SEA - KEF

C$ 631 Find Cheap Flights from Seattle to Reykjavik – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 631
Typical prices: C$ 771-C$ 1,154
Icelandair
Tue 23/1Thu 8/2
SEA - KEF • Direct
Cheapest one-way flights
C$ 776
Typical prices: C$ 663-C$ 935
United Airlines
Thu 1/11
SEA - KEF • 1 stop
Direct flights
Every day
You can fly direct with Icelandair. Average duration is 7h 35m
Direct flights
+1
Direct flights
+1
When to book
9 weeks
in advance
Our data shows that travellers who book at least 9 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
When to travel
May
Cheapest • 15% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
New York John F Kennedy Intl (JFK)
Cheapest • Avg C$ 747 (round-trip)
Calgary (YYC)
Shortest trip • 12h 07m (one-way)
Insights
Insights
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to Reykjavik Keflavik Intl Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Keflavik Intl (SEA-KEF)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Keflavik Intl

Sat, 23 Jan - Sun, 7 Feb
Icelandair Logo
2:35 p.m. - 6:15 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 40mdirect
Icelandair Logo
5:00 p.m. - 5:00 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 00mdirect
C$ 631Icelandair
Thu, 10 Dec - Fri, 18 Dec
Icelandair Logo
2:35 p.m. - 6:15 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 40mdirect
Icelandair Logo
5:00 p.m. - 5:00 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 00mdirect
C$ 845Icelandair
Sat, 17 Oct - Sat, 24 Oct
KLM Logo
11:50 a.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
14h 40m1 stop New York John F Kennedy Intl
KLM Logo
11:25 a.m. - 11:04 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 39m1 stop New York John F Kennedy Intl
C$ 866KLM
Sat, 17 Oct - Sat, 24 Oct
Virgin Atlantic Logo
6:00 a.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
20h 30m2 stops Detroit Metropolitan Wayne County New York John F Kennedy Intl
Virgin Atlantic Logo
11:25 a.m. - 11:04 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 39m1 stop New York John F Kennedy Intl
C$ 874Virgin Atlantic
Fri, 16 Oct - Sat, 24 Oct
Delta Logo
10:59 p.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
27h 31m1 stop New York John F Kennedy Intl
Delta Logo
11:25 a.m. - 11:04 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 39m1 stop New York John F Kennedy Intl
C$ 881Delta
Tue, 20 Oct - Fri, 23 Oct
KLM Logo
7:15 a.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
19h 15m1 stop New York John F Kennedy Intl
KLM Logo
11:25 a.m. - 11:04 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 39m1 stop New York John F Kennedy Intl
C$ 996KLM
Fri, 12 Feb - Thu, 18 Feb
Icelandair Logo
2:35 p.m. - 6:15 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 40mdirect
Icelandair Logo
5:00 p.m. - 5:00 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 00mdirect
C$ 1,005Icelandair
Thu, 15 Oct - Sat, 24 Oct
Delta Logo
9:35 p.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
28h 55m2 stops Los Angeles New York John F Kennedy Intl
Delta Logo
11:25 a.m. - 11:04 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 39m1 stop New York John F Kennedy Intl
C$ 1,014Delta
Mon, 19 Oct - Sat, 24 Oct
Delta Logo
11:50 a.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
14h 40m1 stop New York John F Kennedy Intl
Delta Logo
11:25 a.m. - 11:04 p.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 39m1 stop New York John F Kennedy Intl
C$ 1,024Delta
Sun, 11 Oct - Tue, 20 Oct
Delta Logo
11:59 p.m. - 9:30 a.m.SEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
26h 31m2 stops Atlanta Hartsfield-Jackson New York LaGuardia
Delta Logo
11:25 a.m. - 10:03 a.m.KEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
29h 38m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson
C$ 1,030Delta
Booking Insights

Price, demand, and travel trends for Seattle to Reykjavik Keflavik Intl Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Seattle to Reykjavik Keflavik Intl Airport with more confidence.

How much is a round-trip flight from Seattle to Reykjavik Keflavik Intl Airport?

