Find flights
When to book
Airlines
FAQs

Cheap flights from Oslo Gardermoen Airport to Seattle from £267

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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
6 Apr — 13 Apr1
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 1 April 2025.

Round-trip from

£347

One-way from

£267

Popular in

August

Cheapest in

October

Average price

£385
United Airlines
  • United Airlines
  • 5/5-23/5
  • 3 total stops
  • 40h 22m total
  • Oslo to Seattle
Search Deals
3/6
  • 3/6
  • 1 total stop
  • 23h 32m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£56 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 April 2025
Search Deals

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 1 April 2025.

Mon 5/506:35OSL - SEA
2 stops22h 02mUnited Airlines
Fri 23/518:50SEA - OSL
1 stop18h 20mUnited Airlines
Deal found 31/3£347
Sun 4/508:35OSL - SEA
1 stop16h 25mFinnair
Thu 15/517:40SEA - OSL
1 stop17h 05mFinnair
Deal found 31/3£351
Tue 6/506:35OSL - SEA
1 stop14h 50mLufthansa
Fri 23/518:50SEA - OSL
1 stop18h 20mLufthansa
Deal found 31/3£366
Sat 10/517:10OSL - SEA
2 stops38h 59mBritish Airways
Mon 26/513:30SEA - OSL
1 stop25h 00mBritish Airways
Deal found 31/3£370
Mon 5/506:30OSL - SEA
2 stops20h 52mDelta
Wed 21/510:25SEA - OSL
2 stops16h 25mDelta
Deal found 31/3£377
Wed 7/513:50OSL - SEA
1 stop13h 00mIcelandair
Tue 20/519:00SEA - OSL
1 stop11h 25mIcelandair
Deal found 31/3£401
Wed 25/605:40OSL - SEA
2 stops21h 56mSWISS
Wed 23/714:50SEA - OSL
2 stops24h 05mSWISS
Deal found 31/3£500
Sat 14/606:00OSL - SEA
1 stop16h 50mScandinavian Airlines
Fri 27/616:00SEA - OSL
1 stop21h 10mScandinavian Airlines
Deal found 1/4£602
Fri 4/411:45OSL - SEA
2 stops20h 24mMultiple Airlines
Sat 12/400:59SEA - OSL
2 stops24h 36mMultiple Airlines
Deal found 1/4£1,350
Sat 3/509:55OSL - SEA
3 stops33h 33mTAP AIR PORTUGAL
Fri 16/511:35SEA - OSL
2 stops39h 25mTAP AIR PORTUGAL
Deal found 31/3£1,929
Wed 7/519:45OSL - SEA
4 stops57h 33mEthiopian Air
Fri 23/522:15SEA - OSL
4 stops49h 30mEthiopian Air
Deal found 31/3£1,954
Sun 30/1106:30OSL - SEA
1 stop14h 20mKLM
Wed 3/1214:05SEA - OSL
1 stop13h 25mKLM
Deal found 1/4£2,377

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 1 April 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 5/5

06:35-19:37

2 stops22h 02m

Seattle/Tacoma Intl

Fri 23/5

18:50-22:10

1 stop18h 20m

£347

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 4/5

08:35-16:00

1 stop16h 25m

Seattle/Tacoma Intl

Thu 15/5

17:40-19:45

1 stop17h 05m

£351

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 6/5

06:35-12:25

1 stop14h 50m

Seattle/Tacoma Intl

Fri 23/5

18:50-22:10

1 stop18h 20m

£366

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 10/5

17:10-23:09

2 stops38h 59m

Seattle/Tacoma Intl

Mon 26/5

13:30-23:30

1 stop25h 00m

£370

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 5/5

06:30-18:22

2 stops20h 52m

Seattle/Tacoma Intl

Wed 21/5

10:25-11:50

2 stops16h 25m

£377

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 7/5

13:50-17:50

1 stop13h 00m

Seattle/Tacoma Intl

Tue 20/5

19:00-15:25

1 stop11h 25m

£401

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 25/6

05:40-18:36

2 stops21h 56m

Seattle/Tacoma Intl

Wed 23/7

14:50-23:55

2 stops24h 05m

£500

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 14/6

06:00-13:50

1 stop16h 50m

Seattle/Tacoma Intl

Fri 27/6

16:00-22:10

1 stop21h 10m

£602

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 23/5

09:55-10:28

3 stops33h 33m

Seattle/Tacoma Intl

Fri 6/6

11:35-12:00

2 stops39h 25m

£1,572

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 3/5

09:55-10:28

3 stops33h 33m

Seattle/Tacoma Intl

Fri 16/5

11:35-12:00

2 stops39h 25m

£1,929

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 16 results
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?

Use this chart to determine the optimal time to book a return flight from Oslo Gardermoen to Seattle. Price data was last updated on 28 March 2025.

Booking 74 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 1 April 2025.
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,899 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Cathay Pacific
7.5
Good
841 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,572 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,615 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Oslo Gardermoen Airport to Seattle round-trip?

    United Airlines, at £347, was found to be the cheapest airline from Oslo Gardermoen Airport to Seattle.Alternate airlines flying return to your destination include Finnair and Lufthansa. United Airlines is currently priced 21% below the average price you’ll pay for this route.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at £493. United Airlines flights start at £1,018 while deals on Ethiopian Air start at £1,210 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, 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 Oslo Gardermoen Airport?

Book flights to Oslo Gardermoen Airport if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Oslo Gardermoen to Seattle?

Cheapflights helps you search for flights from Oslo Gardermoen to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.