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$345+ Cheap flights from Seattle (SEA) to Iceland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
Sep 1 — Sep 81
Tue 9/1
Tue 9/8
1 adult, Economy
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Cheap flight deals from Seattle to Iceland

Cheapest flights from Seattle to Iceland
Explore the most affordable flight options available from Seattle to Iceland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.

This Ticket deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Thu 10/17:45 pm
KEF
-
SEA
Nonstop7h 55m
Icelandair
Deal found 8/1$544
This Cheapflightsfares deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Sun 10/187:45 pm
KEF
-
SEA
Nonstop7h 55m
Icelandair
Deal found 7/29$560
This Cheapflightsfares deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Tue 11/35:00 pm
KEF
-
SEA
Nonstop8h 00m
Icelandair
Deal found 7/28$561
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/12:35 pm
SEA
-
KEF
Nonstop7h 40m
Icelandair
Mon 12/75:00 pm
KEF
-
SEA
Nonstop8h 00m
Icelandair
Deal found 7/30$562
This SmartFares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Thu 9/34:50 pm
KEF
-
SEA
Nonstop8h 05m
Icelandair
Deal found 7/30$566
This SmartFares deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:25 pm
SEA
-
KEF
Nonstop7h 35m
Icelandair
Wed 9/24:50 pm
KEF
-
SEA
Nonstop8h 05m
Icelandair
Deal found 7/29$567
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3011:20 am
SEA
-
KEF
1 stop13h 20m
Delta
Wed 8/59:30 am
KEF
-
SEA
1 stop19h 30m
Delta
Deal found 7/28$570
This Cheapflightsfares deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Wed 9/210:40 am
KEF
-
SEA
Nonstop8h 05m
Icelandair
Deal found 7/29$572
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Sat 8/2910:40 am
KEF
-
SEA
Nonstop8h 05m
Icelandair
Deal found 7/30$573
This Gotogate deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:00 pm
SEA
-
KEF
Nonstop7h 25m
Icelandair
Sun 9/277:45 pm
KEF
-
SEA
Nonstop7h 55m
Icelandair
Deal found 7/28$576
This Gotogate deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/113:40 pm
SEA
-
KEF
Nonstop7h 35m
Icelandair
Fri 9/184:50 pm
KEF
-
SEA
Nonstop8h 05m
Icelandair
Deal found 7/28$577
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:45 am
SEA
-
KEF
1 stop14h 55m
Delta
Mon 8/109:30 am
KEF
-
SEA
1 stop14h 30m
Delta
Deal found 7/28$578

Find flight deals from Seattle to Iceland

Keep the following information in mind while searching for Seattle to Iceland flight deals. Data was last updated August 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$544
(Ticket)

One-way from

$345
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$711

Good round-trip deal

$544 or less

Good one-way deal

$291 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Reykjavik (REK) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Reykjavik (REK) flights.
Search Deals
From Seattle/Tacoma Intl to Iceland
Search Deals
One-way flight from Seattle/Tacoma Intl to Iceland
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Iceland.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Iceland.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Iceland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 2, 2026.
Use the filters below to find and compare flights from Seattle to Iceland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 9/24

6:00 am-7:00 am

1 stop18h 00m

Reykjavik Keflavik Intl

Mon 10/5

9:30 am-11:55 pm

1 stop21h 25m

$619

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 9/11

10:40 pm-9:30 am

1 stop27h 50m

Reykjavik Keflavik Intl

Fri 9/18

11:25 am-11:59 pm

2 stops19h 34m

$624

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 9/16

6:00 am-7:00 am

1 stop18h 00m

Reykjavik Keflavik Intl

Wed 9/23

11:25 am-11:20 pm

1 stop18h 55m

$628

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 8/27

7:16 am-9:30 am

2 stops19h 14m

Reykjavik Keflavik Intl

Wed 9/2

11:25 am-11:20 pm

1 stop18h 55m

$632
Quickest round-trip

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 8/13

9:53 am-7:40 am

1 stop14h 47m

Reykjavik Keflavik Intl

Fri 8/21

9:30 am-6:44 pm

2 stops16h 14m

$632

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sat 10/17

7:15 am-9:30 am

1 stop19h 15m

Reykjavik Keflavik Intl

Tue 10/20

11:25 am-11:04 pm

1 stop18h 39m

$713

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 10/2

11:13 pm-7:55 am

2 stops25h 42m

Reykjavik Keflavik Intl

Tue 10/6

10:00 am-11:27 am

2 stops32h 27m

$753

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Fri 10/16

11:13 pm-7:55 am

2 stops25h 42m

Reykjavik Keflavik Intl

Tue 10/20

10:00 am-4:05 pm

2 stops37h 05m

$753

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 9/16

10:42 am-8:50 am

1 stop15h 08m

Reykjavik Keflavik Intl

Wed 9/23

9:15 am-4:05 pm

2 stops37h 50m

$758

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 9/23

7:00 am-8:50 am

1 stop18h 50m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-10:56 pm

2 stops44h 41m

$758

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Seattle to Iceland

Have a flexible travel schedule? Discover the best time to fly to Iceland from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Iceland

What is the cheapest month to book a flight from Seattle to Iceland?

Currently, October is the cheapest month in which you can book a flight from Seattle to Iceland (average of $494). Flying from Seattle to Iceland in December is currently the most expensive (average of $818). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to IS?

Find hourly flight availability from Seattle to Iceland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 2, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Iceland as you normally would.

Weekly flight availability from Seattle to Iceland

Explore weekly flight availability from Seattle to Iceland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 2, 2026.

The most flights from SEA to IS0 are scheduled on a Monday (7 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (3 on average).

How far ahead should I book a flight from Seattle to Iceland?

The best time to book flights from Seattle to Iceland is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Iceland

Get insights into the airlines that provide service to Iceland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Iceland. Reviews last updated August 2, 2026.
Read through reviews of airlines operating flights from Seattle to Iceland, such as Alaska Airlines and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,749 reviews

Crew

8.5

Overall

7.9

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska Airlines
7.9
Good
12,749 reviews
Alaska Airlines
7.9
Good
12,749 reviews

Crew

8.5

Overall

7.9

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Icelandair
7.0
Good
717 reviews
Alaska Airlines
7.9
Good
12,749 reviews

Crew

8.5

Overall

7.9

Comfort

7.8

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Related info for your journey

Find useful and relevant information for your journey from Seattle to Iceland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Iceland?

    If you book a flight to Iceland from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How long is the flight from Seattle to Iceland?

    Departing from Seattle to Iceland will take you 18h. Airlines will cover a distance of 3608 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest flights from Seattle to Iceland?

    While on average a flight from Seattle to Iceland is generally $1,836, our data shows the cheapest flight currently is $192. When looking at the most popular route, (Seattle/Tacoma Intl - Reykjavik Keflavik Intl), you can expect to pay $560 for that flight.

  • Can I find deals for flights from Seattle to Iceland that include hotel bookings?

    Yes. In addition to deals on Seattle to Iceland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Iceland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Iceland.

  • Can I find deals for business class flights from Seattle to Iceland?

    Yes. Cheapflights offers flight deals from Seattle to Iceland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Iceland?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Iceland (average of $494). Flying from Seattle to Iceland in December is currently the most expensive (average of $818). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Seattle to Iceland

Discover the top 2 airlines that operate flights from Seattle to Iceland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$362Average$653FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$496Average$810FlexibilityNo cancel feeOn-time75%

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