$400 Find Cheap Flights from Oslo to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Oslo to Seattle departing on 9/23. 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 Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Oslo to Seattle, 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 Oslo to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$649
Typical prices: $799-$578
Scandinavian Airlines
Thu 8/13Tue 8/25
OSL - SEA • 1 stop
Cheapest one-way
$400
Typical prices: $471-$565
American Airlines
Wed 9/23
OSL - SEA • 2 stops
Top airlines
Cheapest • from $649 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 25% compared to booking last minute.
Insights
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We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Oslo to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Oslo to Seattle 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 Oslo to Seattle

Thu, Aug 13 - Tue, Aug 25
Scandinavian Airlines Logo
9:00 pm - 1:45 pm
OSL
-
SEA
25h 45m
1 stop
Scandinavian Airlines Logo
3:55 pm - 2:05 pm
SEA
-
OSL
13h 10m
1 stop
$649Scandinavian Airlines
Wed, Aug 12 - Sat, Aug 29
Icelandair Logo
4:30 pm - 8:40 pm
OSL
-
SEA
13h 10m
1 stop
Icelandair Logo
3:40 pm - 3:25 pm
SEA
-
OSL
14h 45m
1 stop
$656Icelandair
Tue, Aug 11 - Wed, Aug 26
United Airlines Logo
6:55 am - 11:55 am
OSL
-
SEA
14h 00m
1 stop
United Airlines Logo
6:50 pm - 5:55 pm
SEA
-
OSL
14h 05m
1 stop
$665United Airlines
Wed, Aug 12 - Wed, Aug 26
United Airlines Logo
6:35 am - 11:55 am
OSL
-
SEA
14h 20m
1 stop
United Airlines Logo
8:10 am - 10:05 pm
SEA
-
OSL
28h 55m
2 stops
$666United Airlines
Tue, Sep 15 - Tue, Sep 29
Scandinavian Airlines Logo
6:00 am - 1:45 pm
TRF
-
SEA
16h 45m
1 stop
Scandinavian Airlines Logo
3:55 pm - 12:25 am
SEA
-
TRF
23h 30m
1 stop
$667Scandinavian Airlines
Tue, Aug 11 - Thu, Aug 27
United Airlines Logo
6:55 am - 11:55 am
OSL
-
SEA
14h 00m
1 stop
United Airlines Logo
7:00 am - 12:20 pm
SEA
-
OSL
20h 20m
2 stops
$667United Airlines
Fri, Aug 14 - Sat, Aug 29
Scandinavian Airlines Logo
6:00 am - 1:45 pm
TRF
-
SEA
16h 45m
1 stop
Scandinavian Airlines Logo
3:55 pm - 12:25 am
SEA
-
TRF
23h 30m
1 stop
$669Scandinavian Airlines
Fri, Aug 14 - Sat, Aug 29
Scandinavian Airlines Logo
9:55 am - 1:45 pm
OSL
-
SEA
12h 50m
1 stop
Scandinavian Airlines Logo
3:55 pm - 12:55 pm
SEA
-
OSL
12h 00m
1 stop
$671Scandinavian Airlines
Mon, Aug 10 - Wed, Aug 26
United Airlines Logo
6:45 am - 10:56 pm
OSL
-
SEA
25h 11m
2 stops
United Airlines Logo
6:50 pm - 5:55 pm
SEA
-
OSL
14h 05m
1 stop
$672United Airlines
Mon, Aug 10 - Thu, Aug 27
United Airlines Logo
9:55 am - 8:46 pm
OSL
-
SEA
19h 51m
2 stops
United Airlines Logo
8:10 am - 12:20 pm
SEA
-
OSL
19h 10m
2 stops
$673United Airlines
Booking Insights

KAYAK's insights & trends for Oslo to Seattle flights

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Oslo to Seattle, 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 Oslo to Seattle is November, where tickets cost $301 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $492 and $472 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Oslo to Seattle, 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 Oslo to Seattle, you should book around 2 weeks before departure, which saves you about 25% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Cheapest flight$400
Flight from Oslo 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 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 flights from Oslo to Seattle

  • What is the cheapest flight from Oslo to Seattle?

    In the last 5 days, the lowest price for a flight from Oslo to Seattle was $400 for a one-way ticket and $649 for a round-trip.

  • Do I need a passport to fly between Oslo and Seattle?

    Yes

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

    There are 2 airports in Oslo (Oslo Gardermoen and Oslo Sandefjord.) and only 1 airport in Seattle (Seattle/Tacoma Intl). The cheapest flights are generally found on the Oslo Airport to Seattle/Tacoma Intl flight route.

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

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

  • Which airline alliances offer flights from Oslo to Seattle?

