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$441+ Cheap flights from Oslo Gardermoen (OSL) to Seattle (SEA)

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — SEA
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Oslo Gardermoen to Seattle/Tacoma Intl are usually found in November or October, booked 74 days in advance, depart on a Saturday or Friday and return on a Tuesday

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 July 3, 2025.

Round-trip from

$537
(Lufthansa)

One-way from

$441
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$729
From Oslo Gardermoen to Seattle/Tacoma Intl
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One-way flight from Oslo Gardermoen to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 16% potential increase in price ($116 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Lufthansa deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:50 amOSL - SEA
2 stops22h 52mLufthansa
Sun 8/312:20 pmSEA - OSL
1 stop18h 40mLufthansa
Deal found 7/2$537
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:35 amOSL - SEA
2 stops25h 24mUnited Airlines
Sat 8/237:00 amSEA - OSL
2 stops25h 15mUnited Airlines
Deal found 7/2$541
This SWISS deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/225:40 amOSL - SEA
2 stops24h 14mSWISS
Mon 9/110:00 amSEA - OSL
2 stops42h 05mSWISS
Deal found 7/2$542
This KLM deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/209:20 amOSL - SEA
1 stop15h 35mKLM
Mon 9/15:40 pmSEA - OSL
1 stop13h 40mKLM
Deal found 7/2$543
This Booking.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1711:35 amOSL - SEA
2 stops19h 41mAir Canada
Sun 10/197:30 amSEA - OSL
2 stops22h 15mAir Canada
Deal found 7/1$545
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/192:15 pmOSL - SEA
2 stops37h 45mDelta
Mon 9/17:13 amSEA - OSL
2 stops28h 27mDelta
Deal found 7/2$557
This Scandinavian Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/168:55 pmOSL - SEA
1 stop25h 55mScandinavian Airlines
Sat 8/231:30 pmSEA - OSL
2 stops18h 50mScandinavian Airlines
Deal found 7/2$569
This American Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/287:45 amOSL - SEA
1 stop19h 35mAmerican Airlines
Wed 9/108:20 pmSEA - OSL
1 stop18h 10mAmerican Airlines
Deal found 7/3$571
This Flysmarter deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/77:45 amOSL - SEA
2 stops21h 17mBritish Airways
Sun 8/173:09 pmSEA - OSL
2 stops23h 31mBritish Airways
Deal found 7/1$582
This Orbitz deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/215:40 amOSL - SEA
1 stop18h 15mMultiple Airlines
Mon 7/2810:00 amSEA - OSL
2 stops20h 40mMultiple Airlines
Deal found 7/3$611
This Travelis deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/78:35 amOSL - SEA
1 stop16h 25mFinnair
Sun 8/175:40 pmSEA - OSL
1 stop17h 05mFinnair
Deal found 7/1$612
This FlightHub deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/224:30 pmOSL - SEA
1 stop27h 55mIcelandair
Sat 8/303:45 pmSEA - OSL
1 stop14h 40mIcelandair
Deal found 7/2$625

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated July 3, 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

Wed 8/20

6:50 am-8:42 pm

2 stops22h 52m

Seattle/Tacoma Intl

Sun 8/31

2:20 pm-6:00 pm

1 stop18h 40m

$537

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 8/16

6:35 am-10:59 pm

2 stops25h 24m

Seattle/Tacoma Intl

Sat 8/23

7:00 am-5:15 pm

2 stops25h 15m

$541

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 8/22

5:40 am-8:54 pm

2 stops24h 14m

Seattle/Tacoma Intl

Mon 9/1

10:00 am-1:05 pm

2 stops42h 05m

$542

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Wed 8/20

9:20 am-3:55 pm

1 stop15h 35m

Seattle/Tacoma Intl

Mon 9/1

5:40 pm-4:20 pm

1 stop13h 40m

$543

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Fri 10/17

11:35 am-10:16 pm

2 stops19h 41m

Seattle/Tacoma Intl

Sun 10/19

7:30 am-2:45 pm

2 stops22h 15m

$545

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Tue 8/19

2:15 pm-7:00 pm

2 stops37h 45m

Seattle/Tacoma Intl

Mon 9/1

7:13 am-8:40 pm

2 stops28h 27m

$557

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Sat 8/16

8:55 pm-1:50 pm

1 stop25h 55m

Seattle/Tacoma Intl

Sat 8/23

1:30 pm-5:20 pm

2 stops18h 50m

$569

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 8/28

7:45 am-6:20 pm

1 stop19h 35m

Seattle/Tacoma Intl

Wed 9/10

8:20 pm-11:30 pm

1 stop18h 10m

$571

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 8/7

7:45 am-8:02 pm

2 stops21h 17m

Seattle/Tacoma Intl

Sun 8/17

3:09 pm-11:40 pm

2 stops23h 31m

$582

OsloSeattle

OSL - SEA

OSLSEA

Oslo Gardermoen

Thu 8/7

8:35 am-4:00 pm

1 stop16h 25m

Seattle/Tacoma Intl

Sun 8/17

5:40 pm-7:45 pm

1 stop17h 05m

$612

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 20 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 round-trip 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 round-trip flight from Oslo Gardermoen to Seattle. Price data was last updated on June 27, 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 $238). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of $390). 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.

What is the cheapest time of day to fly from OSL to SEA?

Find hourly flight availability from Oslo Gardermoen to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

It’s typically best to fly out from Oslo Gardermoen Airport to Seattle at noon. Doing so could potentially save you 20% on the flight price compared to flying in the morning, which is usually more expensive.

How much does it cost to fly round-trip 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 July 3, 2025.
See what other customers who have flown with Delta, KLM, and Finnair from Oslo Gardermoen Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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) is the airport you will fly into if you book a flight from Oslo Gardermoen to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Oslo Gardermoen; the airport handles an average of 0 inbound flights from Oslo Gardermoen per day. You should also have plenty of airline options to choose from since 7 airlines have flights to the Seattle airport from Oslo Gardermoen. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

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

    Flying on Lufthansa is currently your cheapest option to Seattle, with prices starting at $537. Additional round-trip tickets that might be worth considering are offered by United Airlines and SWISS, with the lowest prices starting at $541 and $542, respectively. Users have found that Lufthansa is 6% cheaper than the other options available to this destination.

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

    The cheapest airlines for a one-way flight from Oslo Gardermoen Airport to Seattle are Lufthansa ($460), Icelandair ($465), and SWISS ($525).

  • 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 vacation 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 $238). Flying from Oslo Gardermoen Airport to Seattle in July is currently the most expensive (average of $390). 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

Traveling to a place near Oslo Gardermoen Airport?

Book flights to Oslo Gardermoen Airport if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Federal Way
Chehalis
Kirkland
Aberdeen
Shelton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Oslo Gardermoen to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Sandefjord to Seattle flights
Oslo Gardermoen to Portland flights
Sandefjord to Portland flights

Top 7 airlines flying from Oslo Gardermoen to Seattle

Discover the top 7 airlines that operate flights from Oslo Gardermoen to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$399Average$493FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$416Average$490FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$419Average$605FlexibilityNo cancel feeOn-time70%
FinnairCheapest$422Average$450FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$423Average$558FlexibilityNo cancel feeOn-time76%
DeltaCheapest$452Average$534FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$603Average$703FlexibilityNo cancel feeOn-time77%

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