$428 Cheap Flights from Seattle (SEA) to Reykjavik (KEF)

View $428 flight on Wed, Apr 29, 2026Opens in a new window

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

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Today's featured flight deals from Seattle-Tacoma International Airport (SEA) to Reykjavik–Keflavik Intl. Airport (KEF)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Seattle to Reykjavik (SEA-KEF)

Prices were available within the past 7 days and start at $428 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, Feb 8 - Fri, Feb 13
SEA
Seattle
KEF
Reykjavik
$449 Roundtrip, just found
$449
Roundtrip
just found
Select Icelandair flight, departing Sun, Feb 8 from Seattle to Reykjavik, returning Fri, Feb 13, priced at $449 just found
Icelandair
Sun, Dec 7 - Mon, Dec 15
SEA
Seattle
KEF
Reykjavik
$484 Roundtrip, just found
$484
Roundtrip
just found
Select Icelandair flight, departing Sun, Dec 7 from Seattle to Reykjavik, returning Mon, Dec 15, priced at $484 just found
Icelandair
Mon, Jan 5 - Mon, Jan 12
SEA
Seattle
KEF
Reykjavik
$519 Roundtrip, just found
$519
Roundtrip
just found
Select Icelandair flight, departing Mon, Jan 5 from Seattle to Reykjavik, returning Mon, Jan 12, priced at $519 just found
United
Wed, Dec 31 - Sat, Jan 17
SEA
Seattle
KEF
Reykjavik
$540 Roundtrip, found 1 day ago
$540
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 31 from Seattle to Reykjavik, returning Sat, Jan 17, priced at $540 found 1 day ago
Lufthansa
Mon, Jan 12 - Thu, Jan 22
SEA
Seattle
KEF
Reykjavik
$553 Roundtrip, found 15 hours ago
$553
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Mon, Jan 12 from Seattle to Reykjavik, returning Thu, Jan 22, priced at $553 found 15 hours ago
Swiss International Air Lines
Thu, Feb 5 - Wed, Feb 18
SEA
Seattle
KEF
Reykjavik
$576 Roundtrip, found 6 days ago
$576
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Thu, Feb 5 from Seattle to Reykjavik, returning Wed, Feb 18, priced at $576 found 6 days ago
Delta
Sun, Apr 26 - Tue, May 5
SEA
Seattle
KEF
Reykjavik
$601 Roundtrip, found 17 hours ago
$601
Roundtrip
found 17 hours ago
Select Delta flight, departing Sun, Apr 26 from Seattle to Reykjavik, returning Tue, May 5, priced at $601 found 17 hours ago
United
Mon, Aug 17 - Wed, Aug 26
SEA
Seattle
KEF
Reykjavik
$608 Roundtrip, found 20 hours ago
$608
Roundtrip
found 20 hours ago
Select United flight, departing Mon, Aug 17 from Seattle to Reykjavik, returning Wed, Aug 26, priced at $608 found 20 hours ago
Air Canada
Thu, Aug 13 - Thu, Aug 20
SEA
Seattle
KEF
Reykjavik
$643 Roundtrip, found 3 hours ago
$643
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Thu, Aug 13 from Seattle to Reykjavik, returning Thu, Aug 20, priced at $643 found 3 hours ago
Virgin Atlantic
Wed, Apr 29 - Tue, May 12
SEA
Seattle
KEF
Reykjavik
$660 Roundtrip, found 1 day ago
$660
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Wed, Apr 29 from Seattle to Reykjavik, returning Tue, May 12, priced at $660 found 1 day ago

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

September is typically the cheapest month to fly

From $387 - $908 per traveler.

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 $702
KEF
Keflavik Intl.
Cheapest
Average driving time to city center45 min
Flights from $702

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF) cost?
Snag a cheap one-way flight from $428 or cheap return flight from $449 from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF) 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 Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
February is the most affordable month to fly from SEA to KEF. Traveling during an off-peak travel window is often the key to better flight prices.
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 Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
To find the cheapest airline that'll fly you from SEA to KEF, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Keflavik Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$448
Distance
3610 mi
Average flight time
6 hours 40 mins

Book with confidence

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 February. 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 $428 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.

 

Seattle to Reykjavik Flights

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*Available to One Key members.