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Cheap flights from Oslo Gardermoen Airport to Seattle from £235

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
28 Mar — 4 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Oslo Gardermoen to Seattle

Enter your travel dates to find the best prices.

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 26 February 2026.

Wed 22/413:50
OSL
-
SEA
1 stop13h 05m
Icelandair
Sun 26/415:40
SEA
-
OSL
1 stop11h 55m
Icelandair
Deal found 23/2£343
Fri 10/406:30
OSL
-
SEA
1 stop14h 15m
Delta
Fri 17/407:15
SEA
-
OSL
2 stops18h 50m
Delta
Deal found 24/2£370
Fri 13/306:30
OSL
-
SEA
1 stop14h 05m
Delta
Tue 17/307:20
SEA
-
OSL
2 stops17h 20m
Delta
Deal found 25/2£371
Thu 9/408:35
OSL
-
SEA
2 stops23h 03m
Finnair
Thu 23/413:19
SEA
-
OSL
2 stops21h 26m
Finnair
Deal found 26/2£372
Wed 8/411:50
OSL
-
SEA
2 stops19h 34m
Delta
Wed 15/416:36
SEA
-
OSL
2 stops16h 59m
Delta
Deal found 22/2£374
Thu 2/406:45
OSL
-
SEA
1 stop14h 35m
United Airlines
Thu 16/414:10
SEA
-
OSL
1 stop16h 40m
United Airlines
Deal found 24/2£403
Thu 9/406:45
OSL
-
SEA
1 stop14h 35m
United Airlines
Thu 23/414:10
SEA
-
OSL
1 stop16h 40m
United Airlines
Deal found 26/2£404

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 26 February 2026.

Round-trip from

£343

One-way from

£235

Popular in

December

Cheapest in

May

Average price

£458
Icelandair
  • Icelandair
  • 22/4-26/4
  • 2 total stops
  • 25h 00m total
  • Oslo to Seattle
Search Deals
Finnair
  • Finnair
  • 6/5
  • 2 total stops
  • 18h 48m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£11 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 26 February 2026.
Use the filters below to find and compare flights from Oslo Gardermoen Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 22/4

13:50-17:55

1 stop13h 05m

Seattle/Tacoma Intl

Sun 26/4

15:40-12:35

1 stop11h 55m

£343

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 8/4

06:30-16:30

1 stop19h 00m

Seattle/Tacoma Intl

Wed 15/4

16:36-18:35

2 stops16h 59m

£370

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 9/4

08:35-00:36

2 stops25h 01m

Seattle/Tacoma Intl

Thu 23/4

13:19-19:45

2 stops21h 26m

£372

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 13/3

06:30-18:38

2 stops20h 08m

Seattle/Tacoma Intl

Tue 17/3

06:00-08:40

2 stops18h 40m

£376

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 2/4

06:45-12:20

1 stop14h 35m

Seattle/Tacoma Intl

Thu 16/4

14:10-15:50

1 stop16h 40m

£403

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 9/4

06:45-12:20

1 stop14h 35m

Seattle/Tacoma Intl

Thu 23/4

14:10-18:15

1 stop19h 05m

£404

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 12/4

06:25-19:42

2 stops46h 17m

Seattle/Tacoma Intl

Sun 19/4

22:35-22:05

2 stops38h 30m

£407

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 22/4

06:35-19:45

2 stops22h 10m

Seattle/Tacoma Intl

Sun 26/4

12:08-17:15

3 stops44h 07m

£409

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 6/5

12:50-22:38

2 stops18h 48m

£235

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 24/5

08:35-23:39

2 stops24h 04m

£235

Flights are sorted by cheapest return flights first.

Deals found on 22/2

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 return 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 return flight from Oslo Gardermoen to Seattle. Price data was last updated on 20 February 2026.

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 £273). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of £381). 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.

How much does it cost for a return flight from Oslo Gardermoen Airport to Seattle?

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), located 11.4 mi from the city center, is the airport you fly into when you book flights from Oslo Gardermoen to Seattle. 0 airlines have flights to Seattle/Tacoma Intl from Oslo Gardermoen on a regular basis. Booking flights from Oslo Gardermoen to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 0 inbound flights from Oslo Gardermoen per day.

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

    For as low as £343, Icelandair can have you in Seattle from Oslo Gardermoen Airport in 13h 05m. Airlines will cover a distance of 4551 mi. This flight may include one or multiple stops.

  • 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 holiday 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 £273). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of £381). 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

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Why should you use Cheapflights to find cheap flight tickets from Oslo Gardermoen to Seattle?

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Can Cheapflights find flights from Oslo Gardermoen to Seattle with no change fees?

Yes, we can. To see specific flights from Oslo Gardermoen to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Oslo Gardermoen to Seattle become cheaper?

Not ready to book yet? You can track prices for flights from Oslo Gardermoen to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

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