$257 Cheap Flights from Seattle (SEA) to Reykjavik (KEF)

View $257 flight on Wed, Oct 8, 2025Opens in a new window

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

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Cheap Flights from Seattle to Reykjavik (SEA-KEF)

Prices were available within the past 7 days and start at $257 for one-way flights and $449 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sun, Nov 2 - Sat, Nov 8
SEA
Seattle
KEF
Reykjavik
$449 Roundtrip, found 4 days ago
$449
Roundtrip
found 4 days ago
Select Icelandair flight, departing Sun, Nov 2 from Seattle to Reykjavik, returning Sat, Nov 8, priced at $449 found 4 days ago
Icelandair
Sun, Aug 17 - Tue, Aug 26
SEA
Seattle
KEF
Reykjavik
$461 Roundtrip, just found
$461
Roundtrip
just found
Select Icelandair flight, departing Sun, Aug 17 from Seattle to Reykjavik, returning Tue, Aug 26, priced at $461 just found
United
Tue, Aug 12 - Wed, Aug 20
SEA
Seattle
KEF
Reykjavik
$466 Roundtrip, found 21 hours ago
$466
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Aug 12 from Seattle to Reykjavik, returning Wed, Aug 20, priced at $466 found 21 hours ago
United
Fri, Aug 22 - Thu, Aug 28
SEA
Seattle
KEF
Reykjavik
$471 Roundtrip, found 1 hour ago
$471
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Aug 22 from Seattle to Reykjavik, returning Thu, Aug 28, priced at $471 found 1 hour ago
Air Canada
Sat, Aug 23 - Sat, Aug 30
SEA
Seattle
KEF
Reykjavik
$471 Roundtrip, just found
$471
Roundtrip
just found
Select Air Canada flight, departing Sat, Aug 23 from Seattle to Reykjavik, returning Sat, Aug 30, priced at $471 just found
Virgin Atlantic
Mon, Sep 22 - Wed, Oct 1
SEA
Seattle
KEF
Reykjavik
$473 Roundtrip, found 4 hours ago
$473
Roundtrip
found 4 hours ago
Select Virgin Atlantic flight, departing Mon, Sep 22 from Seattle to Reykjavik, returning Wed, Oct 1, priced at $473 found 4 hours ago
Delta
Mon, Sep 22 - Wed, Oct 1
SEA
Seattle
KEF
Reykjavik
$473 Roundtrip, found 4 hours ago
$473
Roundtrip
found 4 hours ago
Select Delta flight, departing Mon, Sep 22 from Seattle to Reykjavik, returning Wed, Oct 1, priced at $473 found 4 hours ago
KLM
Tue, Sep 30 - Tue, Oct 7
SEA
Seattle
KEF
Reykjavik
$525 Roundtrip, found 17 hours ago
$525
Roundtrip
found 17 hours ago
Select KLM flight, departing Tue, Sep 30 from Seattle to Reykjavik, returning Tue, Oct 7, priced at $525 found 17 hours ago
Lufthansa
Wed, Apr 1 - Thu, Apr 30
SEA
Seattle
KEF
Reykjavik
$542 Roundtrip, found 3 days ago
$542
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Wed, Apr 1 from Seattle to Reykjavik, returning Thu, Apr 30, priced at $542 found 3 days ago
WestJet
Sun, Oct 5 - Tue, Oct 7
SEA
Seattle
KEF
Reykjavik
$548 Roundtrip, found 1 day ago
$548
Roundtrip
found 1 day ago
Select WestJet flight, departing Sun, Oct 5 from Seattle to Reykjavik, returning Tue, Oct 7, priced at $548 found 1 day ago

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

October is typically the cheapest month to fly

From $386 - $962 per traveler.

Graph displaying average flight prices per month

Alternative airports near Reykjavik

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

Select flight to Keflavik Intl. KEF. Cheapest option available. Average driving time to city center is 45 minutes. Flights from $511
KEF
Keflavik Intl.
Cheapest
Average driving time to city center45 min
Flights from $511
Flights from Seattle (SEA) to Reykjavik (KEF)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Keflavik Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, United, Virgin Atlantic, WestJet
Roundtrip price
$448
Distance
3610 mi
Average flight time
14 hours 28 mins

Seattle to Reykjavik Flights

The cheapest times to fly from Seattle to Reykjavik

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 Seattle to Reykjavik are during the month of November. You can find some of the cheapest flights from Seattle to Reykjavik with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Reykjavik

Sunday is one of the best days to book for cheap flights from Seattle to Reykjavik: 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 Seattle to Reykjavik

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 Seattle to Reykjavik in 2025. You can also book with separate airlines for your outbound and return journeys, from $257 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 Seattle to Reykjavik 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 Seattle to Reykjavik 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 Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF) cost?
You can land affordable return tickets from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF) starting from $449. Grab a seat and take off on your trip. 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 SEA on August 10 2025 and touching down at KEF. The price was last updated on July 14 2025 and has not changed since.
What is the cheapest month to fly from SEA to KEF?
To land a cheap ticket, look for nonstop flights from SEA to KEF leaving in June. You can find a one-way Icelandair flight for $523 leaving on June 6 2026. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 14 2025 and remains unchanged.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
When departing from Seattle - Tacoma Intl. Airport (SEA), you can board a direct flight to Keflavik Intl. Airport (KEF) with Icelandair.
What is the cheapest airline that flies from SEA to KEF?
With tickets starting at $523 for a one-way flight from SEA to KEF, Icelandair is currently the cheapest carrier on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on October 3 2025. Prices were last updated on July 14 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
On average, only 1 nonstop flight departs daily from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF). Need other options? Use our filters to discover flights with layovers and squeeze another destination into your itinerary.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
Flights between SEA and KEF are busiest at 2 PM. If you want a quieter trip and possibly cheaper fares, look for a departure outside the usual busy windows.
What day of the week has the most flights from SEA to KEF?
If you travel on a Friday, you'll get the largest range of choices for flights from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF).
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
The first flight of the day jetting off from Seattle - Tacoma Intl. Airport (SEA) is at around 2:35PM UTC-8. Catch this flight and you'll reach Keflavik Intl. Airport (KEF) at approximately 6:15AM UTC+0. The total flight duration is 7h 40m.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
It takes about 7 hours and 40 minutes to travel the 3,600 mi from SEA to KEF.
What airline has the least delays from SEA to KEF?
With 81% of journeys generally arriving on schedule, Icelandair has the best on-time performance for direct flights from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF). To keep track of your flight status and get notified if anything changes, use the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
To arrive at Keflavik Intl. Airport (KEF) on schedule, choose a flight that takes off from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Reykjavik from Seattle - Tacoma Intl. Airport (SEA)?
Browse your flight options from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF). This is the only airport in Reykjavik you can fly into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF) last-minute?
Last-minute fares from SEA to KEF are usually more expensive. To secure the cheapest rates, start looking for flights early. That said, if you can play around with your travel dates, it's possible to land a cheap fare right before your trip.
Is it cheaper to book a SEA to KEF flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to KEF flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place will take the stress out of planning your trip. Simply pick your flights and choose from our extensive range of hotels, then personalize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
In most cases, you can cancel or reschedule your SEA to KEF flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you want further details, go to our Customer Service portal.

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