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Cheap flights from Oslo Gardermoen Airport to Seattle from £366

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
6 May — 13 May1
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 May 2025.

Round-trip from

£366

Popular in

July

Cheapest in

October

Average price

£367
Lufthansa
  • Lufthansa
  • 30/5-2/1
  • 2 total stops
  • 37h 44m total
  • Oslo to Seattle
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£76 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 May 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 1 May 2025.

Fri 30/511:35OSL - SEA
1 stop14h 24mLufthansa
Fri 2/115:10SEA - OSL
1 stop23h 20mLufthansa
Deal found 30/4£366
Mon 9/611:50OSL - SEA
2 stops21h 03mDelta
Mon 16/614:10SEA - OSL
1 stop19h 25mDelta
Deal found 30/4£381
Wed 16/708:35OSL - SEA
1 stop16h 25mFinnair
Sun 3/817:40SEA - OSL
1 stop13h 55mFinnair
Deal found 30/4£401
Sun 27/706:50OSL - SEA
2 stops26h 09mUnited Airlines
Fri 8/823:20SEA - OSL
2 stops24h 40mUnited Airlines
Deal found 30/4£403
Sat 14/606:30OSL - SEA
1 stop14h 10mKLM
Sat 21/614:10SEA - OSL
1 stop19h 55mKLM
Deal found 30/4£423
Tue 15/707:45OSL - SEA
1 stop19h 35mBritish Airways
Wed 23/713:30SEA - OSL
1 stop25h 00mBritish Airways
Deal found 30/4£460
Tue 15/705:40OSL - SEA
2 stops22h 18mSWISS
Wed 23/713:45SEA - OSL
2 stops25h 10mSWISS
Deal found 30/4£542
Fri 18/709:00OSL - SEA
1 stop13h 50mScandinavian Airlines
Fri 1/816:00SEA - OSL
1 stop11h 55mScandinavian Airlines
Deal found 30/4£614
Thu 17/713:50OSL - SEA
1 stop13h 00mIcelandair
Mon 4/815:45SEA - OSL
1 stop11h 50mIcelandair
Deal found 30/4£628
Tue 20/518:50OSL - SEA
2 stops48h 38mTAP AIR PORTUGAL
Wed 2/711:30SEA - OSL
3 stops22h 35mTAP AIR PORTUGAL
Deal found 30/4£1,519
Mon 14/719:45OSL - SEA
4 stops53h 08mEthiopian Air
Mon 28/722:05SEA - OSL
3 stops49h 40mEthiopian Air
Deal found 30/4£2,146
Fri 30/509:55OSL - SEA
3 stops33h 33mMultiple Airlines
Fri 2/107:12SEA - OSL
3 stops24h 28mMultiple Airlines
Deal found 30/4£2,611

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 May 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

Fri 30/5

11:35-16:59

1 stop14h 24m

Seattle/Tacoma Intl

Fri 2/1

15:10-23:30

1 stop23h 20m

£366

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Mon 9/6

11:50-23:53

2 stops21h 03m

Seattle/Tacoma Intl

Mon 16/6

14:10-18:35

1 stop19h 25m

£381

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 16/7

08:35-16:00

1 stop16h 25m

Seattle/Tacoma Intl

Sun 3/8

17:40-16:35

1 stop13h 55m

£401

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sun 27/7

06:50-23:59

2 stops26h 09m

Seattle/Tacoma Intl

Fri 8/8

23:20-09:00

2 stops24h 40m

£403

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 14/6

06:30-11:40

1 stop14h 10m

Seattle/Tacoma Intl

Sat 21/6

14:10-19:05

1 stop19h 55m

£423

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 15/7

07:45-18:20

1 stop19h 35m

Seattle/Tacoma Intl

Wed 23/7

13:30-23:30

1 stop25h 00m

£460

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 15/7

05:40-18:58

2 stops22h 18m

Seattle/Tacoma Intl

Wed 23/7

13:45-23:55

2 stops25h 10m

£542

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 18/7

09:00-13:50

1 stop13h 50m

Seattle/Tacoma Intl

Wed 30/7

16:00-12:55

1 stop11h 55m

£614

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 17/7

13:50-17:50

1 stop13h 00m

Seattle/Tacoma Intl

Mon 4/8

15:45-12:35

1 stop11h 50m

£628

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 20/5

18:50-10:28

2 stops48h 38m

Seattle/Tacoma Intl

Wed 2/7

11:30-19:05

3 stops22h 35m

£1,519

Flights are sorted by cheapest return flights first.

Deals found on 30/4

Showing 1-10 of 18 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 25 April 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 May 2025.
Delta
8.0
Very Good
7,934 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,934 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
1,275 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
855 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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
1,588 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

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?

    Lufthansa, at £366, was found to be the cheapest airline from Oslo Gardermoen Airport to Seattle.Alternate airlines flying return to your destination include Delta and Finnair. Lufthansa is currently priced 15% 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 Icelandair, which is currently one of the cheapest options available, starting at £980. United Airlines flights start at £1,006 while deals on Ethiopian Air start at £1,189 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

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