HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$289+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oslo Gardermoen to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Oslo Gardermoen to Seattle/Tacoma Intl are usually found in October or November, booked 74 days in advance, depart on a Saturday or Friday and return on a Tuesday

Cheap 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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$424
(Ticket)

One-way from

$289
(Mytrip)

Popular in

July

Cheapest in

October

Average price

$489
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.
Search Deals
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. 19% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find 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 April 17, 2025.

This Ticket deal was found by Cheapflights users on 4/16. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/258:35 amOSL - SEA
1 stop16h 25mMultiple Airlines
Mon 6/91:30 pmSEA - OSL
1 stop25h 00mMultiple Airlines
Deal found 4/16$424
This lastminute.com deal was found by Cheapflights users on 4/16. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/24:20 pmOSL - SEA
1 stop13h 20mIcelandair
Tue 5/67:00 pmSEA - OSL
1 stop11h 25mIcelandair
Deal found 4/16$429
This American Airlines deal was found by Cheapflights users on 4/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/21:10 pmOSL - SEA
1 stop11h 50mAmerican Airlines
Tue 6/171:30 pmSEA - OSL
1 stop24h 55mAmerican Airlines
Deal found 4/17$438
This Ticket deal was found by Cheapflights users on 4/15. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/171:10 pmOSL - SEA
1 stop11h 50mFinnair
Mon 6/25:40 pmSEA - OSL
1 stop13h 55mFinnair
Deal found 4/15$439
This Ticket deal was found by Cheapflights users on 4/16. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/167:50 amOSL - SEA
2 stops22h 13mBritish Airways
Thu 5/291:30 pmSEA - OSL
1 stop25h 25mBritish Airways
Deal found 4/16$444
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/177:15 amOSL - SEA
2 stops34h 11mUnited Airlines
Sun 5/186:50 pmSEA - OSL
1 stop18h 20mUnited Airlines
Deal found 4/16$469
This Lufthansa deal was found by Cheapflights users on 4/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/147:15 amOSL - SEA
1 stop18h 44mLufthansa
Wed 5/216:50 pmSEA - OSL
1 stop14h 15mLufthansa
Deal found 4/16$479
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/256:30 amOSL - SEA
2 stops17h 35mDelta
Mon 6/97:10 amSEA - OSL
2 stops18h 55mDelta
Deal found 4/16$505
This SWISS deal was found by Cheapflights users on 4/16. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/175:40 amOSL - SEA
2 stops24h 51mSWISS
Sun 5/182:40 pmSEA - OSL
2 stops48h 15mSWISS
Deal found 4/16$572
This Expedia deal was found by Cheapflights users on 4/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/166:30 amOSL - SEA
2 stops17h 01mKLM
Thu 5/296:07 pmSEA - OSL
1 stop13h 13mKLM
Deal found 4/16$608
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/277:15 amOSL - SEA
2 stops24h 01mAir Canada
Sun 8/35:35 amSEA - OSL
2 stops27h 30mAir Canada
Deal found 4/16$667
This FlightHub deal was found by Cheapflights users on 4/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/291:10 pmOSL - SEA
1 stop18h 43mScandinavian Airlines
Mon 8/44:00 pmSEA - OSL
1 stop31h 10mScandinavian Airlines
Deal found 4/16$790

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 April 17, 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 5/25

8:35 am-4:00 pm

1 stop16h 25m

Seattle/Tacoma Intl

Mon 6/9

1:30 pm-11:30 pm

1 stop25h 00m

$424

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 5/2

4:20 pm-8:40 pm

1 stop13h 20m

Seattle/Tacoma Intl

Tue 5/6

7:00 pm-3:25 pm

1 stop11h 25m

$429

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 6/2

1:10 pm-4:00 pm

1 stop11h 50m

Seattle/Tacoma Intl

Tue 6/17

1:30 pm-11:25 pm

1 stop24h 55m

$438

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 5/17

1:10 pm-4:00 pm

1 stop11h 50m

Seattle/Tacoma Intl

Mon 6/2

5:40 pm-4:35 pm

1 stop13h 55m

$439

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 5/16

7:50 am-9:03 pm

2 stops22h 13m

Seattle/Tacoma Intl

Thu 5/29

1:30 pm-11:55 pm

1 stop25h 25m

$444

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 5/17

7:15 am-8:26 am

2 stops34h 11m

Seattle/Tacoma Intl

Sun 5/18

6:50 pm-10:10 pm

1 stop18h 20m

$469

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 5/14

7:15 am-4:59 pm

1 stop18h 44m

Seattle/Tacoma Intl

Wed 5/21

6:50 pm-6:05 pm

1 stop14h 15m

$479

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 5/25

6:30 am-3:05 pm

2 stops17h 35m

Seattle/Tacoma Intl

Mon 6/9

7:10 am-11:05 am

2 stops18h 55m

$505

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 5/17

5:40 am-9:31 pm

2 stops24h 51m

Seattle/Tacoma Intl

Sun 5/18

2:40 pm-11:55 pm

2 stops48h 15m

$572

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 5/16

6:30 am-2:31 pm

2 stops17h 01m

Seattle/Tacoma Intl

Thu 5/29

6:07 pm-4:20 pm

1 stop13h 13m

$608

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 22 results
1
2
3

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 April.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Oslo Gardermoen Airport-Seattle flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 11, 2025.

Booking 74 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, January is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of $238). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of $411). 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 April 17, 2025.

It’s typically best to fly out from Oslo Gardermoen Airport to Seattle at noon. Doing so could potentially save you 20% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 17, 2025.
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,327 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,580 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • 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 $429. Additional round-trip tickets that might be worth considering are offered by American Airlines and Finnair, with the lowest prices starting at $438 and $439, respectively. Users have found that Icelandair is 25% 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 Icelandair ($492), Finnair ($496), and British Airways ($642).

  • 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, January is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of $238). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of $411). 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 Oslo Gardermoen Airport?

Book flights to Oslo Gardermoen Airport if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Aberdeen
Kent
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$395Average$535FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$416Average$682FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$419Average$671FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$423Average$563FlexibilityNo cancel feeOn-time76%
DeltaCheapest$452Average$534FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.