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Cheap flights from Oslo Gardermoen Airport to Seattle from £229

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 21/3. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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 31 October 2025.

Round-trip from

£378

One-way from

£229

Popular in

July

Cheapest in

November

Average price

£426
Delta
  • Delta
  • 24/11-10/12
  • 3 total stops
  • 31h 15m total
  • Oslo to Seattle
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British Airways
  • British Airways
  • 21/3
  • 2 total stops
  • 22h 14m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£59 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 October 2025
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Find 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 31 October 2025.

Thu 6/1106:30OSL - SEA
1 stop14h 15mDelta
Wed 19/1116:48SEA - OSL
1 stop17h 02mDelta
Deal found 30/10£379
Mon 24/1106:30OSL - SEA
2 stops21h 10mDelta
Wed 10/1211:50SEA - OSL
2 stops17h 00mDelta
Deal found 30/10£382
Sat 8/1109:25OSL - SEA
2 stops21h 38mDelta
Sun 25/114:10SEA - OSL
1 stop17h 10mDelta
Deal found 30/10£389
Thu 6/1106:30OSL - SEA
2 stops18h 40mKLM
Wed 19/1109:43SEA - OSL
2 stops17h 07mKLM
Deal found 30/10£426
Fri 14/1113:45OSL - SEA
1 stop31h 25mUnited Airlines
Thu 27/1110:53SEA - OSL
2 stops21h 57mUnited Airlines
Deal found 29/10£430
Sat 8/1106:15OSL - SEA
1 stop14h 55mUnited Airlines
Sat 29/1114:00SEA - OSL
1 stop14h 05mUnited Airlines
Deal found 30/10£446
Thu 6/1106:15OSL - SEA
2 stops39h 19mUnited Airlines
Wed 19/1107:00SEA - OSL
2 stops25h 30mUnited Airlines
Deal found 30/10£450

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 31 October 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

Mon 24/11

06:30-18:40

2 stops21h 10m

Seattle/Tacoma Intl

Wed 10/12

11:50-13:50

2 stops17h 00m

£382

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 26/3

13:10-18:00

1 stop12h 50m

Seattle/Tacoma Intl

Mon 30/3

15:45-12:35

1 stop11h 50m

£386

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 26/3

18:25-14:20

1 stop27h 55m

Seattle/Tacoma Intl

Mon 30/3

10:10-22:10

2 stops27h 00m

£396

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 14/11

13:45-12:10

1 stop31h 25m

Seattle/Tacoma Intl

Thu 27/11

10:53-17:50

2 stops21h 57m

£430

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 14/11

06:30-11:45

1 stop14h 15m

Seattle/Tacoma Intl

Thu 27/11

15:00-08:40

1 stop32h 40m

£457

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 26/12

06:30-11:50

1 stop14h 20m

Seattle/Tacoma Intl

Sat 10/1

13:40-16:20

1 stop17h 40m

£584

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 21/3

08:45-22:59

2 stops22h 14m

£229

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 9/12

06:15-21:00

3 stops23h 45m

£1,073

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 22/3

18:45-20:35

4 stops57h 50m

£1,226

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 9/12

18:45-20:54

4 stops59h 09m

£1,303

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 13 results
1
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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 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 24 October 2025.

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, February is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of £272). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of £379). 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.

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 £386, Delta can have you in Seattle from Oslo Gardermoen Airport in 12h 50m. Airlines will cover a distance of 4551 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Oslo Gardermoen Airport to Seattle one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £229. United Airlines flights start at £1,073 while deals on Ethiopian Air start at £1,226 one-way.

  • 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, February is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of £272). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of £379). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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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.

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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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