Cheap Flights From Seattle - Tacoma Intl. (SEA) To Keflavik Intl. (KEF)

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

The cheapest flights to Keflavik Intl. found within the past 7 days were CA $616 round trip and CA $512 one way. Prices and availability subject to change. Additional terms may apply.

Sun, Nov. 30 - Sat, Feb. 7
SEA
Seattle
KEF
Reykjavik
CA $616 Roundtrip, found 14 hours ago
CA $616
Roundtrip
found 14 hours ago
Select Icelandair flight, departing Sun, Nov. 30 from Seattle to Reykjavik, returning Sat, Feb. 7, priced at CA $616 found 14 hours ago
Fri, Aug. 22 - Fri, Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $634 Roundtrip, found 15 hours ago
CA $634
Roundtrip
found 15 hours ago
Select Icelandair flight, departing Fri, Aug. 22 from Seattle to Reykjavik, returning Fri, Aug. 29, priced at CA $634 found 15 hours ago
Sun, Aug. 17 - Tue, Aug. 26
SEA
Seattle
KEF
Reykjavik
CA $637 Roundtrip, found 9 hours ago
CA $637
Roundtrip
found 9 hours ago
Select Icelandair flight, departing Sun, Aug. 17 from Seattle to Reykjavik, returning Tue, Aug. 26, priced at CA $637 found 9 hours ago
Fri, Sep. 26 - Mon, Oct. 6
SEA
Seattle
KEF
Reykjavik
CA $638 Roundtrip, found 4 days ago
CA $638
Roundtrip
found 4 days ago
Select Virgin Atlantic flight, departing Fri, Sep. 26 from Seattle to Reykjavik, returning Mon, Oct. 6, priced at CA $638 found 4 days ago
Wed, Aug. 20 - Fri, Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $647 Roundtrip, found 16 hours ago
CA $647
Roundtrip
found 16 hours ago
Select Air Canada flight, departing Wed, Aug. 20 from Seattle to Reykjavik, returning Fri, Aug. 29, priced at CA $647 found 16 hours ago
Tue, Sep. 23 - Tue, Sep. 30
SEA
Seattle
KEF
Reykjavik
CA $655 Roundtrip, found 1 day ago
CA $655
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Tue, Sep. 23 from Seattle to Reykjavik, returning Tue, Sep. 30, priced at CA $655 found 1 day ago
Wed, Aug. 20 - Fri, Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $656 Roundtrip, found 16 hours ago
CA $656
Roundtrip
found 16 hours ago
Select Air Canada flight, departing Wed, Aug. 20 from Seattle to Reykjavik, returning Fri, Aug. 29, priced at CA $656 found 16 hours ago
Wed, Aug. 20 - Fri, Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $665 Roundtrip, found 16 hours ago
CA $665
Roundtrip
found 16 hours ago
Select Air Canada flight, departing Wed, Aug. 20 from Seattle to Reykjavik, returning Fri, Aug. 29, priced at CA $665 found 16 hours ago
Mon, Aug. 18 - Mon, Aug. 25
SEA
Seattle
KEF
Reykjavik
CA $669 Roundtrip, found 3 days ago
CA $669
Roundtrip
found 3 days ago
Select Icelandair flight, departing Mon, Aug. 18 from Seattle to Reykjavik, returning Mon, Aug. 25, priced at CA $669 found 3 days ago
Wed, Aug. 20 - Fri, Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $674 Roundtrip, found 16 hours ago
CA $674
Roundtrip
found 16 hours ago
Select Air Canada flight, departing Wed, Aug. 20 from Seattle to Reykjavik, returning Fri, Aug. 29, priced at CA $674 found 16 hours ago

Frequently asked questions

Are there direct flights from SEA to KEF?
If you'd prefer to avoid layovers, it's wise to book your flight from Sea-Tac Airport to Keflavik Intl. Airport (KEF) in advance. Icelandair is the only air carrier that offers direct flights between Seattle and Reykjanesbær.
What airlines fly from Sea-Tac Airport to KEF?
With Icelandair, you won't have to put up with extended layovers or hanging about waiting for your next flight. This top-rated airline will fly you directly from Seattle to Reykjanesbær on one of the 30 flights servicing this route every month.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.