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$371+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Oslo Gardermoen to Seattle/Tacoma Intl are usually found in November or October, 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 June 12, 2025.

Round-trip from

$487
(United Airlines)

One-way from

$371
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$670
From Oslo Gardermoen to Seattle/Tacoma Intl
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One-way flight from Oslo Gardermoen to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 18% potential increase in price ($127 potential increase over avg. RT price).
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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 June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 7/139:50 amOSL - SEA
2 stops31h 11mUnited Airlines
Mon 7/285:00 amSEA - OSL
2 stops28h 00mUnited Airlines
Deal found 6/11$487
This Travelis deal was found by Cheapflights users on 6/11. 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.
Mon 7/218:35 amOSL - SEA
1 stop16h 25mFinnair
Sun 8/35:40 pmSEA - OSL
1 stop17h 05mFinnair
Deal found 6/11$504
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Wed 7/167:40 amOSL - SEA
2 stops26h 03mAmerican Airlines
Sun 8/35:40 pmSEA - OSL
1 stop13h 55mAmerican Airlines
Deal found 6/11$531
This Flysmarter deal was found by Cheapflights users on 6/10. 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.
Tue 7/157:25 pmOSL - SEA
2 stops32h 46mBritish Airways
Tue 7/291:30 pmSEA - OSL
2 stops21h 15mBritish Airways
Deal found 6/10$562
This Lufthansa deal was found by Cheapflights users on 6/10. 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 7/236:50 amOSL - SEA
1 stop14h 05mLufthansa
Mon 1/192:00 pmSEA - OSL
1 stop16h 20mLufthansa
Deal found 6/10$572
This Gotogate deal was found by Cheapflights users on 6/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/18:55 pmOSL - SEA
1 stop25h 55mScandinavian Airlines
Sun 8/174:00 pmSEA - OSL
1 stop19h 15mScandinavian Airlines
Deal found 6/10$605
This Travelis deal was found by Cheapflights users on 6/10. 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.
Tue 7/227:25 pmOSL - SEA
1 stop25h 10mMultiple Airlines
Tue 8/58:00 amSEA - OSL
2 stops26h 45mMultiple Airlines
Deal found 6/10$608
This Delta deal was found by Cheapflights users on 6/11. 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.
Mon 7/2111:50 amOSL - SEA
1 stop13h 00mDelta
Tue 8/58:25 pmSEA - OSL
1 stop15h 15mDelta
Deal found 6/11$609
This SWISS deal was found by Cheapflights users on 6/11. 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.
Thu 7/171:55 pmOSL - SEA
2 stops37h 41mSWISS
Sat 8/24:20 pmSEA - OSL
1 stop22h 35mSWISS
Deal found 6/11$625
This Gotogate deal was found by Cheapflights users on 6/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/216:35 amOSL - SEA
2 stops21h 01mAir Canada
Mon 7/71:45 pmSEA - OSL
2 stops19h 20mAir Canada
Deal found 6/11$653
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:15 pmOSL - SEA
1 stop25h 20mKLM
Tue 7/291:50 pmSEA - OSL
1 stop13h 40mKLM
Deal found 6/11$783
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/151:50 pmOSL - SEA
1 stop13h 00mIcelandair
Tue 7/297:00 pmSEA - OSL
1 stop11h 25mIcelandair
Deal found 6/10$796

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 June 12, 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 7/13

9:50 am-8:01 am

2 stops31h 11m

Seattle/Tacoma Intl

Mon 7/28

5:00 am-6:00 pm

2 stops28h 00m

$487

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 7/21

8:35 am-4:00 pm

1 stop16h 25m

Seattle/Tacoma Intl

Sun 8/3

5:40 pm-7:45 pm

1 stop17h 05m

$504

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 7/16

7:40 am-12:43 am

2 stops26h 03m

Seattle/Tacoma Intl

Sun 8/3

5:40 pm-4:35 pm

1 stop13h 55m

$531

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 7/15

7:25 pm-7:11 pm

2 stops32h 46m

Seattle/Tacoma Intl

Tue 7/29

1:30 pm-7:45 pm

2 stops21h 15m

$562

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 7/23

6:50 am-11:55 am

1 stop14h 05m

Seattle/Tacoma Intl

Mon 1/19

2:00 pm-3:20 pm

1 stop16h 20m

$572

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 8/1

8:55 pm-1:50 pm

1 stop25h 55m

Seattle/Tacoma Intl

Sun 8/17

4:00 pm-8:15 pm

1 stop19h 15m

$605

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 7/22

7:25 pm-11:35 am

1 stop25h 10m

Seattle/Tacoma Intl

Tue 8/5

8:00 am-7:45 pm

2 stops26h 45m

$608

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 7/21

11:50 am-3:50 pm

1 stop13h 00m

Seattle/Tacoma Intl

Tue 8/5

8:25 pm-8:40 pm

1 stop15h 15m

$609

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 7/17

1:55 pm-6:36 pm

2 stops37h 41m

Seattle/Tacoma Intl

Sat 8/2

4:20 pm-11:55 pm

1 stop22h 35m

$625

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 7/15

7:15 pm-11:35 am

1 stop25h 20m

Seattle/Tacoma Intl

Tue 7/29

1:50 pm-12:30 pm

1 stop13h 40m

$783

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 23 results
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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 June 9, 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 $391). 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 June 12, 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 June 12, 2025.
Get a feel of what it's like to fly with Delta, KLM and Finnair from Oslo to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Cathay Pacific
7.6
Good
892 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection 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 7 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 United Airlines is currently your cheapest option to Seattle, with prices starting at $487. Additional round-trip tickets that might be worth considering are offered by Finnair and American Airlines, with the lowest prices starting at $504 and $531, respectively. Users have found that United Airlines is 16% 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 Finnair ($488), Scandinavian Airlines ($494), and Lufthansa ($495).

  • 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 $391). 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
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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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 7 airlines flying from Oslo Gardermoen to Seattle

Discover the top 7 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$399Average$499FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$416Average$581FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$419Average$615FlexibilityNo cancel feeOn-time70%
FinnairCheapest$422Average$450FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$423Average$558FlexibilityNo cancel feeOn-time76%
DeltaCheapest$452Average$534FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$504Average$694FlexibilityNo cancel feeOn-time77%

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