    SkyTeam is the only airline alliance operating flights between Oslo and Seattle.

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

    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 Oslo to Seattle.

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

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

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

    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 Seattle with an airline and back to Oslo with another airline.

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

    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 Seattle from Oslo up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Oslo to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Oslo to Seattle. 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 Oslo to Seattle? 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.
7.4
Scandinavian AirlinesOverall score based on 1828 reviews
7.7Boarding
8.0Crew
7.3Comfort
6.7Entertainment
6.7Food
Airline reviews

Flight was cancelled without notice or any reason given. I found out coincidentally when i was checking the baggage allowance on the app, When contacting the airline, the only option peresented to us meant we lost a day of our weekend getaway. Had a lot of contact with airline prior to flight, trying to get them to resolve the issue. We could have traveled the first stretch ourselves but the airline refused to accommodate this. The airline outright refused to be forthcoming in agreeing to alternatives that would let ut keep the date we had booked, and so a third of our holiday effectively vanished. This meant a lot of hassle, changing hotel nights, activities etc. Furthermore and after the flight, customer service refused to answer our complaint unless we used their very restrictive online form, which gave us no chance to properly explain what our issues were. They have of course denied our complaint, and so i have to bring the matter further. If you have an alternative airline to use, please do. SAS treats its customers as a necessary evil.

2.0 Mediocrethorsteinn, Jun 2026
OSL - CPH
Read more Scandinavian Airlines reviews

Flight was cancelled without notice or any reason given. I found out coincidentally when i was checking the baggage allowance on the app, When contacting the airline, the only option peresented to us meant we lost a day of our weekend getaway. Had a lot of contact with airline prior to flight, trying to get them to resolve the issue. We could have traveled the first stretch ourselves but the airline refused to accommodate this. The airline outright refused to be forthcoming in agreeing to alternatives that would let ut keep the date we had booked, and so a third of our holiday effectively vanished. This meant a lot of hassle, changing hotel nights, activities etc. Furthermore and after the flight, customer service refused to answer our complaint unless we used their very restrictive online form, which gave us no chance to properly explain what our issues were. They have of course denied our complaint, and so i have to bring the matter further. If you have an alternative airline to use, please do. SAS treats its customers as a necessary evil.

I feel the service staff do not treat American customers well. I also feel there may be discrimination against minorities.

Yes avoid JFK airport at all costs. A horror to navigate.

No free Wi-Fi. I have SkyMiles but not a high status, having an account has been enough for Wi-Fi on other flights, but this one was going to charge me to use it. Also turbulence was really bad toward the end, but I didn't count this in my ratings since I know Delta cannot control the weather - it's 2026 and lack of WiFi alone is enough for a poor rating.

My daughter always gets sick when we order the gluten free meal option. Internet didn’t work as advertised.

All went smoothly. That's what I want on a long flight.

Really good. Everything went smoothly. That's what I hope for when I'm on a long flight, especially with multiple changes. Thank you SAS.

I expected more, but they will nickel and dime you for everything. I did not enjoy flying with this airline.

Curious and efficient service ! First time flying with SAS and very pleased!

I wish they have given us explanations for the delays. And the rebooking process in Copenhagen was too long. I had to wait about 4 hours before they assign me a hotel. From there the handling process (accommodation, transportation and meal) was excellent.

We paid for saga class, which is the business class for international. My seat was broken and did not recline and my monitor for in-flight entertainment was broken.

The flight itself was fine, even with a one-hour delay leaving on the Reykjavik tarmac (the lost time was made up during flight). Our experience at the Reykjavik airport on arrival was terrible due mostly to the one hour it took for passport control. Only two stations were open for our category, and the room was full with a huge crowd.

They cancelled our connecting flight resulting in another layover reaching our final destination 8 hours later than scheduled.

Awful. The Iceland airport was a complete mess. Boarding was a chaotic, the seats were awful, there was a group of rowdy 20 something men in our row hooting and hollering, ordering alcoholic drink after drink. Yelling and laughing at the top of their lungs and the crew just went along with it. Passengers complained to the men, asking if they could keep it down (it was a night time flight so people wanted to sleep). They never listened crew continued to laugh with them, flirt with them and serve them more drinks. No free food or snacks, seats were horribly uncomfortable. Worst flight I've had in a long time

At least one soda free, felt like I was nickeled to death.

On-time arrivals and departures. Crew helpful and friendly. Yet everything costs extra: seat selection, food, even airphones!

Friendly flight crew. Airplane (757) configured as a domestic flight (no lie-flat seats) & no advanced meal selection.

Was a bit surprised that Icelandair flies a domestically configured 757s on long-haul flights to Iceland (no lie-flat seats in business class).

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

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

Information on your arrival and departure airports