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Cheap flights from Oslo Gardermoen Airport to Seattle from £198

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
20 Jul — 27 Jul1
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 15 July 2025.

Round-trip from

£390

One-way from

£198

Popular in

July

Cheapest in

November

Average price

£553
SWISS
  • SWISS
  • 21/8-6/9
  • 3 total stops
  • 46h 49m total
  • Oslo to Seattle
Search Deals
Finnair
  • Finnair
  • 21/8
  • 1 total stop
  • 16h 25m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£57 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 July 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 15 July 2025.

Thu 21/805:40OSL - SEA
2 stops24h 14mSWISS
Sat 6/916:20SEA - OSL
1 stop22h 35mSWISS
Deal found 14/7£390
Thu 25/1213:45OSL - SEA
2 stops34h 30mUnited Airlines
Wed 31/1214:07SEA - OSL
2 stops40h 33mUnited Airlines
Deal found 14/7£397
Thu 28/814:15OSL - SEA
1 stop30h 20mDelta
Wed 10/920:25SEA - OSL
1 stop15h 15mDelta
Deal found 13/7£415
Mon 28/706:35OSL - SEA
1 stop14h 20mLufthansa
Wed 6/818:50SEA - OSL
1 stop18h 20mLufthansa
Deal found 13/7£420
Thu 24/707:45OSL - SEA
2 stops25h 05mBritish Airways
Wed 6/814:00SEA - OSL
2 stops24h 30mBritish Airways
Deal found 13/7£634

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 15 July 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

Thu 21/8

05:40-20:54

2 stops24h 14m

Seattle/Tacoma Intl

Sat 6/9

16:20-23:55

1 stop22h 35m

£390

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 25/12

13:45-15:15

2 stops34h 30m

Seattle/Tacoma Intl

Wed 31/12

14:07-15:40

2 stops40h 33m

£397

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 28/8

14:15-11:35

1 stop30h 20m

Seattle/Tacoma Intl

Wed 10/9

20:25-20:40

1 stop15h 15m

£415

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 28/7

06:35-11:55

1 stop14h 20m

Seattle/Tacoma Intl

Wed 6/8

18:50-22:10

1 stop18h 20m

£420

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 24/7

07:45-23:50

2 stops25h 05m

Seattle/Tacoma Intl

Wed 6/8

13:30-23:30

1 stop25h 00m

£634

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 24/7

13:50-17:50

1 stop13h 00m

Seattle/Tacoma Intl

Sat 9/8

19:00-15:25

1 stop11h 25m

£648

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 27/8

11:05-10:20

3 stops32h 15m

Seattle/Tacoma Intl

Wed 3/9

11:30-19:15

3 stops22h 45m

£1,031

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 23/8

08:35-23:41

2 stops24h 06m

£241

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 10/8

20:45-16:00

1 stop28h 15m

£389

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 8/10

09:55-10:19

3 stops33h 24m

£658

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Showing 1-10 of 12 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 11 July 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?

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 15 July 2025.
Read reviews from past customers who have flown with Delta, Finnair, andSWISS from Oslo Gardermoen Airport to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,956 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,956 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,657 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Ethiopian Air
7.2
Good
790 reviews
Delta
8.0
Very Good
7,956 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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?

    SWISS, at £390, was found to be the cheapest airline from Oslo Gardermoen Airport to Seattle.Alternate airlines flying return to your destination include United Airlines and Delta. SWISS is currently priced 8% 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 Finnair, which is currently one of the cheapest options available, starting at £198. British Airways flights start at £310 while deals on TAP AIR PORTUGAL start at £658 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 Seattle?

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

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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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