SEA - KEF

$302 Find Cheap Flights from Seattle to Reykjavik - Compare and Save

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Everything you should know

Cheapest round-trip
$546
Typical prices: $547-$819
Icelandair
Tue 9/25Mon 10/1
SEA - KEF • Non-stop
Cheapest one-way
$302
Typical prices: $471-$664
WestJet
Wed 9/19
SEA - KEF • 1 stop
Nonstop flights
Every day
You can fly direct with Icelandair and Alaska Airlines. Average duration is 7h 32m
Direct flights
+1
Direct flights
+1
When to book
9 weeks
in advance
Our data shows that travelers 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 $515 (round-trip)
Calgary (YYC)
Shortest trip • 10h 51m (one-way)
Insights
Insights
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We hope you love your trip to Reykjavik Keflavik Intl Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Reykjavik (SEA-KEF)

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

Recent round-trip flight deals from Seattle to Reykjavik

Fri, Sep 25 - Thu, Oct 1
Icelandair Logo
3:40 pm - 6:15 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 35mnonstop
Icelandair Logo
7:45 pm - 8:40 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
7h 55mnonstop
$546Icelandair
Thu, Sep 24 - Thu, Oct 1
Icelandair Logo
7:00 pm - 9:25 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 25mnonstop
Icelandair Logo
7:45 pm - 8:40 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
7h 55mnonstop
$553Icelandair
Fri, Oct 9 - Fri, Oct 16
Icelandair Logo
3:40 pm - 6:15 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 35mnonstop
Icelandair Logo
7:45 pm - 8:40 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
7h 55mnonstop
$556Icelandair
Sun, Oct 18 - Tue, Oct 27
Icelandair Logo
3:40 pm - 6:15 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 35mnonstop
Icelandair Logo
5:00 pm - 6:00 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 00mnonstop
$561Icelandair
Fri, Sep 25 - Thu, Oct 1
Multiple Airlines Logo
6:00 am - 7:00 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
18h 00m1 stop Minneapolis St Paul
Multiple Airlines Logo
9:30 am - 8:36 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
18h 06m1 stop Minneapolis St Paul
$582Multiple Airlines
Thu, Sep 24 - Thu, Oct 1
Delta Logo
5:59 pm - 7:00 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
30h 01m1 stop Minneapolis St Paul
Delta Logo
9:30 am - 4:45 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
14h 15m1 stop Minneapolis St Paul
$606Delta
Thu, Sep 24 - Thu, Oct 1
Multiple Airlines Logo
5:59 pm - 7:00 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
30h 01m1 stop Minneapolis St Paul
Multiple Airlines Logo
9:30 am - 4:45 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
14h 15m1 stop Minneapolis St Paul
$606Multiple Airlines
Mon, Sep 7 - Mon, Sep 14
Alaska Airlines Logo
6:35 pm - 9:00 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 25mnonstop
Alaska Airlines Logo
4:50 pm - 5:55 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 05mnonstop
$766Alaska Airlines
Mon, Sep 7 - Thu, Sep 10
Alaska Airlines Logo
6:35 pm - 9:00 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 25mnonstop
Alaska Airlines Logo
10:40 am - 11:45 amKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 05mnonstop
$766Alaska Airlines
Sun, Sep 6 - Mon, Sep 14
Alaska Airlines Logo
6:35 pm - 9:00 amSEA  Seattle/Tacoma Intl-KEF Reykjavik Keflavik Intl
7h 25mnonstop
Alaska Airlines Logo
4:50 pm - 5:55 pmKEF  Reykjavik Keflavik Intl-SEA Seattle/Tacoma Intl
8h 05mnonstop
$766Alaska Airlines
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 $546. Prices are below average for this route right now, with typical round-trip fares ranging from $547 to $819. The lowest price found in the past 5 days was $546 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, it 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 $564 round-trip.
  • December ($850) and August ($829) 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

$302
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Seattle to Reykjavik Keflavik Intl Airport

When to book flights from Seattle to Reykjavik

Are your dates flexible? Find out the best times to travel from Seattle to Reykjavik 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.

  • 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.

  • What airlines are available from Seattle to Reykjavik Keflavik Intl Airport?

    2 airlines operate flights between Seattle and Reykjavik Keflavik Intl Airport. The airlines offering nonstop flights on this route include:

    • Icelandair
    • Alaska Airlines

  • 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 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 cabin bag and a checked bag in Economy Class
    • Alaska Airlines: a cabin bag and a checked bag in Economy Class

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

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

    Four cabin classes are available on flights from Seattle to Reykjavik Keflavik Intl Airport:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • 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 nonstop options on average. Layover fares average $515 round-trip via New York John F Kennedy Intl (JFK), compared to $661 for nonstop.

  • 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 $69–$100 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 787-10 Dreamliner variants.

  • 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) - 50% of one-stop connections
    • Calgary (YYC) - 33% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 17% 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 $613 round-trip on average, while Sunday is the most expensive at $710, a difference of $97. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • 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 50% of flights leaving in that window. Evening departures account for 50%, morning flights for 0%, and night flights for 0%.

  • What popular places can I visit in Reykjavik Keflavik Intl Airport?

    Some of the most popular sights in Reykjavik Keflavik Intl Airport are Hallgrímskirkja, Reykjavik City Centre and Harpa. These are among the most viewed places in Reykjavik Keflavik Intl Airport on KAYAK.

  • 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 10:07 pm
    • Latest: departs at 11:25 pm and lands at 6:57 am.

    The flight takes about 7h 32m.

  • 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 $666. Book 9 weeks before departure for the lowest fares.

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

    A nonstop flight from Seattle to Reykjavik Keflavik Intl Airport takes 7h 32m, covering 3,608 miles.

  • 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 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 lower than usual. Average one-way flight prices are about $424, which is 19% below the typical average for this route.

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

    Flying via Calgary (YYC) gives the shortest average 1-stop total travel time at 10h 51m, compared with 18h 08m via New York John F Kennedy Intl (JFK) and 21h 27m via Detroit Metropolitan Wayne County (DTW).

  • 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.

  • 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 $16 for economy cars. Top options include:
    · Ice Rental 4x4
    · Fair Car
    · Budget
    · Europcar
    · Alamo

  • 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 $547 to $819, with an average of $666 over the past 12 months. Anything below $547 counts as a good deal.

  • 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.

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 can be flexible, aim for a Wednesday departure instead of Sunday. On this route, Wednesday flights average $613 - about $97 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 $564 round-trip in that month - typically $286 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 $515 round-trip on this route - about $146 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

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Tuesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Wednesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Thursday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Friday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Saturday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Sunday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

See more direct flights

Direct returns

Reykjavik Keflavik Intl to Seattle/Tacoma Intl

Monday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Tuesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Wednesday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Thursday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Friday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Saturday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

Sunday

Alaska Airlines,Icelandair

Alaska Airlines,Icelandair

See more direct flights

Everything you need to know for your flight from Seattle to Reykjavik

Information on your arrival and departure airports

Seattle (SEA)
Keflavik Intl (KEF)