Cheap flights from Seattle to Reykjavik Keflavik Intl Airport from C$ 453
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 29/7. Fares are subject to change and may not be available on all flights or dates of travel.
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 1 July 2025.
Round-trip from | C$ 556 |
---|---|
One-way from | C$ 453 |
Popular in | December |
Cheapest in | October |
Average price | C$ 982 |
Good round-trip deal | C$ 680 or less |
Good one-way deal | C$ 370 or less |
Find flight deals from Seattle to Keflavik Intl
Cheapest flights from Seattle to Keflavik IntlExplore 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 1 July 2025.
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 1 July 2025.
Cheapflights Fare Finder
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 629,999 searches. Data last updated 1 July 2025.
Use the filters below to find and compare flights from Seattle to Reykjavik Keflavik Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Mon 22/9
1:55 p.m.-8:30 a.m.
1 stop11h 35m
Reykjavik Keflavik Intl
Thu 2/10
9:50 a.m.-3:52 p.m.
2 stops37h 02m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Wed 6/8
11:30 p.m.-2:00 p.m.
Nonstop7h 30m
Reykjavik Keflavik Intl
Sun 17/8
10:30 a.m.-11:25 a.m.
Nonstop7h 55m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Sun 21/9
11:15 a.m.-9:30 a.m.
1 stop15h 15m
Reykjavik Keflavik Intl
Wed 1/10
11:25 a.m.-8:16 p.m.
1 stop15h 51m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Sat 16/8
11:55 p.m.-6:20 a.m.
2 stops23h 25m
Reykjavik Keflavik Intl
Wed 27/8
11:25 a.m.-8:14 p.m.
1 stop15h 49m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Sat 16/8
4:20 p.m.-11:55 p.m.
1 stop24h 35m
Reykjavik Keflavik Intl
Thu 4/9
9:10 a.m.-10:59 p.m.
2 stops44h 49m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Tue 29/7
11:40 p.m.-4:45 a.m.
1 stop22h 05m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Mon 14/7
7:35 p.m.-8:15 a.m.
1 stop29h 40m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Tue 26/8
7:20 a.m.-8:10 a.m.
1 stop17h 50m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Mon 10/11
7:00 a.m.-3:15 p.m.
2 stops24h 15m
SeattleReykjavik
SEA - KEF
SEAKEF
Seattle/Tacoma Intl
Tue 22/7
5:55 a.m.-6:20 a.m.
1 stop17h 25m
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.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Reykjavik Keflavik Intl Airport
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 27 June 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 47 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, January is the cheapest month in which you can book a flight from Seattle to Reykjavik Keflavik Intl Airport (average of C$ 268). Flying from Seattle to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of C$ 593). 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 1 July 2025.
It’s typically best to fly out from Seattle to Reykjavik Keflavik Intl Airport in the morning. Doing so could potentially save you 19% on the flight price compared to flying at noon, which is usually more expensive.
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 1 July 2025.
The most flights from SEA to KEF are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).
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 1 July 2025.
Check out reviews from past customers who have flown with Delta,KLM, andSWISS from Seattle to Reykjavik Keflavik Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Food
Overall
Comfort
Entertainment
Boarding
Reviews
Kim,May 2025
PIH - SLC
Crew
Food
Overall
Comfort
Entertainment
Boarding
Reviews
Kim,May 2025
PIH - SLC
Crew
Food
Overall
Comfort
Entertainment
Boarding
Reviews
Kim,May 2025
PIH - SLC
Crew
Food
Overall
Comfort
Entertainment
Boarding
Reviews
Kim,May 2025
PIH - SLC
Crew
Food
Overall
Comfort
Entertainment
Boarding
Reviews
Kim,May 2025
PIH - SLC
Crew
Food
Overall
Comfort
Entertainment
Boarding
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from Seattle to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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