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$269+ Cheap flights from Washington to Oslo

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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Washington to Oslo

Keep the following information in mind while searching for Washington to Oslo flight deals. Data was last updated September 11, 2025.

Round-trip from

$395
(oojo)

One-way from

$269
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$590
From Washington to Oslo
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One-way flight from Washington to Oslo
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Highest demand for flights based on searches. 16% potential increase in price ($122 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Washington to Oslo

Cheapest flights from Washington to Oslo
Explore the most affordable flight options available from Washington to Oslo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:00 pmSEA - OSL
1 stop32h 35mIcelandair
Fri 11/71:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/11$395
This FlightHub deal was found by Cheapflights users on 9/11. 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 12/52:35 pmSEA - OSL
1 stop12h 00mIcelandair
Thu 12/111:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/11$396
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:00 pmSEA - OSL
1 stop32h 35mIcelandair
Mon 10/204:45 pmOSL - SEA
1 stop12h 55mIcelandair
Deal found 9/11$398
This Gurufare deal was found by Cheapflights users on 9/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:35 pmSEA - OSL
1 stop12h 00mIcelandair
Wed 11/191:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/9$411
This KAYAK deal was found by Cheapflights users on 9/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:35 pmSEA - OSL
1 stop21h 00mIcelandair
Thu 12/111:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/11$414
This Icelandair deal was found by Cheapflights users on 9/11. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:35 pmSEA - OSL
1 stop12h 00mIcelandair
Tue 12/91:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/11$419
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/297:00 pmSEA - OSL
1 stop32h 35mIcelandair
Mon 10/64:45 pmOSL - SEA
1 stop12h 55mIcelandair
Deal found 9/11$421
This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/283:35 pmSEA - OSL
1 stop12h 00mIcelandair
Fri 11/71:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/9$428
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:35 pmSEA - OSL
1 stop12h 00mIcelandair
Tue 1/131:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/11$429
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:00 pmSEA - OSL
1 stop32h 35mIcelandair
Sun 10/510:30 pmOSL - SEA
1 stop28h 20mIcelandair
Deal found 9/11$430
This FlightHub deal was found by Cheapflights users on 9/9. 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.
Wed 11/122:35 pmSEA - OSL
1 stop12h 00mIcelandair
Wed 11/191:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/9$433
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/113:20 pmPDX - OSL
1 stop21h 15mIcelandair
Fri 11/71:10 pmOSL - PDX
1 stop12h 50mIcelandair
Deal found 9/11$445

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Oslo 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 September 11, 2025.
Use the filters below to find and compare flights from Washington to Oslo that are best for you.

Fly from

Washington

Fly to

Oslo

Route

Depart

Return

Price

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sat 12/6

2:35 pm-8:35 pm

1 stop21h 00m

Oslo Gardermoen

Thu 12/11

1:10 pm-5:00 pm

1 stop12h 50m

$414

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Fri 12/5

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Tue 12/9

1:10 pm-5:00 pm

1 stop12h 50m

$419

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 12/2

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Thu 12/11

1:10 pm-5:00 pm

1 stop12h 50m

$456

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 12/3

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Sun 12/7

9:30 pm-5:00 pm

1 stop28h 30m

$457

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 10/15

2:10 pm-5:50 pm

2 stops18h 40m

Oslo Gardermoen

Mon 10/20

1:25 pm-10:22 pm

1 stop17h 57m

$481

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

2:40 pm-9:30 pm

1 stop22h 50m

Oslo Gardermoen

Fri 11/7

6:25 am-1:20 pm

1 stop15h 55m

$494

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 9/30

7:00 pm-3:40 pm

1 stop11h 40m

Oslo Gardermoen

Mon 10/6

4:45 pm-5:50 pm

1 stop34h 05m

$495

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

11:25 am-4:20 pm

2 stops20h 55m

Oslo Gardermoen

Fri 11/7

6:25 am-1:20 pm

1 stop15h 55m

$499

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/7

1:30 pm-4:40 pm

1 stop18h 10m

Oslo Gardermoen

Tue 10/14

6:30 am-11:50 am

1 stop14h 20m

$503

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sat 11/8

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Wed 11/19

1:10 pm-5:00 pm

1 stop12h 50m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 48 results
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Best time to book a flight from Washington to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo from Washington 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 Washington to Oslo

What is the cheapest month to book a flight from State of Washington to Oslo?

Currently, November is the cheapest month in which you can book a flight from State of Washington to Oslo (average of $567). Flying from State of Washington to Oslo in June is currently the most expensive (average of $1,005). 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 WA to OSL?

Find hourly flight availability from Washington to Oslo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from State of Washington to Oslo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Washington to Oslo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Oslo?

    Icelandair, Scandinavian Airlines, and United Airlines can get you from State of Washington to Oslo in just under 18h 40m. Your travel time can differ by up to 11h 06m. The distance from State of Washington to Oslo is about 4551 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to Oslo one-way?

    The cheapest airlines for a one-way flight from State of Washington to Oslo are Icelandair ($338), Air France ($377), and Delta ($574).

  • What are the most popular routes from State of Washington to Oslo?

    While some choose either Portland - Oslo Gardermoen or Seattle/Tacoma Intl - Oslo Sandefjord, Seattle/Tacoma Intl - Oslo Gardermoen is the most popular route from State of Washington to Oslo.

  • Can I find deals for flights from Washington to Oslo that include hotel bookings?

    Yes. In addition to deals on Washington to Oslo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Oslo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Oslo.

  • Can I find deals for business class flights from Washington to Oslo?

    Yes. Cheapflights offers flight deals from Washington to Oslo 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 State of Washington to Oslo?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to Oslo (average of $567). Flying from State of Washington to Oslo in June is currently the most expensive (average of $1,005). 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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Alternative routes for Washington to Oslo

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Washington to Oslo

Discover the top 10 airlines that operate flights from Washington to Oslo. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$410Average$560FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$475Average$647FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$734FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$494Average$727FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$517Average$840FlexibilityNo cancel feeOn-time69%
KLMCheapest$524Average$790FlexibilityNo cancel feeOn-time75%
DeltaCheapest$545Average$890FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$551Average$854FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$552Average$615FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$578Average$731FlexibilityNo cancel feeOn-time71%

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