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Cheap flights from Oslo Gardermoen Airport to Seattle from £355

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 23/7. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
30 may. — 6 jun.1
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 30 abril 2026.

sáb. 16/509:20
OSL
-
SEA
2 stops20h 45m
Delta
lun. 1/622:05
SEA
-
OSL
1 stop13h 35m
Delta
Deal found 29/4£405
mar. 2/608:35
OSL
-
SEA
1 stop16h 25m
Multiple Airlines
mar. 9/620:20
SEA
-
OSL
1 stop18h 00m
Multiple Airlines
Deal found 29/4£410
vie. 15/509:20
OSL
-
SEA
1 stop16h 10m
Delta
mar. 19/509:30
SEA
-
OSL
2 stops16h 35m
Delta
Deal found 29/4£413
mar. 19/513:50
OSL
-
SEA
1 stop15h 50m
Icelandair
jue. 4/615:40
SEA
-
OSL
1 stop14h 45m
Icelandair
Deal found 26/4£415
sáb. 23/516:30
OSL
-
SEA
1 stop28h 15m
Icelandair
mar. 2/619:00
SEA
-
OSL
1 stop11h 25m
Icelandair
Deal found 26/4£416
jue. 4/613:50
OSL
-
SEA
1 stop13h 05m
Icelandair
dom. 7/619:00
SEA
-
OSL
1 stop32h 35m
Icelandair
Deal found 28/4£424
sáb. 23/516:30
OSL
-
SEA
1 stop13h 10m
Icelandair
dom. 24/519:00
SEA
-
OSL
1 stop32h 35m
Icelandair
Deal found 30/4£427
mar. 19/513:50
OSL
-
SEA
1 stop15h 50m
Icelandair
vie. 5/615:40
SEA
-
OSL
1 stop11h 55m
Icelandair
Deal found 26/4£431

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 30 abril 2026.

Round-trip from

£405

One-way from

£355

Popular in

December

Cheapest in

October

Average price

£411
Delta
  • Delta
  • 16/5-1/6
  • 3 total stops
  • 34h 20m total
  • Oslo to Seattle
Search Deals
British Airways
  • British Airways
  • 23/7
  • 1 total stop
  • 24h 30m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£14 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 April 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 30 abril 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

mié. 20/5

19:15-11:42

1 stop25h 27m

Seattle/Tacoma Intl

jue. 28/5

17:40-16:20

1 stop13h 40m

£413

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

dom. 24/5

16:30-11:45

1 stop28h 15m

Seattle/Tacoma Intl

lun. 1/6

23:25-12:35

1 stop28h 10m

£417

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 4/6

13:50-17:55

1 stop13h 05m

Seattle/Tacoma Intl

dom. 7/6

19:00-12:35

1 stop32h 35m

£426

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

dom. 24/5

16:30-11:45

1 stop28h 15m

Seattle/Tacoma Intl

vie. 5/6

15:40-12:35

1 stop11h 55m

£433

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 4/6

07:45-22:32

2 stops23h 47m

Seattle/Tacoma Intl

dom. 7/6

15:05-23:40

2 stops23h 35m

£435
Fastest return journey

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

jue. 21/5

06:30-16:37

2 stops19h 07m

Seattle/Tacoma Intl

mar. 2/6

10:35-11:05

2 stops15h 30m

£462

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

vie. 22/5

06:30-17:39

1 stop20h 09m

Seattle/Tacoma Intl

dom. 24/5

09:30-11:05

2 stops16h 35m

£475

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

mar. 2/6

06:55-10:05

2 stops36h 10m

Seattle/Tacoma Intl

mar. 9/6

18:50-22:05

1 stop18h 15m

£482

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

dom. 24/5

06:25-12:20

1 stop14h 55m

Seattle/Tacoma Intl

lun. 1/6

05:50-18:20

2 stops27h 30m

£484
Cheapest one-way

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

mar. 21/7

08:35-16:00

1 stop16h 25m

£542

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

Booking 69 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 £376). Flying from Oslo Gardermoen Airport to Seattle in December is currently the most expensive (average of £560). 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 £435, KLM can have you in Seattle from Oslo Gardermoen Airport in 23h 47m. 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 £376). Flying from Oslo Gardermoen Airport to Seattle in December is currently the most expensive (average of £560). 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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How does Cheapflights help users find flights from Oslo Gardermoen to Seattle?

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Oslo Gardermoen to Seattle for you. Better yet — we are completely free to use.

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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