundtrip, found 4 hours ago
$361
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Sat, Jan 17 from Reykjavik to Seattle, returning Thu, Feb 5, priced at $361 found 4 hours ago
Icelandair
Thu, Feb 19 - Thu, Feb 26
KEF
Reykjavik
SEA
Seattle
$366 Roundtrip, found 1 day ago
$366
Roundtrip
found 1 day ago
Select Icelandair flight, departing Thu, Feb 19 from Reykjavik to Seattle, returning Thu, Feb 26, priced at $366 found 1 day ago
Icelandair
Thu, Dec 4 - Wed, Dec 10
KEF
Reykjavik
SEA
Seattle
$404 Roundtrip, found 2 days ago
$404
Roundtrip
found 2 days ago
Select Icelandair flight, departing Thu, Dec 4 from Reykjavik to Seattle, returning Wed, Dec 10, priced at $404 found 2 days ago
Icelandair
Sat, Jan 17 - Thu, Feb 5
KEF
Reykjavik
SEA
Seattle
$444 Roundtrip, found 4 hours ago
$444
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Sat, Jan 17 from Reykjavik to Seattle, returning Thu, Feb 5, priced at $444 found 4 hours ago
Icelandair
Thu, Feb 19 - Thu, Feb 26
KEF
Reykjavik
SEA
Seattle
$449 Roundtrip, found 1 day ago
$449
Roundtrip
found 1 day ago
Select Icelandair flight, departing Thu, Feb 19 from Reykjavik to Seattle, returning Thu, Feb 26, priced at $449 found 1 day ago
Icelandair
Thu, Dec 4 - Wed, Dec 10
KEF
Reykjavik
SEA
Seattle
$487 Roundtrip, found 2 days ago
$487
Roundtrip
found 2 days ago
Select Icelandair flight, departing Thu, Dec 4 from Reykjavik to Seattle, returning Wed, Dec 10, priced at $487 found 2 days ago
Scandinavian Airlines
Sat, Sep 5 - Sat, Sep 19
KEF
Reykjavik
SEA
Seattle
$657 Roundtrip, just found
$657
Roundtrip
just found
Select Scandinavian Airlines flight, departing Sat, Sep 5 from Reykjavik to Seattle, returning Sat, Sep 19, priced at $657 just found
Alaska Airlines
Fri, Aug 28 - Tue, Sep 1
KEF
Reykjavik
SEA
Seattle
$763 Roundtrip, found 2 days ago
$763
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Aug 28 from Reykjavik to Seattle, returning Tue, Sep 1, priced at $763 found 2 days ago
Air Canada
Sat, Sep 5 - Sat, Sep 19
KEF
Reykjavik
SEA
Seattle
$889 Roundtrip, just found
$889
Roundtrip
just found
Select Air Canada flight, departing Sat, Sep 5 from Reykjavik to Seattle, returning Sat, Sep 19, priced at $889 just found
United
Sat, Aug 8 - Thu, Aug 20
KEF
Reykjavik
SEA
Seattle
$923 Roundtrip, found 1 day ago
$923
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 8 from Reykjavik to Seattle, returning Thu, Aug 20, priced at $923 found 1 day ago

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

October is typically the cheapest month to fly

From $454 - $1,066 per traveler.

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 $967
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $967
0
Flights from Reykjavik (KEF) to Seattle (SEA)
Origin airport
Keflavik Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, American Airlines, British Airways, Delta, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, United, Virgin Atlantic, WestJet
Roundtrip price
$361
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 January. 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 $447 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?
Get a cheap one-way flight from $447 or cheap return flight from $361 from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
Planning your trip for January is a good way to save, as it's the cheapest month for flights between KEF and SEA. You'll usually find the lowest fares during the off-season.
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 Keflavik Intl. Airport (KEF) to Seattle - Tacoma Intl. Airport (SEA)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from KEF to SEA. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
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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*Available to One Key members.