Round-trip flights from Seattle to Reykjavik Keflavik Intl Airport start at C$ 631. Prices are below average for this route right now, with typical round-trip fares ranging from C$ 771 to C$ 1,154. The lowest price found in the past 5 days was C$ 631 on Icelandair.

What's the cheapest day of the week to fly from Seattle to Reykjavik Keflavik Intl Airport?

Wednesday is the cheapest day of the week to fly from Seattle to Reykjavik Keflavik Intl Airport and is 8% cheaper than the average day. Sunday is the most expensive day with flight prices 6% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

•May is the cheapest month to fly from Seattle to Reykjavik Keflavik Intl Airport at C$ 795 round-trip.
•December (C$ 1,198) and August (C$ 1,168) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Seattle to Reykjavik Keflavik Intl Airport the cheapest?

Flights from Seattle to Reykjavik Keflavik Intl Airport are cheapest 9 weeks before departure. Booking in this window typically costs about 20% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Seattle to Reykjavik Keflavik Intl Airport flights

Low season

January

Cheapest flight

C$ 631
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (3% more expensive on average)
Flights from Seattle to Reykjavik Keflavik Intl Airport

When to book flights from Seattle to Keflavik Intl

Are your dates flexible? Find out the best times to travel from Seattle to Keflavik Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to Reykjavik Keflavik Intl Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • What are the earliest and latest flights from Seattle to Reykjavik Keflavik Intl Airport?

    These are the earliest and latest flight times available from Seattle to Reykjavik Keflavik Intl Airport:

    • Earliest: departs at 2:35 pm and lands at 10:10 pm
    • Latest: departs at 7:10 pm and lands at 2:45 am.

    The flight takes about 7h 35m.

  • Which cabin classes can I book on flights from Seattle to Reykjavik Keflavik Intl Airport?

    Only Economy Class is available on flights from Seattle to Reykjavik Keflavik Intl Airport.

  • How long does a flight from Seattle to Reykjavik Keflavik Intl Airport take?

    A direct flight from Seattle to Reykjavik Keflavik Intl Airport takes 7h 35m, covering 9,346 km.

  • Do I need a passport to fly from Seattle to Reykjavik Keflavik Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Seattle to Reykjavik Keflavik Intl Airport flight?

    Round-trip flights from Seattle to Reykjavik Keflavik Intl Airport range from C$ 771 to C$ 1,154, with an average of C$ 939 over the past 12 months. Anything below C$ 771 counts as a good deal.

  • How expensive are last-minute Seattle to Reykjavik Keflavik Intl Airport flights?

    Last-minute fares on this route – booked within 2 weeks of departure – run 0% above the route average of C$ 939. Book 9 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Seattle to Reykjavik Keflavik Intl Airport?

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 747 round-trip via New York John F Kennedy Intl (JFK), compared to C$ 931 for direct.

  • What is the standard checked bag allowance on flights from Seattle to Reykjavik Keflavik Intl Airport?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 141–C$ 141 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Seattle to Reykjavik Keflavik Intl Airport?

    The Airbus A330-900neo family is used most often on this route, operated mainly by Virgin Atlantic and KLM. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

  • How are flight departures from Seattle to Reykjavik Keflavik Intl Airport spread across the day?

    Afternoon is the busiest departure period on Seattle to Reykjavik Keflavik Intl Airport flights, with 100% leaving in that window. Morning departures account for 0%, Evening flights for 0%, and Night flights for 0%.

  • Which airlines offer Wi-Fi on Seattle to Reykjavik Keflavik Intl Airport flights?

    Alaska Airlines is the only airline on the Seattle to Reykjavik Keflavik Intl Airport route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Seattle to Reykjavik Keflavik Intl Airport looking right now?

    One-way fares from Seattle to Reykjavik Keflavik Intl Airport are currently higher than usual. Average one-way flight prices are about C$ 847, which is 14% above the typical average for this route.

  • What car rental options are available at Reykjavik Keflavik Intl Airport (KEF)?

