OSL - SEA

£323 Find Cheap Flights from Oslo to Seattle – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£461
Typical prices: £445-£664
British Airways
Sun 9/12Thu 13/12
OSL - SEA • 1 stop
Cheapest one-way flight
£323
Typical prices: £366-£664
KLM
Fri 16/2
OSL - SEA • 1 stop
Direct flights
Not available
There are currently no direct flights between Oslo Gardermoen Airport and Seattle. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
20 weeks
in advance
Our data shows that travellers who book at least 20 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 28% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Helsinki-Vantaa (HEL)
Cheapest • Avg £490 (return)
Reykjavik Keflavik Intl (KEF)
Shortest trip • 12h 54m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Oslo to Seattle (OSL-SEA)

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

Recent return flight deals from Oslo to Seattle

Wed, 9 Dec - Sun, 13 Dec
British Airways Logo
06:50 - 16:50OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
19h 00m1 stop London Heathrow
British Airways Logo
06:20 - 11:00SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
43h 40m2 stops Chicago O'Hare Intl London Heathrow
£461British Airways
Wed, 9 Dec - Sun, 13 Dec
British Airways Logo
06:50 - 16:50OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
19h 00m1 stop London Heathrow
British Airways Logo
06:20 - 11:00SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
43h 40m2 stops Chicago O'Hare Intl London Heathrow
£462British Airways
Thu, 5 Nov - Wed, 18 Nov
Multiple Airlines Logo
08:40 - 23:42OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
24h 02m2 stops Helsinki-Vantaa Dallas/Fort Worth
Multiple Airlines Logo
05:10 - 16:35SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
26h 25m2 stops Dallas/Fort Worth Helsinki-Vantaa
£464Multiple Airlines
Wed, 9 Dec - Sun, 13 Dec
British Airways Logo
06:50 - 00:47OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
26h 57m2 stops London Heathrow Chicago O'Hare Intl
British Airways Logo
10:51 - 22:40SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
26h 49m2 stops Chicago O'Hare Intl London Heathrow
£465British Airways
Tue, 10 Nov - Tue, 1 Dec
Multiple Airlines Logo
11:50 - 09:39OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
30h 49m2 stops London Heathrow Chicago O'Hare Intl
Multiple Airlines Logo
14:13 - 22:40SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
23h 27m2 stops Dallas/Fort Worth London Heathrow
£466Multiple Airlines
Tue, 27 Oct - Tue, 3 Nov
British Airways Logo
07:20 - 21:57OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
22h 37m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
07:30 - 14:10SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
21h 40m2 stops Dallas/Fort Worth London Heathrow
£467British Airways
Tue, 24 Nov - Tue, 1 Dec
British Airways Logo
16:55 - 16:59OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
33h 04m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
14:13 - 22:40SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
23h 27m2 stops Dallas/Fort Worth London Heathrow
£468British Airways
Wed, 9 Dec - Sun, 13 Dec
Icelandair Logo
13:10 - 17:00OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 11:35SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
12h 00m1 stop Reykjavik Keflavik Intl
£472Icelandair
Wed, 9 Dec - Sun, 13 Dec
Icelandair Logo
13:10 - 17:00OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
12h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 11:35SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
12h 00m1 stop Reykjavik Keflavik Intl
£473Icelandair
Thu, 5 Nov - Wed, 18 Nov
Multiple Airlines Logo
08:40 - 23:42OSL  Oslo Gardermoen-SEA Seattle/Tacoma Intl
24h 02m2 stops Helsinki-Vantaa Dallas/Fort Worth
Multiple Airlines Logo
05:10 - 16:35SEA  Seattle/Tacoma Intl-OSL Oslo Gardermoen
26h 25m2 stops Dallas/Fort Worth Helsinki-Vantaa
£476Multiple Airlines
Booking Insights

Price, demand, and travel trends for Oslo Gardermoen Airport to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from Oslo Gardermoen Airport to Seattle?

Return flights from Oslo Gardermoen Airport to Seattle typically range from £445 to £664. The lowest price found in the past 5 days was £461 on British Airways.

What's the cheapest day of the week to fly from Oslo Gardermoen Airport to Seattle?

