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 $624 round trip and CA $606 one way. Prices and availability subject to change. Additional terms may apply.

Sun, Apr 19 - Sat, Apr 25
SEA
Seattle
KEF
Reykjavik
CA $624 Roundtrip, found 5 days ago
CA $624
Roundtrip
found 5 days ago
Select Icelandair flight, departing Sun, Apr 19 from Seattle to Reykjavik, returning Sat, Apr 25, priced at CA $624 found 5 days ago
Wed, Apr 22 - Sun, Apr 26
SEA
Seattle
KEF
Reykjavik
CA $625 Roundtrip, found 2 days ago
CA $625
Roundtrip
found 2 days ago
Select Icelandair flight, departing Wed, Apr 22 from Seattle to Reykjavik, returning Sun, Apr 26, priced at CA $625 found 2 days ago
Mon, Apr 20 - Fri, Apr 24
SEA
Seattle
KEF
Reykjavik
CA $626 Roundtrip, found 6 days ago
CA $626
Roundtrip
found 6 days ago
Select Icelandair flight, departing Mon, Apr 20 from Seattle to Reykjavik, returning Fri, Apr 24, priced at CA $626 found 6 days ago
Wed, Apr 22 - Sun, Apr 26
SEA
Seattle
KEF
Reykjavik
CA $628 Roundtrip, found 2 days ago
CA $628
Roundtrip
found 2 days ago
Select Icelandair flight, departing Wed, Apr 22 from Seattle to Reykjavik, returning Sun, Apr 26, priced at CA $628 found 2 days ago
Mon, Apr 20 - Fri, Apr 24
SEA
Seattle
KEF
Reykjavik
CA $629 Roundtrip, found 6 days ago
CA $629
Roundtrip
found 6 days ago
Select Icelandair flight, departing Mon, Apr 20 from Seattle to Reykjavik, returning Fri, Apr 24, priced at CA $629 found 6 days ago
Sun, Apr 19 - Sat, Apr 25
SEA
Seattle
KEF
Reykjavik
CA $646 Roundtrip, found 5 days ago
CA $646
Roundtrip
found 5 days ago
Select Virgin Atlantic flight, departing Sun, Apr 19 from Seattle to Reykjavik, returning Sat, Apr 25, priced at CA $646 found 5 days ago
Mon, Apr 20 - Fri, Apr 24
SEA
Seattle
KEF
Reykjavik
CA $648 Roundtrip, found 6 days ago
CA $648
Roundtrip
found 6 days ago
Select Virgin Atlantic flight, departing Mon, Apr 20 from Seattle to Reykjavik, returning Fri, Apr 24, priced at CA $648 found 6 days ago
Fri, May 8 - Tue, May 12
SEA
Seattle
KEF
Reykjavik
CA $693 Roundtrip, found 6 days ago
CA $693
Roundtrip
found 6 days ago
Select Icelandair flight, departing Fri, May 8 from Seattle to Reykjavik, returning Tue, May 12, priced at CA $693 found 6 days ago
Sun, Jun 21 - Mon, Jun 29
SEA
Seattle
KEF
Reykjavik
CA $694 Roundtrip, found 3 days ago
CA $694
Roundtrip
found 3 days ago
Select Icelandair flight, departing Sun, Jun 21 from Seattle to Reykjavik, returning Mon, Jun 29, priced at CA $694 found 3 days ago
Tue, Jun 16 - Sat, Jun 20
SEA
Seattle
KEF
Reykjavik
CA $695 Roundtrip, found 6 days ago
CA $695
Roundtrip
found 6 days ago
Select Icelandair flight, departing Tue, Jun 16 from Seattle to Reykjavik, returning Sat, Jun 20, priced at CA $695 found 6 days 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.

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*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.