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Cheap flights from Oslo Gardermoen Airport to Seattle from £336

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
5 Sep — 12 Sep1
1 adult

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 August 2025.

Round-trip from

£336

Popular in

July

Cheapest in

October

Average price

£460
15/10-22/10
  • 15/10-22/10
  • 3 total stops
  • 38h 02m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£53 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 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 31 August 2025.

Wed 15/1008:35OSL - SEA
2 stops19h 52mMultiple Airlines
Wed 22/1020:20SEA - OSL
1 stop18h 10mMultiple Airlines
Deal found 31/8£336
Thu 9/1011:50OSL - SEA
2 stops18h 00mDelta
Mon 13/1012:45SEA - OSL
2 stops18h 55mDelta
Deal found 29/8£343
Fri 26/1207:10OSL - SEA
1 stop18h 45mBritish Airways
Sun 11/118:50SEA - OSL
1 stop18h 50mBritish Airways
Deal found 30/8£343
Mon 6/1008:35OSL - SEA
2 stops19h 54mMultiple Airlines
Sun 19/1013:30SEA - OSL
1 stop25h 10mMultiple Airlines
Deal found 30/8£344
Mon 6/1006:35OSL - SEA
1 stop14h 20mUnited Airlines
Sun 19/1018:50SEA - OSL
1 stop18h 20mUnited Airlines
Deal found 30/8£345
Mon 6/1017:05OSL - SEA
2 stops36h 41mBritish Airways
Sun 19/1010:39SEA - OSL
2 stops28h 01mBritish Airways
Deal found 30/8£348
Fri 3/1007:50OSL - SEA
2 stops23h 14mBritish Airways
Fri 10/1013:30SEA - OSL
1 stop24h 00mBritish Airways
Deal found 29/8£352
Mon 6/1009:20OSL - SEA
1 stop35h 30mDelta
Sun 19/1017:40SEA - OSL
1 stop30h 05mDelta
Deal found 31/8£352
Fri 3/1018:50OSL - SEA
1 stop26h 05mLufthansa
Fri 10/1014:20SEA - OSL
1 stop18h 40mLufthansa
Deal found 29/8£389
Fri 26/1206:15OSL - SEA
2 stops25h 32mUnited Airlines
Sat 10/107:00SEA - OSL
2 stops25h 40mUnited Airlines
Deal found 31/8£424

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 August 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

Wed 15/10

08:35-19:27

2 stops19h 52m

Seattle/Tacoma Intl

Wed 22/10

20:20-23:30

1 stop18h 10m

£336

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 9/10

11:50-20:50

2 stops18h 00m

Seattle/Tacoma Intl

Mon 13/10

12:45-16:40

2 stops18h 55m

£343

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 26/12

15:05-11:30

1 stop29h 25m

Seattle/Tacoma Intl

Sat 10/1

11:54-10:35

2 stops37h 41m

£343

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 26/12

07:10-16:55

1 stop18h 45m

Seattle/Tacoma Intl

Sun 11/1

18:50-22:40

1 stop18h 50m

£343

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 6/10

08:35-19:29

2 stops19h 54m

Seattle/Tacoma Intl

Sun 19/10

13:30-23:40

1 stop25h 10m

£344

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 6/10

06:35-11:55

1 stop14h 20m

Seattle/Tacoma Intl

Sun 19/10

18:50-22:10

1 stop18h 20m

£345

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 6/10

17:05-20:46

2 stops36h 41m

Seattle/Tacoma Intl

Sun 19/10

10:39-23:40

2 stops28h 01m

£348

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 3/10

07:50-22:04

2 stops23h 14m

Seattle/Tacoma Intl

Fri 10/10

13:30-22:30

1 stop24h 00m

£352

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 6/10

09:20-11:50

1 stop35h 30m

Seattle/Tacoma Intl

Sun 19/10

17:40-08:45

1 stop30h 05m

£352

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 8/9

06:45-10:45

3 stops37h 00m

£969

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 16 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 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 29 August 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, January is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of £622). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of £946). 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, Delta can have you in Seattle from Oslo Gardermoen Airport in 18h. 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, January is the cheapest month in which you can book a flight from Oslo Gardermoen Airport to Seattle (average of £622). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of £946). 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
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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.

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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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