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£294 Cheap Flights from Seattle (SEA) to Reykjavik (KEF)

View £294 flight on Sun, 20 Sept 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Keflavik International Airport (KEF)

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

Prices were available within the past 7 days and start at £294 for one-way flights and £440 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sat, 28 Nov - Sat, 5 Dec
SEA
Seattle
KEF
Reykjavik
£440 Return, found 10 hours ago
£440
Return
found 10 hours ago
Select Icelandair flight, departing Sat, 28 Nov from Seattle to Reykjavik, returning Sat, 5 Dec, priced at £440 found 10 hours ago
Icelandair
Tue, 18 Aug - Tue, 25 Aug
SEA
Seattle
KEF
Reykjavik
£449 Return, found 8 hours ago
£449
Return
found 8 hours ago
Select Icelandair flight, departing Tue, 18 Aug from Seattle to Reykjavik, returning Tue, 25 Aug, priced at £449 found 8 hours ago
KLM
Sat, 10 Oct - Sat, 17 Oct
SEA
Seattle
KEF
Reykjavik
£449 Return, found 2 days ago
£449
Return
found 2 days ago
Select KLM flight, departing Sat, 10 Oct from Seattle to Reykjavik, returning Sat, 17 Oct, priced at £449 found 2 days ago
Virgin Atlantic
Thu, 15 Oct - Thu, 22 Oct
SEA
Seattle
KEF
Reykjavik
£449 Return, found 2 days ago
£449
Return
found 2 days ago
Select Virgin Atlantic flight, departing Thu, 15 Oct from Seattle to Reykjavik, returning Thu, 22 Oct, priced at £449 found 2 days ago
Virgin Atlantic
Mon, 28 Sept - Mon, 5 Oct
SEA
Seattle
KEF
Reykjavik
£451 Return, found 17 hours ago
£451
Return
found 17 hours ago
Select Virgin Atlantic flight, departing Mon, 28 Sept from Seattle to Reykjavik, returning Mon, 5 Oct, priced at £451 found 17 hours ago
Alaska Airlines
Tue, 25 Aug - Tue, 1 Sept
SEA
Seattle
KEF
Reykjavik
£453 Return, found 5 days ago
£453
Return
found 5 days ago
Select Alaska Airlines flight, departing Tue, 25 Aug from Seattle to Reykjavik, returning Tue, 1 Sept, priced at £453 found 5 days ago
Icelandair
Fri, 1 Jan - Fri, 8 Jan
SEA
Seattle
KEF
Reykjavik
£455 Return, found 1 day ago
£455
Return
found 1 day ago
Select Icelandair flight, departing Fri, 1 Jan from Seattle to Reykjavik, returning Fri, 8 Jan, priced at £455 found 1 day ago
Icelandair
Thu, 19 Nov - Thu, 26 Nov
SEA
Seattle
KEF
Reykjavik
£455 Return, found 2 days ago
£455
Return
found 2 days ago
Select Icelandair flight, departing Thu, 19 Nov from Seattle to Reykjavik, returning Thu, 26 Nov, priced at £455 found 2 days ago
Icelandair
Thu, 15 Oct - Thu, 22 Oct
SEA
Seattle
KEF
Reykjavik
£456 Return, found 2 days ago
£456
Return
found 2 days ago
Select Icelandair flight, departing Thu, 15 Oct from Seattle to Reykjavik, returning Thu, 22 Oct, priced at £456 found 2 days ago
Air France
Mon, 24 Aug - Mon, 31 Aug
SEA
Seattle
KEF
Reykjavik
£465 Return, found 5 days ago
£465
Return
found 5 days ago
Select Air France flight, departing Mon, 24 Aug from Seattle to Reykjavik, returning Mon, 31 Aug, priced at £465 found 5 days ago

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 centre is 45 minutes. Flights from £453
KEF
Keflavik Intl.
Cheapest
Average driving time to city centre45 min
Flights from £453

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

September is typically the cheapest month to fly

From £288 - £623 per traveller.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.) cost?
You can find one-way and return flights from SEA to KEF with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SEA to KEF ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
If you're looking for the cheapest time to fly from Seattle - Tacoma Intl. (SEA) to Keflavik Intl. (KEF), September is typically your best bet! You can expect average return flights to be around £485. September often sees lower prices as the peak summer travel season winds down, and demand starts to decrease. Other budget-friendly months to consider for this route include July and August.
Which airlines fly direct from Seattle, WA (SEA) to Reykjavik (KEF)?
Enter SEA to KEF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
Delta offers one of the cheapest connecting return flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.) with a layover in Salt Lake City Intl. (SLC), starting from around £410. Icelandair is one of the cheapest airlines offering nonstop return flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.), with tickets starting from around £442 for flights that can be booked for departure within the next year. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
The best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.) will differ from traveler to traveler. If you like to fly early, Icelandair offers early morning flights. If price is the most important factor, Icelandair typically offers the lowest fares. United offers the most daily flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Seattle, WA (SEA) to Reykjavik (KEF)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
You'll find approximately 3 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to Keflavik Intl. (KEF). For even more choices, look at flights that include layovers, as there are around 70 connecting flights per day. Some common connection points include Vancouver Intl. (YVR), O'Hare Intl. (ORD), and Denver Intl. (DEN).
What is the earliest flight from Seattle, WA (SEA) to Reykjavik (KEF)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Seattle, WA (SEA) to Reykjavik (KEF). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to Keflavik Intl. (KEF) on a Friday, with around 52 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Delta, United, and Alaska Airlines. Flight schedules are quite consistent throughout the week, with Fridays having only slightly more flights than other days.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Keflavik Intl. (KEF) are in the evening, from 6pm to 9pm. Many major carriers, including Icelandair, Alaska Airlines and British Airways, offer flights during this window. Many travellers prefer this timing as it allows you to finish your day in Seattle before heading to the airport, and you'll arrive in Reykjavik ready to start your adventure.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
Direct flights from SEA to KEF usually take about 7 hours 30 minutes, traveling roughly 5,810 kilometers. If you opt for a connecting flight, expect to add around 11 hours 50 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
You can fly business class or first class between SEA and KEF. Airlines that offer business class service on this route include:
  • Lufthansa
  • SAS
  • Edelweiss Air
  • Aer Lingus
  • British Airways
  • Air Canada
  • Alaska Airlines
  • Delta
  • Finnair
  • Icelandair
  • United
  • Virgin Atlantic
First class cabins are available on Alaska Airlines, Icelandair, and United.
How do I earn miles on a Seattle, WA (SEA) to Reykjavik (KEF) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA) to Reykjavik (KEF) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA) to Reykjavik (KEF) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA) to Reykjavik (KEF) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA) to Reykjavik (KEF) flight and hotel package?
Securing a Seattle, WA (SEA) to Reykjavik (KEF) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Reykjavik (KEF-Keflavik Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Keflavik Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, British Airways, Brussels Airlines, Finnair, Icelandair, KLM, Lufthansa, Virgin Atlantic
Return price
£440
Distance
5776 km
Average flight time
14 hours 30 mins

Book with confidence

Compare flights from Seattle to Reykjavik easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Reykjavik. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Keflavik Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Keflavik Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to Keflavik Intl. (KEF)

The easiest way to view the best deals on flights from Seattle to Reykjavik today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to Keflavik Intl. start at just £440 and range up to £465.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Seattle and Reykjavik
  • booking your flight during November, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Seattle to Reykjavik flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Keflavik Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Seattle to Reykjavik easily and book with confidence

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