Based on deals KAYAK users found in the last 12 months, Friday is the cheapest day of the week to fly from Oslo Gardermoen Airport to Seattle. It’s 8% cheaper than the average day, while Thursday is the most expensive, with prices 10% higher.

What is the cheapest month to fly from Oslo Gardermoen Airport to Seattle?

•February is the cheapest month to fly from Oslo Gardermoen Airport to Seattle at £384 return.
•December (£665) and June (£612) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 73% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Oslo Gardermoen Airport to Seattle the cheapest?

Flights from Oslo Gardermoen Airport to Seattle are cheapest 20 weeks before departure. Booking in this window typically costs about 27% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Oslo Gardermoen Airport to Seattle flights

Low season

January

Cheapest flight

£323
Beat the crowds with an average 43% drop in traveller numbers.
The most popular month to fly with an average 107% increase in traveller numbers.
One-way flight from Oslo Gardermoen Airport to Seattle

When to book flights from Oslo to Seattle

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

Your Oslo Gardermoen Airport to Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from Oslo Gardermoen Airport to Seattle?

    Only Economy class is available on flights from Oslo Gardermoen Airport to Seattle.

  • How long is a flight from Oslo Gardermoen Airport to Seattle?

    A direct flight from Oslo Gardermoen Airport to Seattle takes 00m, covering 4,551 miles.

  • Do I need a passport to fly from Oslo Gardermoen Airport to Seattle?

    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 Oslo Gardermoen Airport to Seattle flight?

    Return flights from Oslo Gardermoen Airport to Seattle range from £445 to £664, with an average of £536 over the past 12 months. Anything below £445 counts as a good deal.

  • How expensive are last-minute Oslo Gardermoen Airport to Seattle flights?

    Last-minute fares on this route (booked within two weeks of departure) run 17% above the £536 route average. Book 20 weeks before departure for the lowest fares.

  • How are flight prices from Oslo Gardermoen Airport to Seattle looking right now?

    One-way fares from Oslo Gardermoen Airport to Seattle are currently higher than usual. Average one-way flight prices are about £593, which is 25% above the typical average for this route.

  • Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates starting from around £3 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

  • Which airports can I use when flying from Oslo Gardermoen Airport to Seattle?

    Flights from Oslo Gardermoen Airport to Seattle usually depart from Oslo Gardermoen (OSL) and arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Oslo Gardermoen Airport to Seattle pass through?

    One-stop flights from Oslo Gardermoen Airport to Seattle most commonly connect through:

    • Reykjavik Keflavik Intl (KEF) – 53% of one-stop connections
    • Amsterdam Schiphol (AMS) – 13% of one-stop connections
    • Kastrup Copenhagen (CPH) – 12% of one-stop connections
    • Munich Franz Josef Strauss (MUC) – 8% of one-stop connections

  • Can I save money by using flexible dates for flights from Oslo Gardermoen Airport to Seattle?

    Yes. Flexible dates can save you up to 17% on flights from Oslo Gardermoen Airport to Seattle. Friday is the cheapest departure day at £493 return on average, while Thursday is the most expensive at £591, a difference of £97.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different stopover airport from Oslo Gardermoen Airport to Seattle?

    Flying via Reykjavik Keflavik Intl (KEF) gives the shortest average 1-stop total travel time of 12h 54m, compared to 13h 13m via Kastrup Copenhagen (CPH) and 14h 31m via Helsinki-Vantaa (HEL).

  • What is the time difference between Oslo Gardermoen Airport and Seattle?

    Seattle is 9 hours behind Oslo Gardermoen Airport (Pacific Time vs Central European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are The Westin Seattle, Seattle Center, and Seattle Marriott Waterfront. These are among the most viewed places in Seattle on KAYAK.

Your guide to booking Oslo Gardermoen Airport to Seattle 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 Friday departure and avoid flying on Thursday. On this route, Friday flights average £493, about £97 less than Thursday fares (16% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 20 weeks before you fly. On this route, that window historically saves about 27% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Oslo Gardermoen Airport to Seattle trip for February. Fares historically average £384 return in that month – typically £281 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Oslo to Seattle

Complete your trip to Seattle with a hotel stay or car hire

Car hire in Seattle
Hotels in Seattle
Holidays in Seattle