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$298+ Cheap flights from Oslo Gardermoen (OSL) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheapflights Tip: The best prices from Oslo Gardermoen to Seattle/Tacoma Intl are usually found in May or January, booked 61 days in advance, depart on a Saturday or Friday and return on a Tuesday

Cheap flight deals from Oslo Gardermoen to Seattle

Cheapest flights from Oslo Gardermoen to Seattle
Explore the most affordable flight options available from Oslo Gardermoen to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This Sembo deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:25 amOSL - SEA
1 stop16h 00mMultiple Airlines
Tue 12/233:05 pmSEA - OSL
1 stop32h 35mMultiple Airlines
Deal found 12/3$1,249

Find flight deals from Oslo Gardermoen to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Oslo Gardermoen (OSL) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$405
(Ticket)

One-way from

$298
(Finnair)

Popular in

July

Cheapest in

May

Average price

$687
Provider with most accurate pricing for Oslo Gardermoen-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Oslo Gardermoen-Seattle/Tacoma Intl flights.
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From Oslo Gardermoen to Seattle/Tacoma Intl
Search Deals
One-way flight from Oslo Gardermoen to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Oslo Gardermoen to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from Oslo Gardermoen Airport to Seattle that are best for you.

Fly from

Oslo Gardermoen

Fly to

Seattle

Route

Depart

Return

Price

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/7

2:35 pm-8:35 pm

1 stop21h 00m

$408

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 3/24

1:10 pm-6:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Fri 3/27

3:35 pm-11:35 am

1 stop12h 00m

$439

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 3/5

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-11:35 am

1 stop12h 00m

$462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 3/5

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Tue 3/17

3:35 pm-11:35 am

1 stop12h 00m

$462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 3/4

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Tue 3/17

3:35 pm-11:35 am

1 stop12h 00m

$462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 3/4

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-11:35 am

1 stop12h 00m

$462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 3/2

6:15 am-12:10 pm

1 stop14h 55m

Seattle/Tacoma Intl

Fri 3/20

3:00 pm-3:40 pm

1 stop16h 40m

$463

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 3/1

9:30 pm-5:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-11:35 am

1 stop12h 00m

$464

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 3/5

1:10 pm-5:00 pm

1 stop12h 50m

Seattle/Tacoma Intl

Mon 3/9

3:35 pm-11:35 am

1 stop12h 00m

$465

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 1/25

6:05 am-11:15 pm

2 stops26h 10m

Seattle/Tacoma Intl

Sat 2/7

10:58 am-3:20 pm

2 stops43h 22m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 19 results
1
2

Compare providers for flights from Oslo Gardermoen to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Oslo Gardermoen to Seattle in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Oslo Gardermoen Airport-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Oslo Gardermoen Airport-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Oslo Gardermoen Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Oslo Gardermoen Airport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Oslo Gardermoen Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Oslo Gardermoen to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Oslo Gardermoen with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Oslo Gardermoen Airport to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Oslo Gardermoen to Seattle. Price data was last updated on November 28, 2025.

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from Oslo Gardermoen Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Oslo Gardermoen Airport to Seattle?

Currently, November is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of $357). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of $493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from OSL to SEA?

Find hourly flight availability from Oslo Gardermoen to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

It’s typically best to fly out from Oslo Gardermoen Airport to Seattle in the evening. Doing so could potentially save you 19% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated December 4, 2025.
See what other customers who have flown with Delta, Scandinavian Airlines, and Icelandair from Oslo Gardermoen Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Scandinavian Airlines
7.4
Good
1,592 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.0
Good
584 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,612 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,562 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Oslo Gardermoen to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Oslo Gardermoen?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Oslo Gardermoen to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Oslo Gardermoen; the airport handles an average of 0 inbound flights from Oslo Gardermoen per day. You should also have plenty of airline options to choose from since 5 airlines have flights to the Seattle airport from Oslo Gardermoen. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

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

    There are many flights that can get you from Oslo Gardermoen Airport to Seattle in 28h 30m. Fly via Icelandair to get the fastest option. Airlines will cover a distance of 4551 mi.

  • What are the cheapest airlines flying from Oslo Gardermoen Airport to Seattle round-trip?

    Flying on Icelandair is currently your cheapest option to Seattle, with prices starting at $395. Additional round-trip tickets that might be worth considering are offered by Lufthansa and British Airways, with the lowest prices starting at $436 and $442, respectively. Users have found that Icelandair is 31% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Oslo Gardermoen Airport to Seattle one-way?

    The cheapest airlines for a one-way flight from Oslo Gardermoen Airport to Seattle are Scandinavian Airlines ($251), American Airlines ($275), and Finnair ($303).

  • Can I find deals for flights from Oslo Gardermoen to Seattle that include hotel bookings?

    Yes. In addition to deals on Oslo Gardermoen to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oslo Gardermoen to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oslo Gardermoen to Seattle.

  • Can I find deals for business class flights from Oslo Gardermoen to Seattle?

    Yes. Cheapflights offers flight deals from Oslo Gardermoen to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of $357). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of $493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
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Alternative routes for Oslo Gardermoen to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Sandefjord to Seattle flights
Oslo Gardermoen to Portland flights
Sandefjord to Portland flights

Top 5 airlines flying from Oslo Gardermoen to Seattle

Discover the top 5 airlines that operate flights from Oslo Gardermoen to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$395Average$616FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$436Average$539FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$442Average$620FlexibilityNo cancel feeOn-time70%
DeltaCheapest$452Average$480FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$603Average$703FlexibilityNo cancel feeOn-time77%

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