₩599,400 Cheap Flights from Seattle (SEA) to Reykjavik (KEF)

View ₩599,400 flight on Tue, May 5, 2026Opens in a new window

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

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Cheap Flights from Seattle to Reykjavik (SEA-KEF)

Prices were available within the past 7 days and start at ₩599,400 for one-way flights and ₩776,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Oct 20 - Sun, Oct 26
SEA
Seattle
KEF
Reykjavik
₩776,600 Roundtrip, found 6 days ago
₩776,600
Roundtrip
found 6 days ago
Select United flight, departing Mon, Oct 20 from Seattle to Reykjavik, returning Sun, Oct 26, priced at ₩776,600 found 6 days ago
Delta
Sat, Oct 18 - Sat, Oct 25
SEA
Seattle
KEF
Reykjavik
₩798,700 Roundtrip, found 6 days ago
₩798,700
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Oct 18 from Seattle to Reykjavik, returning Sat, Oct 25, priced at ₩798,700 found 6 days ago
Lufthansa
Mon, Oct 20 - Sun, Oct 26
SEA
Seattle
KEF
Reykjavik
₩803,100 Roundtrip, found 6 days ago
₩803,100
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Oct 20 from Seattle to Reykjavik, returning Sun, Oct 26, priced at ₩803,100 found 6 days ago
United
Fri, Oct 17 - Sun, Oct 26
SEA
Seattle
KEF
Reykjavik
₩810,000 Roundtrip, found 6 days ago
₩810,000
Roundtrip
found 6 days ago
Select United flight, departing Fri, Oct 17 from Seattle to Reykjavik, returning Sun, Oct 26, priced at ₩810,000 found 6 days ago
United
Wed, Oct 22 - Sun, Nov 2
SEA
Seattle
KEF
Reykjavik
₩815,600 Roundtrip, found 6 days ago
₩815,600
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 22 from Seattle to Reykjavik, returning Sun, Nov 2, priced at ₩815,600 found 6 days ago
United
Wed, Oct 22 - Thu, Nov 6
SEA
Seattle
KEF
Reykjavik
₩827,300 Roundtrip, found 6 days ago
₩827,300
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 22 from Seattle to Reykjavik, returning Thu, Nov 6, priced at ₩827,300 found 6 days ago
United
Wed, Oct 22 - Fri, Nov 7
SEA
Seattle
KEF
Reykjavik
₩846,200 Roundtrip, found 6 days ago
₩846,200
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 22 from Seattle to Reykjavik, returning Fri, Nov 7, priced at ₩846,200 found 6 days ago
Lufthansa
Mon, Oct 20 - Sun, Nov 2
SEA
Seattle
KEF
Reykjavik
₩847,700 Roundtrip, found 6 days ago
₩847,700
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Oct 20 from Seattle to Reykjavik, returning Sun, Nov 2, priced at ₩847,700 found 6 days ago
Air Canada
Wed, Sep 17 - Thu, Oct 16
SEA
Seattle
KEF
Reykjavik
₩915,400 Roundtrip, found 3 days ago
₩915,400
Roundtrip
found 3 days ago
Select Air Canada flight, departing Wed, Sep 17 from Seattle to Reykjavik, returning Thu, Oct 16, priced at ₩915,400 found 3 days ago
Icelandair
Mon, Oct 20 - Thu, Oct 30
SEA
Seattle
KEF
Reykjavik
₩1,027,300 Roundtrip, found 6 days ago
₩1,027,300
Roundtrip
found 6 days ago
Select Icelandair flight, departing Mon, Oct 20 from Seattle to Reykjavik, returning Thu, Oct 30, priced at ₩1,027,300 found 6 days ago

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

October is typically the cheapest month to fly

From ₩536,928 - ₩1,355,004 per traveler.

Graph displaying average flight prices per month

Flights from Seattle (SEA) to Reykjavik (KEF)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Keflavik Intl.
Roundtrip price
₩776,600
Distance
5776 km
Average flight time
14 hours 28 mins

Seattle to Suðurnesjabær Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Seattle to Suðurnesjabær will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Suðurnesjabær.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with SEA to KEF flights that won’t make your bank account wince. Ready to temporarily leave behind Seattle for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to KEF with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Frequently asked questions

How much is a flight from Sea-Tac Airport to Reykjavík–Keflavík Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip flight from SEA to Reykjavík–Keflavík Airport was ₩776,600. Fares this good don't last long, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Keflavik Intl. Airport (KEF)?
Each air carrier has its own terms and conditions. If you do decide to cancel, follow the instructions on our Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Sea-Tac Airport to KEF flights, you'll see a "no change fees" filter for you to select.
How far is the flight from SEA to Reykjavík–Keflavík Airport?
With a flight distance of 5,800 kilometers between Sea-Tac Airport and Keflavik Intl. Airport (KEF), this is a long-haul flight. Make sure you stay hydrated and move your legs from time to time.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF)?
Check out Icelandair (FI) if you want to fly directly from Seattle - Tacoma Intl. Airport (SEA) to KEF. This top airline operates 30 flights monthly, so you're sure to find one that fits your travel plans.
Are Sea-Tac Airport to Reykjavík–Keflavík Airport flight tickets cheaper when they're purchased at the last minute?
It is possible to pick up an awesome last-minute deal from Seattle - Tacoma Intl. Airport (SEA) to Keflavik Intl. Airport (KEF), but it can also be hit-or-miss. As many airlines release seats up to 12 months in advance, it's worth keeping an eye on fares early and being ready to book when you spot a bargain. Expedia compares air carrier prices and updates flight deals often, so you can be certain you're always getting the latest offers.

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