Keflavik Intl

$376+ Cheap flights from Seattle (SEA) to Keflavik Intl (KEF)

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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KEF
Feb 18 — Feb 251
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The best prices from Seattle/Tacoma Intl to Reykjavik Keflavik Intl are usually found in May or November, booked 82 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Seattle to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Keflavik Intl (KEF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$623
(Kiwi.com)

One-way from

$376
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$774

Good round-trip deal

$597 or less

Good one-way deal

$418 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Reykjavik Keflavik Intl flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Reykjavik Keflavik Intl flights.
From Seattle/Tacoma Intl to Reykjavik Keflavik Intl
One-way flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl
High demand for flights, 0% potential price rise
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.
Price to beat on a one-way flight from Seattle/Tacoma Intl to Reykjavik Keflavik Intl.

Find flight deals from Seattle to Keflavik Intl

Cheapest flights from Seattle to Keflavik Intl
Explore the most affordable flight options available from Seattle to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2025.

This Orbitz deal was found by Cheapflights users on 2/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/148:20 pmSEA - KEF
1 stop30h 20mBritish Airways
Mon 5/1910:45 amKEF - SEA
1 stop31h 25mBritish Airways
Deal found 2/13$623
This Justfly.com deal was found by Cheapflights users on 2/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/411:40 amSEA - KEF
2 stops37h 55mAir Canada
Tue 6/1010:00 amKEF - SEA
2 stops40h 37mAir Canada
Deal found 2/13$625
This Mytrip deal was found by Cheapflights users on 2/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2212:30 pmSEA - KEF
3 stops33h 15mMultiple Airlines
Tue 4/293:50 pmKEF - SEA
3 stops35h 11mMultiple Airlines
Deal found 2/13$628
This FlightHub deal was found by Cheapflights users on 2/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/207:00 pmSEA - KEF
Nonstop7h 25mIcelandair
Sun 5/257:45 pmKEF - SEA
Nonstop7h 55mIcelandair
Deal found 2/13$629
This Delta deal was found by Cheapflights users on 2/12. 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 4/237:18 amSEA - KEF
1 stop19h 12mDelta
Fri 5/911:25 amKEF - SEA
1 stop18h 00mDelta
Deal found 2/12$630
This Expedia deal was found by Cheapflights users on 2/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:50 pmSEA - KEF
1 stop22h 20mLufthansa
Mon 5/1912:25 amKEF - SEA
1 stop18h 30mLufthansa
Deal found 2/13$637
This StudentUniverse deal was found by Cheapflights users on 2/13. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/155:40 pmSEA - KEF
1 stop15h 50mFinnair
Tue 5/205:15 pmKEF - SEA
1 stop29h 45mFinnair
Deal found 2/13$657
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/42:05 pmSEA - KEF
1 stop11h 10mWestJet
Mon 6/99:35 amKEF - SEA
1 stop10h 33mWestJet
Deal found 2/13$664
This Air France deal was found by Cheapflights users on 2/13. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/229:55 amSEA - KEF
2 stops16h 35mAir France
Sun 4/2711:25 amKEF - SEA
1 stop15h 38mAir France
Deal found 2/13$682
This United deal was found by Cheapflights users on 2/13. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1311:50 pmSEA - KEF
2 stops24h 10mUnited Airlines
Sun 9/2112:00 pmKEF - SEA
2 stops34h 54mUnited Airlines
Deal found 2/13$688
This Flighttix deal was found by Cheapflights users on 2/13. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/306:00 amSEA - KEF
2 stops20h 30mVirgin Atlantic
Sun 4/611:25 amKEF - SEA
1 stop18h 09mVirgin Atlantic
Deal found 2/13$795

Find flights from Seattle to Keflavik Intl within your budget

Customize your flight search to find flights from Seattle to Keflavik Intl 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 February 13, 2025.

Fly from

Seattle

Fly to

Keflavik Intl

Route

Depart

Return

Price

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 5/14

8:20 pm-9:40 am

1 stop30h 20m

Reykjavik Keflavik Intl

Mon 5/19

10:45 am-11:10 am

1 stop31h 25m

$623

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 4/17

12:30 pm-4:55 am

3 stops33h 25m

Reykjavik Keflavik Intl

Mon 4/21

3:50 pm-8:01 pm

3 stops35h 11m

$625

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 4/23

11:24 am-9:30 am

1 stop15h 06m

Reykjavik Keflavik Intl

Thu 5/8

11:25 am-10:25 pm

1 stop18h 00m

$630

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 5/7

6:50 pm-12:10 am

1 stop22h 20m

Reykjavik Keflavik Intl

Mon 5/19

12:25 am-11:55 am

1 stop18h 30m

$637

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Wed 5/14

7:00 pm-9:25 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Fri 5/23

10:30 am-11:25 am

Nonstop7h 55m

$654

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 5/1

1:35 pm-4:30 pm

2 stops19h 55m

Reykjavik Keflavik Intl

Tue 5/6

5:15 pm-4:00 pm

1 stop29h 45m

$673

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Tue 4/22

9:55 am-9:30 am

2 stops16h 35m

Reykjavik Keflavik Intl

Sun 4/27

11:25 am-8:03 pm

1 stop15h 38m

$682

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 2/20

12:37 pm-1:20 pm

2 stops40h 43m

Reykjavik Keflavik Intl

Wed 3/5

2:15 pm-10:53 pm

2 stops40h 38m

$758

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Sun 3/30

6:00 am-9:30 am

2 stops20h 30m

Reykjavik Keflavik Intl

Sun 4/6

11:25 am-10:34 pm

1 stop18h 09m

$795

SeattleReykjavik

SEA - KEF

SEAKEF

Seattle/Tacoma Intl

Thu 3/13

7:50 pm-5:35 pm

1 stop14h 45m

Reykjavik Keflavik Intl

Thu 3/20

11:40 am-12:20 pm

1 stop31h 40m

$849

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

Showing 1-10 of 15 results
1
2

Compare providers for flights from Seattle to Keflavik Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Keflavik Intl in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Reykjavik Keflavik Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Reykjavik Keflavik Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl 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.

Travel insights for flights from Seattle to Keflavik Intl

Get recent, data-driven insights about flights from Seattle to Keflavik Intl including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Seattle to Reykjavik Keflavik Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Keflavik Intl. Price data was last updated on February 7, 2025.

The price you pay for your flight from Seattle to Reykjavik Keflavik Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Reykjavik Keflavik Intl Airport?

Currently, November is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of $328). Flying from Seattle to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $660). 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 KEF?

Find hourly flight availability from Seattle to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 13, 2025.

One of the essential ways to save on airfare from Seattle to Reykjavik Keflavik Intl Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 32% on airfare.

What is the cheapest day to fly from Seattle to Reykjavik Keflavik Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Keflavik Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Reykjavik Keflavik Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Reykjavik Keflavik Intl Airport

Explore weekly flight availability from Seattle to Keflavik Intl. 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 February 13, 2025.

The most flights from SEA to KEF are scheduled on a Monday (2 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Reykjavik Keflavik Intl Airport ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 1.6 in.

Temperature in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Reykjavik Keflavik Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 51.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. 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 Keflavik Intl. Reviews last updated February 13, 2025.
Get a feel of what it's like to fly with Delta, Finnair and SWISS from Seattle to Reykjavik by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

8.0
Very good
8.0
Very good

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20