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Cheap flights from Oslo Gardermoen Airport to Seattle from £300

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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
10 Jul — 17 Jul1
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 10 June 2026.

Wed 30/917:10
OSL
-
SEA
1 stop27h 25m
Multiple Airlines
Fri 2/1019:00
SEA
-
OSL
1 stop11h 25m
Multiple Airlines
Deal found 9/6£485
Wed 18/1106:15
OSL
-
SEA
2 stops20h 12m
Delta
Mon 30/1114:05
SEA
-
OSL
1 stop17h 15m
Delta
Deal found 7/6£493
Mon 16/1106:15
OSL
-
SEA
1 stop14h 45m
United Airlines
Tue 1/1205:07
SEA
-
OSL
2 stops27h 33m
United Airlines
Deal found 7/6£495
Mon 16/1106:15
OSL
-
SEA
1 stop14h 45m
United Airlines
Fri 4/1223:59
SEA
-
OSL
2 stops30h 46m
United Airlines
Deal found 7/6£496
Thu 17/906:45
OSL
-
SEA
1 stop14h 10m
United Airlines
Mon 21/914:10
SEA
-
OSL
1 stop19h 10m
United Airlines
Deal found 9/6£497
Fri 20/1112:35
OSL
-
SEA
2 stops20h 24m
Delta
Wed 2/1211:15
SEA
-
OSL
2 stops20h 05m
Delta
Deal found 7/6£498
Tue 17/1106:15
OSL
-
SEA
2 stops20h 54m
United Airlines
Sun 29/1114:50
SEA
-
OSL
1 stop17h 50m
United Airlines
Deal found 7/6£499
Tue 17/1106:15
OSL
-
SEA
2 stops20h 54m
United Airlines
Mon 30/1114:00
SEA
-
OSL
1 stop14h 05m
United Airlines
Deal found 7/6£499
Wed 30/913:50
OSL
-
SEA
1 stop13h 05m
Icelandair
Sat 3/1019:00
SEA
-
OSL
1 stop11h 25m
Icelandair
Deal found 9/6£508
Mon 16/1114:40
OSL
-
SEA
1 stop29h 50m
British Airways
Tue 1/1218:50
SEA
-
OSL
1 stop31h 05m
British Airways
Deal found 7/6£508
Tue 17/1113:55
OSL
-
SEA
1 stop31h 05m
United Airlines
Tue 1/1205:07
SEA
-
OSL
2 stops27h 33m
United Airlines
Deal found 7/6£510
Tue 29/907:45
OSL
-
SEA
2 stops24h 12m
Multiple Airlines
Wed 30/919:00
SEA
-
OSL
1 stop32h 35m
Multiple Airlines
Deal found 9/6£513

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 10 June 2026.

Round-trip from

£485

One-way from

£300

Popular in

June

Cheapest in

October

Average price

£603
Icelandair
  • Icelandair
  • 30/9-2/10
  • 2 total stops
  • 38h 50m total
  • Oslo to Seattle
Search Deals
British Airways
  • British Airways
  • 27/10
  • 2 total stops
  • 23h 50m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£51 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 10 June 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

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 21/11

06:15-12:00

1 stop14h 45m

Seattle/Tacoma Intl

Wed 2/12

05:07-17:40

2 stops27h 33m

£495
Fastest return journey

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 28/9

06:45-11:55

1 stop14h 10m

Seattle/Tacoma Intl

Thu 1/10

18:50-22:05

1 stop18h 15m

£497

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 17/9

06:45-11:55

1 stop14h 10m

Seattle/Tacoma Intl

Mon 21/9

14:10-18:20

1 stop19h 10m

£497

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 17/11

06:15-18:59

2 stops21h 44m

Seattle/Tacoma Intl

Wed 2/12

14:50-17:40

1 stop17h 50m

£499

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 17/11

13:55-12:00

1 stop31h 05m

Seattle/Tacoma Intl

Tue 1/12

05:07-17:40

2 stops27h 33m

£510

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 29/9

06:55-18:32

2 stops20h 37m

Seattle/Tacoma Intl

Fri 2/10

14:10-09:05

1 stop33h 55m

£519

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 13/7

06:45-09:40

2 stops35h 55m

Seattle/Tacoma Intl

Tue 28/7

14:10-09:05

1 stop33h 55m

£563

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 21/7

13:10-09:40

2 stops29h 30m

Seattle/Tacoma Intl

Tue 28/7

10:29-22:05

2 stops26h 36m

£566
Cheapest one-way

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 25/8

19:30-11:35

1 stop25h 05m

£301

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 1/9

07:45-18:25

1 stop19h 40m

£318

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 15 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 73 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 £380). Flying from Oslo Gardermoen Airport to Seattle in June is currently the most expensive (average of £603). 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 £495, United Airlines can have you in Seattle from Oslo Gardermoen Airport in 14h 45m. Airlines will cover a distance of 4551 mi.

  • 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 £380). Flying from Oslo Gardermoen Airport to Seattle in June is currently the most expensive (average of £603). 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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