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Cheap flights from Oslo Gardermoen Airport to Seattle from £316

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
6 Sep — 13 Sep1
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 7 August 2026.

Thu 15/1013:30 -
1 stop16h 10m
Mon 19/1015:40 -
1 stop11h 55m
Deal found 3/8£422
Mon 7/920:30 -
2 stops31h 17m
Tue 22/920:20 -
1 stop18h 00m
Deal found 6/8£426
Mon 7/920:30 -
2 stops31h 17m
Tue 22/913:40 -
2 stops17h 55m
Deal found 4/8£428
Sat 5/912:50 -
2 stops20h 23m
Sat 19/907:51 -
2 stops26h 54m
Deal found 5/8£429
Tue 1/911:50 -
2 stops19h 15m
Tue 8/921:50 -
1 stop16h 10m
Deal found 4/8£429
Mon 14/911:50 -
2 stops20h 10m
Tue 22/921:50 -
1 stop16h 10m
Deal found 5/8£430
Tue 15/906:30 -
1 stop14h 17m
Mon 21/918:45 -
1 stop19h 35m
Deal found 5/8£431
Wed 16/911:35 -
1 stop33h 00m
Thu 24/913:30 -
1 stop25h 20m
Deal found 5/8£434
Sat 5/911:50 -
1 stop13h 45m
Sat 19/907:15 -
2 stops18h 50m
Deal found 5/8£435

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 7 August 2026.

Round-trip from

£422

One-way from

£316

Popular in

June

Cheapest in

October

Average price

£542
Icelandair
  • Icelandair
  • 15/10-19/10
  • 2 total stops
  • 28h 05m total
  • Oslo to Seattle
Search Deals
30/9
  • 30/9
  • 2 total stops
  • 20h 21m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£49 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 7 August 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

Cheapest return flight
Fastest return journey

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Wed 14/10

13:50-17:55

1 stop13h 05m

Seattle/Tacoma Intl

Sat 17/10

19:00-15:25

1 stop11h 25m

£426

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 7/9

20:30-18:47

2 stops31h 17m

Seattle/Tacoma Intl

Tue 22/9

20:20-23:20

1 stop18h 00m

£426

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Thu 3/9

11:50-23:11

2 stops20h 21m

Seattle/Tacoma Intl

Thu 10/9

13:50-16:20

1 stop17h 30m

£437

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 7/9

17:05-20:52

2 stops36h 47m

Seattle/Tacoma Intl

Tue 22/9

13:40-23:20

2 stops24h 40m

£439

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Thu 24/9

11:50-23:00

2 stops20h 10m

Seattle/Tacoma Intl

Thu 1/10

10:35-11:05

2 stops15h 30m

£439

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Mon 7/9

06:30-19:05

2 stops21h 35m

Seattle/Tacoma Intl

Tue 22/9

07:15-11:05

2 stops18h 50m

£439

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Wed 14/10

07:45-20:15

2 stops21h 30m

Seattle/Tacoma Intl

Sat 17/10

11:17-14:25

2 stops18h 08m

£442

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Tue 1/9

11:50-23:20

2 stops20h 30m

Seattle/Tacoma Intl

Tue 8/9

07:15-11:05

2 stops18h 50m

£474

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Sat 5/9

11:50-22:20

2 stops19h 30m

Seattle/Tacoma Intl

Sat 19/9

07:15-11:05

2 stops18h 50m

£500

OsloSeattle

OSL Oslo Gardermoen - SEA Seattle/Tacoma Intl

OSLSEA

Oslo Gardermoen

Sat 29/8

06:15-11:55

1 stop14h 40m

Seattle/Tacoma Intl

Sun 30/8

07:00-18:25

2 stops26h 25m

£507

Flights are sorted by cheapest return flights first.

Deals found on 6/8

Showing 1-10 of 19 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?

Booking 90 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, October is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of £399). Flying from Oslo Gardermoen Airport to Seattle in June is currently the most expensive (average of £605). 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?

Airfare is below average for this route at the moment.

Oslo Gardermoen Airport to Seattle flights typically cost between £466 and £594 in October.
The cheapest return price found within the last 5 days was £422 on Icelandair (15 Oct–19 Oct).

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 £422, Icelandair can have you in Seattle from Oslo Gardermoen Airport in 16h 10m. 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, October is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of £399). Flying from Oslo Gardermoen Airport to Seattle in June is currently the most expensive (average of £605). 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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