SEA - OSL

C$ 427 Find Cheap Flights from Seattle to Oslo – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Oslo Gardermoen departing on 13/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 691
Typical prices: C$ 591-C$ 769
United Airlines
Mon 4/1Fri 2/4
SEA - OSL • 2 stops
Cheapest one-way flights
C$ 427
Typical prices: C$ 333-C$ 729
Icelandair
Sun 13/9
SEA - OSL • 1 stop
Top airlines
Cheapest • from C$ 691 (round-trip)
Best reviews • 7.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Direct flights
Not available
There are currently no direct flights between Seattle and Oslo Gardermoen. You’ll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg C$ 693 (round-trip)
Shortest trip • 11h 44m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
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Good to know
Good to know
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We hope you love your trip to Oslo Gardermoen!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Oslo Gardermoen (SEA-OSL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Oslo Gardermoen that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Oslo Gardermoen

Mon, 4 Jan - Fri, 2 Apr
United Airlines Logo
5:00 a.m. - 5:40 p.m.
SEA
-
OSL
27h 40m
2 stops
United Airlines Logo
11:45 a.m. - 4:59 p.m.
OSL
-
SEA
14h 14m
1 stop
C$ 691United Airlines
Wed, 14 Oct - Wed, 21 Oct
Icelandair Logo
7:00 p.m. - 12:35 p.m.
SEA
-
OSL
32h 35m
1 stop
Icelandair Logo
4:30 p.m. - 5:55 p.m.
OSL
-
SEA
34h 25m
1 stop
C$ 694Icelandair
Wed, 19 Aug - Wed, 26 Aug
United Airlines Logo
6:50 p.m. - 10:05 p.m.
SEA
-
OSL
18h 15m
1 stop
United Airlines Logo
6:35 a.m. - 11:55 a.m.
OSL
-
SEA
14h 20m
1 stop
C$ 695United Airlines
Wed, 19 Aug - Tue, 25 Aug
United Airlines Logo
6:50 p.m. - 5:55 p.m.
SEA
-
OSL
14h 05m
1 stop
United Airlines Logo
6:55 a.m. - 11:55 a.m.
OSL
-
SEA
14h 00m
1 stop
C$ 695United Airlines
Wed, 19 Aug - Tue, 25 Aug
United Airlines Logo
6:50 p.m. - 5:55 p.m.
SEA
-
OSL
14h 05m
1 stop
United Airlines Logo
6:55 a.m. - 6:32 p.m.
OSL
-
SEA
20h 37m
2 stops
C$ 695United Airlines
Tue, 29 Dec - Sun, 28 Mar
Icelandair Logo
2:35 p.m. - 11:35 a.m.
SEA
-
OSL
12h 00m
1 stop
Icelandair Logo
4:25 p.m. - 8:40 p.m.
OSL
-
SEA
13h 15m
1 stop
C$ 699Icelandair
Fri, 16 Oct - Fri, 23 Oct
United Airlines Logo
6:50 p.m. - 10:05 p.m.
SEA
-
OSL
18h 15m
1 stop
United Airlines Logo
7:15 a.m. - 4:59 p.m.
OSL
-
SEA
18h 44m
1 stop
C$ 699United Airlines
Sun, 16 Aug - Thu, 27 Aug
United Airlines Logo
6:50 p.m. - 10:05 p.m.
SEA
-
OSL
18h 15m
1 stop
United Airlines Logo
7:10 a.m. - 4:59 p.m.
OSL
-
SEA
18h 49m
1 stop
C$ 699United Airlines
Wed, 19 Aug - Thu, 27 Aug
United Airlines Logo
6:50 p.m. - 10:05 p.m.
SEA
-
OSL
18h 15m
1 stop
United Airlines Logo
7:10 a.m. - 4:59 p.m.
OSL
-
SEA
18h 49m
1 stop
C$ 699United Airlines
Sun, 13 Sep - Tue, 22 Sep
United Airlines Logo
6:50 p.m. - 10:05 p.m.
SEA
-
OSL
18h 15m
1 stop
United Airlines Logo
7:10 a.m. - 4:59 p.m.
OSL
-
SEA
18h 49m
1 stop
C$ 699United Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Oslo Gardermoen flights

Get data-powered insights and trends into flights from Seattle to Oslo Gardermoen to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Oslo Gardermoen Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Oslo Gardermoen Airport departing in January.

Flight prices are below average for this route right now.

Flights to Oslo Gardermoen Airport from Seattle usually cost between C$ 703 and C$ 933 in January.
The lowest price found in the past 5 days was C$ 691 on United Airlines (4 Jan–2 Apr).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Oslo Gardermoen Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Oslo Gardermoen Airport is January, where tickets cost C$ 591 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is C$ 958 and C$ 946 respectively.

How far in advance should I book a flight from Seattle to Oslo Gardermoen Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Oslo Gardermoen Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Oslo Gardermoen Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low season

November

Cheapest flight

C$ 427
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (17% more expensive on average)
Flight from Seattle to Oslo

When to book flights from Seattle to Oslo Gardermoen

Are your dates flexible? Find out the best times to travel from Seattle to Oslo Gardermoen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to Oslo flights

  • Why should I upgrade to a Business Class ticket for my flight from Seattle to Oslo Airport?

    There are several benefits to upgrading to Business Class on a journey from Seattle to Oslo Airport with an airline like British Airways or Emirates. Take advantage of more legroom, flat seats, and plentiful amenities. Gain access to premium lounges, enjoy fine food, and receive personalized attention. These changes improve your comfort, convenience, and overall traveling experience.

  • Which family-friendly airline can I consider for my flight from Seattle to Oslo Airport with the kids?