    Reykjavik Keflavik Intl Airport (KEF) hosts 5 major car rental companies, with daily rates starting from around C$ 22 for economy cars. Top options include:
    • Ice Rental 4x4
    • Fair Car
    • Budget
    • Europcar
    • Alamo

  • Which airports can I use when flying from Seattle to Reykjavik Keflavik Intl Airport?

    Flights from Seattle to Reykjavik Keflavik Intl Airport usually depart from Seattle/Tacoma Intl (SEA) and arrive at Reykjavik Keflavik Intl (KEF).

  • Which airports do connecting flights from Seattle to Reykjavik Keflavik Intl Airport pass through?

    One-stop flights from Seattle to Reykjavik Keflavik Intl Airport most commonly connect through:

    • New York John F Kennedy Intl (JFK) – 19% of one-stop connections
    • Boston Logan Intl (BOS) – 14% of one-stop connections
    • Minneapolis St Paul (MSP) – 14% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 14% of one-stop connections

    New York John F Kennedy Intl (JFK) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Seattle to Reykjavik Keflavik Intl Airport?

    Yes. Being flexible with your travel dates can save you up to 14% on the Seattle to Reykjavik Keflavik Intl Airport route. Wednesday is the cheapest departure day at C$ 864 round-trip on average, while Sunday is the most expensive at C$ 1,000, a difference of C$ 137. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines are available on the route from Seattle to Reykjavik Keflavik Intl Airport?

    Only Icelandair operates flights between Seattle and Reykjavik Keflavik Intl Airport.

  • How much time can I save by choosing a different layover airport when travelling from Seattle to Reykjavik Keflavik Intl Airport?

    Flying via Calgary (YYC) gives the shortest average 1-stop total travel time at 12h 07m, compared with 13h 02m via Chicago O'Hare Intl (ORD) and 16h 15m via Minneapolis St Paul (MSP).

  • What is the time difference between Seattle and Reykjavik Keflavik Intl Airport?

    Reykjavik Keflavik Intl Airport is 7 hours ahead of Seattle (Greenwich Mean Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which airlines offer extra legroom and free seat selection on Seattle to Reykjavik Keflavik Intl Airport flights?

    Among airlines operating Seattle to Reykjavik Keflavik Intl Airport flights:

    • Icelandair: offers extra legroom; offers free seat selection
    • Alaska Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Seattle to Reykjavik Keflavik Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Icelandair: a carry-on bag and a checked bag in Economy Class
    • Alaska Airlines: a carry-on bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route, and airline, so travellers should check the fare details before booking.

Your guide to booking Seattle to Reykjavik Keflavik Intl Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure instead of Sunday. On this route, Wednesday flights average C$ 864 – about C$ 137 less than Sunday (14% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 9 weeks before you fly. On this route, that window historically saves about 20% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Reykjavik Keflavik Intl Airport trip for May. Fares historically average C$ 795 round-trip in that month – typically C$ 403 less than the most expensive month, which is December (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through New York John F Kennedy Intl Airport (JFK) can be cheaper than flying direct. The cheapest layover option averages C$ 747 round-trip on this route – about C$ 184 less than direct flights (based on the last 12 months).

Prefer to fly direct from Seattle to Reykjavik?

 
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Reykjavik Keflavik Intl Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Reykjavik Keflavik Intl

Monday

Icelandair

Icelandair

Tuesday

Icelandair

Icelandair

Wednesday

Icelandair

Icelandair

Thursday

Icelandair

Icelandair

Friday

Icelandair

Icelandair

Saturday

Icelandair

Icelandair

Sunday

Icelandair

Icelandair

See more nonstop flights

Direct returns

Reykjavik Keflavik Intl to Seattle/Tacoma Intl

Monday

Icelandair

Icelandair

Tuesday

Icelandair

Icelandair

Wednesday

Icelandair

Icelandair

Thursday

Icelandair

Icelandair

Friday

Icelandair

Icelandair

Saturday

Icelandair

Icelandair

Sunday

Icelandair

Icelandair

See more nonstop flights

More options for your flight from Seattle to Keflavik Intl

Complete your trip to Reykjavik with a hotel stay or car rental

Car rentals in Reykjavik
Hotels in Reykjavik
Vacations in Reykjavik