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 $546 round trip and CA $351 one way. Prices and availability subject to change. Additional terms may apply.

Sat., Sep. 27 - Sun., Oct. 5
SEA
Seattle
KEF
Reykjavik
CA $546 Roundtrip, found 23 hours ago
CA $546
Roundtrip
found 23 hours ago
Select Icelandair flight, departing Sat., Sep. 27 from Seattle to Reykjavik, returning Sun., Oct. 5, priced at CA $546 found 23 hours ago
Mon., Sep. 22 - Wed., Oct. 1
SEA
Seattle
KEF
Reykjavik
CA $547 Roundtrip, just found
CA $547
Roundtrip
just found
Select Icelandair flight, departing Mon., Sep. 22 from Seattle to Reykjavik, returning Wed., Oct. 1, priced at CA $547 just found
Fri., Aug. 29 - Tue., Sep. 9
SEA
Seattle
KEF
Reykjavik
CA $562 Roundtrip, found 3 days ago
CA $562
Roundtrip
found 3 days ago
Select Icelandair flight, departing Fri., Aug. 29 from Seattle to Reykjavik, returning Tue., Sep. 9, priced at CA $562 found 3 days ago
Fri., Aug. 22 - Fri., Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $563 Roundtrip, found 13 hours ago
CA $563
Roundtrip
found 13 hours ago
Select Icelandair flight, departing Fri., Aug. 22 from Seattle to Reykjavik, returning Fri., Aug. 29, priced at CA $563 found 13 hours ago
Mon., Sep. 22 - Wed., Oct. 1
SEA
Seattle
KEF
Reykjavik
CA $568 Roundtrip, just found
CA $568
Roundtrip
just found
Select Virgin Atlantic flight, departing Mon., Sep. 22 from Seattle to Reykjavik, returning Wed., Oct. 1, priced at CA $568 just found
Fri., Aug. 22 - Fri., Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $576 Roundtrip, found 13 hours ago
CA $576
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Fri., Aug. 22 from Seattle to Reykjavik, returning Fri., Aug. 29, priced at CA $576 found 13 hours ago
Fri., Aug. 29 - Tue., Sep. 9
SEA
Seattle
KEF
Reykjavik
CA $583 Roundtrip, found 3 days ago
CA $583
Roundtrip
found 3 days ago
Select Virgin Atlantic flight, departing Fri., Aug. 29 from Seattle to Reykjavik, returning Tue., Sep. 9, priced at CA $583 found 3 days ago
Fri., Aug. 22 - Fri., Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $586 Roundtrip, found 13 hours ago
CA $586
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Fri., Aug. 22 from Seattle to Reykjavik, returning Fri., Aug. 29, priced at CA $586 found 13 hours ago
Fri., Aug. 29 - Tue., Sep. 9
SEA
Seattle
KEF
Reykjavik
CA $593 Roundtrip, found 3 days ago
CA $593
Roundtrip
found 3 days ago
Select Air Canada flight, departing Fri., Aug. 29 from Seattle to Reykjavik, returning Tue., Sep. 9, priced at CA $593 found 3 days ago
Fri., Aug. 22 - Fri., Aug. 29
SEA
Seattle
KEF
Reykjavik
CA $595 Roundtrip, found 13 hours ago
CA $595
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Fri., Aug. 22 from Seattle to Reykjavik, returning Fri., Aug. 29, priced at CA $595 found 13 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.