    Airlines like Lufthansa or Norwegian Air Shuttle are good options for family trips from Seattle to Oslo Airport. Both airlines pride themselves on being family-friendly, providing facilities and services to keep kids occupied. Families with young passengers can benefit from their help, kid-friendly meals, and in-flight entertainment selections. While Norwegian Air Shuttle has a special kids' entertainment area on its in-flight entertainment system, Lufthansa offers a program called "Flying Lab" that features educational games.

  • What are the public transportation options from Oslo Airport to the city center?

    You have various public transportation choices from Oslo Airport to the city center. Oslo Central Station is reached from the airport via the NSB regional rail and the Airport Express rail (Flytoget). Bus service to the city center is also available via the Airport Express Coach (Flybussen) and bus line 380.

  • Are airlines flying from Seattle to Oslo Airport suitable for passengers with limited mobility?

    Yes, American Airlines and Avianca are ideal for travelers with limited mobility from Seattle to Oslo Airport. To ensure a comfortable journey, they offer specialized help like wheelchair assistance, pre-boarding, and other services. Also, passengers can check any necessary mobility aids, such as wheelchairs or scooters. Passengers occasionally even qualify for a free supplementary seat for a caretaker.

  • What is the cheapest flight from Seattle to Oslo Gardermoen Airport?

    In the last 5 days, the lowest price for a flight from Seattle to Oslo Gardermoen Airport was C$ 427 for a one-way ticket and C$ 691 for a round-trip.

  • Which airports will I be using when flying from Seattle to Oslo?

    Seattle airport is called Seattle/Tacoma Intl and the only airport in Oslo is Oslo Gardermoen.

  • Which aircraft models fly most regularly from Seattle to Oslo?

    We unfortunately don’t have that data for this specific route.

  • Which is the best airline for flights from Seattle to Oslo, Icelandair or Lufthansa?

    The two airlines most popular with KAYAK users for flights from Seattle to Oslo are Icelandair and Lufthansa. With an average price for the route of C$ 687 and an overall rating of 7.0, Icelandair is the most popular choice. Lufthansa is also a great choice for the route, with an average price of C$ 704 and an overall rating of 6.8.

  • How does KAYAK find such low prices on flights from Seattle to Oslo?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Oslo.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Oslo?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Oslo from Seattle is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Oslo?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Oslo with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Oslo?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Oslo from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Oslo Gardermoen Airport

  • Seattle-Tacoma International Airport (SEA) serves Seattle, Washington, and Tacoma. SEA serves as a base for both Alaska Airlines and Delta Air Lines. It is located approximately 14 miles south of downtown Seattle.
  • The average carbon emissions per person on flights from Seattle to Oslo Airport stand at 8,794 lbs. However, you have the option to choose more environmentally friendly flights with Icelandair and Wideroe, as they offer breakouts that emit 33% less CO2 per person on this specific route.
  • Norwegian Air Shuttle and Lufthansa are renowned for having the most accommodating carry-on policies between Seattle and Oslo Airport (OSL). While Lufthansa offers reasonable size and weight restrictions for carry-on luggage, Norwegian Air Shuttle permits a higher carry-on weight allowance.
  • Unaccompanied minors between the ages of 5 and 11 are welcome to fly with Norwegian Air Shuttle from Seattle to Oslo Airport. They need the Unaccompanied Minor service to be purchased, the relevant paperwork to be filled out, and adherence to particular check-in and pick-up procedures.
  • For flights from Seattle to Oslo Airport, carriers, including Delta Air Lines and KLM, have accommodating pet policies. Depending on size and species, pets may fly with their owners in the cabin or as cargo on Delta Air Lines. Additionally, they offer specialized pet travel services. KLM provides pet transportation as cargo for larger animals and permits small dogs to travel in the cabin under certain conditions.

Reviews of the top airline flying from Seattle to Oslo Gardermoen

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Oslo. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Oslo Gardermoen? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
IcelandairOverall score based on 720 reviews
7.1Boarding
6.8Entertainment
8.0Crew
6.1Food
6.9Comfort
Airline reviews

The WiFi wasn’t working, so no one could watch any entertainment for 5 hours. The plane also was delayed and did not leave, nor did the staff prioritize those with connecting flights to de-board first. Everyone with a connecting flight to Munich missed their flight by 5 minutes. Then the next flight to Munich was 14 hours later. The airport could not compensate us because the closest hotel was about 2 hours away. This did not seem like the truth. I was not pleased with this traveling experience.

2.0 MediocreAnonymous, Aug 2026
BWI - KEF
Read more Icelandair reviews

The WiFi wasn’t working, so no one could watch any entertainment for 5 hours. The plane also was delayed and did not leave, nor did the staff prioritize those with connecting flights to de-board first. Everyone with a connecting flight to Munich missed their flight by 5 minutes. Then the next flight to Munich was 14 hours later. The airport could not compensate us because the closest hotel was about 2 hours away. This did not seem like the truth. I was not pleased with this traveling experience.

I DO NOT recommend Iceland air...missed connecting flight.....paid for isle seat upgrade for health reasons...had to do that over....baggage left in the rain so clothes got soaked other items ruined....called customer * dont care* service

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

Everything was good. Only issue comes from being vegan and flying. The food options are super limited.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

7 hours 15 min flight from SEA to Iceland with no inflight entertainment and no power to charge your own devices, also no meal service, not even any snacks/cookies. You have to buy food and the options are extremely limited (i.e. ham and cheese sandwich and spicy cup noodles). I didn't think Iceland air was a budget airline, maybe I was wrong, the cost of the ticket didn't feel like it though.

Very nice flight, easy connections in Keflavík, and friendly crew.

Everything you need to know for your flight from Seattle to Oslo Gardermoen

Information on your arrival and departure airports