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$355+ Cheap flights from Oslo Gardermoen (OSL) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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The best prices from Oslo Gardermoen to Seattle/Tacoma Intl are usually found in March or October, booked 59 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 febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$355
(Ticket)

Popular in

August

Cheapest in

March

Average price

$509
Provider with most accurate pricing for Oslo Gardermoen-Seattle/Tacoma Intl flight deals.
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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
Highest demand for flights based on searches. 16% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 febrero 20, 2025.

This Ticket deal was found by Cheapflights users on 2/20. 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.
vie. 5/28:30 pmOSL - SEA
1 stop28h 30mMultiple Airlines
lun. 5/58:20 pmSEA - OSL
1 stop18h 10mMultiple Airlines
Deal found 2/20$355
This Ticket deal was found by Cheapflights users on 2/20. 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.
vie. 4/254:20 pmOSL - SEA
1 stop13h 20mIcelandair
mié. 4/307:00 pmSEA - OSL
1 stop32h 35mIcelandair
Deal found 2/20$382
This Ticket deal was found by Cheapflights users on 2/20. 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.
lun. 3/107:15 amOSL - SEA
2 stops25h 33mBritish Airways
lun. 3/247:00 amSEA - OSL
2 stops31h 40mBritish Airways
Deal found 2/20$395
This Travelis deal was found by Cheapflights users on 2/20. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/18:35 amOSL - SEA
2 stops23h 34mFinnair
dom. 5/45:40 pmSEA - OSL
1 stop17h 05mFinnair
Deal found 2/20$407
This United Airlines deal was found by Cheapflights users on 2/20. 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.
vie. 4/256:35 amOSL - SEA
3 stops27h 33mUnited Airlines
mar. 4/293:24 pmSEA - OSL
2 stops17h 51mUnited Airlines
Deal found 2/20$464
This Flysmarter deal was found by Cheapflights users on 2/20. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/186:35 amOSL - SEA
2 stops25h 08mLufthansa
mié. 4/236:50 pmSEA - OSL
1 stop18h 20mLufthansa
Deal found 2/20$482
This TAP AIR PORTUGAL deal was found by Cheapflights users on 2/20. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/26:50 pmOSL - SEA
2 stops36h 36mTAP AIR PORTUGAL
lun. 5/511:35 amSEA - OSL
3 stops22h 40mTAP AIR PORTUGAL
Deal found 2/20$1,462
This Ethiopian Air deal was found by Cheapflights users on 2/20. 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 Ethiopian Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/187:45 pmOSL - SEA
4 stops57h 36mEthiopian Air
mié. 4/238:15 amSEA - OSL
4 stops39h 30mEthiopian Air
Deal found 2/20$2,723
This Cathay Pacific deal was found by Cheapflights users on 2/20. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/186:35 amOSL - SEA
3 stops44h 01mCathay Pacific
mié. 4/238:13 amSEA - OSL
3 stops43h 02mCathay Pacific
Deal found 2/20$11,832

Find flights from Oslo Gardermoen to Seattle within your budget

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 febrero 20, 2025.

Fly from

Oslo Gardermoen

Fly to

Seattle

Route

Depart

Return

Price

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 5/2

8:30 pm-4:00 pm

1 stop28h 30m

Seattle/Tacoma Intl

lun. 5/5

8:20 pm-11:30 pm

1 stop18h 10m

$355

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 4/25

4:20 pm-8:40 pm

1 stop13h 20m

Seattle/Tacoma Intl

mié. 4/30

7:00 pm-12:35 pm

1 stop32h 35m

$382

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

lun. 3/10

7:15 am-12:48 am

2 stops25h 33m

Seattle/Tacoma Intl

lun. 3/24

7:00 am-10:40 pm

2 stops31h 40m

$395

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 5/1

8:35 am-11:09 pm

2 stops23h 34m

Seattle/Tacoma Intl

dom. 5/4

5:40 pm-7:45 pm

1 stop17h 05m

$407

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 4/25

6:35 am-1:08 am

3 stops27h 33m

Seattle/Tacoma Intl

mar. 4/29

3:24 pm-6:15 pm

2 stops17h 51m

$464

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 4/18

6:35 am-10:43 pm

2 stops25h 08m

Seattle/Tacoma Intl

mié. 4/23

6:50 pm-10:10 pm

1 stop18h 20m

$482

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 5/2

6:50 pm-10:26 pm

2 stops36h 36m

Seattle/Tacoma Intl

lun. 5/5

11:35 am-7:15 pm

3 stops22h 40m

$1,462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 4/18

7:45 pm-8:21 pm

4 stops57h 36m

Seattle/Tacoma Intl

mié. 4/23

8:15 am-8:45 am

4 stops39h 30m

$2,723

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 4/18

6:35 am-5:36 pm

3 stops44h 01m

Seattle/Tacoma Intl

mié. 4/23

8:13 am-12:15 pm

3 stops43h 02m

$11,832

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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 February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Oslo Gardermoen Airport-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Travel insights for flights from Oslo Gardermoen to Seattle

Get recent, data-driven insights about flights from Oslo Gardermoen to Seattle including ideal travel times, pricing trends, and more.

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 February 14, 2025.

Booking 59 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 febrero 20, 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 febrero 20, 2025.
Finnair
7.6
Good
1,273 reviews

Crew

8.1

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Reviews

1 / 20

4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Finnair
7.6
Good
1,273 reviews
Finnair
7.6
Good
1,273 reviews

Crew

8.1

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Reviews

1 / 20

4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Cathay Pacific
7.5
Good
821 reviews
Finnair
7.6
Good
1,273 reviews

Crew

8.1

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Reviews

1 / 20

4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

United Airlines
7.4
Good
8,766 reviews
Finnair
7.6
Good
1,273 reviews

Crew

8.1

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Reviews

1 / 20

4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

Ethiopian Air
7.2
Good
775 reviews
Finnair
7.6
Good
1,273 reviews

Crew

8.1

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Reviews

1 / 20

4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

TAP AIR PORTUGAL
7.1
Good
1,847 reviews
Finnair
7.6
Good
1,273 reviews

Crew

8.1

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.7

Food

6.7

Reviews

1 / 20

4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

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 $382. Additional round-trip tickets that might be worth considering are offered by British Airways and Finnair, with the lowest prices starting at $395 and $407, respectively. Users have found that Icelandair is 32% cheaper than the other options available to this destination.

  • 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
Renton
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

Browse thousands of different options on Cheapflights for your next trip

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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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$382Average$567FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$395Average$561FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$416Average$608FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$419Average$675FlexibilityNo cancel feeOn-time70%
DeltaCheapest$452Average$619FlexibilityNo cancel feeOn-timeN/A
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