SEA - OSL

C$ 319 Find Cheap Flights from Seattle to Oslo

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 12/5. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Oslo Gardermoen Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Oslo, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Oslo, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
C$ 634
Typical prices: C$ 680-C$ 850
Delta
dg. 29/3dj. 9/4
SEA - OSL • 2 stops
Cheapest one-way flights
C$ 319
Typical prices: C$ 565-C$ 755
Delta
dt. 12/5
SEA - OSL • 2 stops
Top airlines
Delta
Cheapest • from C$ 634 (round-trip)
KLM
Best reviews • 7.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 28% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
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

dg., 29 març - dj., 9 abr.
Delta Logo
10:58 p.m. - 9:15 a.m.
SEA
-
OSL
25h 17m
2 stops
Delta Logo
6:30 a.m. - 5:38 p.m.
OSL
-
SEA
20h 08m
1 stop
C$ 634Delta
dg., 29 març - dg., 5 abr.
Delta Logo
10:58 p.m. - 9:15 a.m.
SEA
-
OSL
25h 17m
2 stops
Delta Logo
11:50 a.m. - 11:45 a.m.
OSL
-
SEA
32h 55m
1 stop
C$ 635Delta
dc., 25 febr. - dl., 9 març
Delta Logo
2:15 p.m. - 9:30 p.m.
SEA
-
OSL
22h 15m
1 stop
Delta Logo
9:25 a.m. - 11:55 p.m.
OSL
-
SEA
22h 30m
2 stops
C$ 641Delta
dc., 25 febr. - dl., 9 març
Delta Logo
2:15 p.m. - 9:30 p.m.
SEA
-
OSL
22h 15m
1 stop
Delta Logo
7:45 a.m. - 10:05 p.m.
OSL
-
SEA
22h 20m
2 stops
C$ 642Delta
dt., 31 març - dl., 6 abr.
KLM Logo
5:30 p.m. - 8:55 p.m.
SEA
-
OSL
18h 25m
1 stop
KLM Logo
11:50 a.m. - 4:30 p.m.
OSL
-
SEA
13h 40m
1 stop
C$ 643KLM
dl., 11 maig - ds., 30 maig
Delta Logo
9:45 p.m. - 8:40 p.m.
SEA
-
OSL
13h 55m
1 stop
Delta Logo
1:15 p.m. - 8:11 p.m.
OSL
-
SEA
15h 56m
1 stop
C$ 645Delta
dg., 29 març - dl., 6 abr.
Delta Logo
5:30 p.m. - 6:35 p.m.
SEA
-
OSL
16h 05m
1 stop
Delta Logo
11:50 a.m. - 4:30 p.m.
OSL
-
SEA
13h 40m
1 stop
C$ 646Delta
dj., 19 febr. - dt., 3 març
KLM Logo
3:05 p.m. - 9:00 p.m.
SEA
-
OSL
20h 55m
1 stop
KLM Logo
4:25 p.m. - 11:35 a.m.
OSL
-
SEA
28h 10m
1 stop
C$ 648KLM
dt., 17 març - dt., 31 març
Delta Logo
11:45 a.m. - 2:45 p.m.
SEA
-
OSL
19h 00m
2 stops
Delta Logo
6:30 a.m. - 7:05 p.m.
OSL
-
SEA
21h 35m
2 stops
C$ 649Delta
dt., 31 març - dc., 8 abr.
Delta Logo
7:20 a.m. - 11:05 a.m.
SEA
-
OSL
18h 45m
2 stops
Delta Logo
6:30 a.m. - 5:38 p.m.
OSL
-
SEA
20h 08m
1 stop
C$ 650Delta
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 March.

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$ 573 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 1,148 and C$ 931 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 seasonNovember
Cheapest flightC$ 319
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly (16% 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 3 days, the lowest price for a flight from Seattle to Oslo Gardermoen Airport was C$ 319 for a one-way ticket and C$ 634 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 airline alliances offer flights from Seattle to Oslo?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Seattle and Oslo, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Oslo, KLM or Scandinavian Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Oslo are KLM and Scandinavian Airlines. With an average price for the route of C$ 585 and an overall rating of 7.7, KLM is the most popular choice. Scandinavian Airlines is also a great choice for the route, with an average price of C$ 751 and an overall rating of 7.3.

  • 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 4 airlines 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.
7.7
KLMOverall score based on 1443 reviews
7.3Food
8.4Crew
7.8Boarding
7.1Entertainment
7.6Comfort
Airline reviews

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

4.0 OkayShereen, Dec 2025
Read more KLM reviews

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Fantastic. The only thing - out of my six luggage one was lost in Copenhagen, however it was delivered Home 3 Days later so all great..

The crew was friendly, the flight was pleasant. Thank you for your service!

Our trip plan from Kayak stated we were flying SAS. That was not true. The first leg was a Delta flight. We wasted 25 minutes before finding out to check in with the correct airline. Then our SAS flight for the second leg arrived 25 minutes late, and our third leg flight with SAS closed the gate knowing the flight delay was SAS’s fault, and that this flight would only be backed up 5 minutes. The final kicker was that between Delta and SAS, they lost all our checked luggage.

Flight was completely full January 9th? I problem i had the stewardess was bumping into me constantly walking by? very annoying.. on Austrian air I dint have this issue at all...

Amazing! Everyone was so nice and the food was so good!!

Terrible customer service. The flight attendants were rude. We experienced significant turbulence for a large portion of the flight and there was very little check in from the flight deck. The space was extremely limited to the point where it felt like torture. Never again

I was surprised how good an American airline can be - I was really impressed.

Excellent service throughout. Airport process is quick and easy. Very courteous staff. Great service in the plane! Just outstanding punctuality and service overall!!

I have paid for extra legroom on my flight. My seat was broken and did not recline. The crew could not fix it and refused to provide me with another seat

Over all experience was good. However the connection time was too short at CPG. We missed our connecting flight to AMS as the passport control line was too long and by the time we got our passport control done it was too late I wish there were some SAS staff to help us out at the passport control center Though they put us in a KLM flight from CPG to AMS, That flight was also delayed by over two hours

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

Iceland air transfer was bad. They lost my luggage and I just received it 11/1

It was too cold in the plane my feet froze

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

This flight was on time but since I missed the connecting flight I didn’t get my seat upgraded I paid for

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

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

Information on your arrival and departure airports