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$330+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This KLM deal was found by Cheapflights users on 12/17. 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.
Mon 12/293:05 pmSEA - OSL
1 stop20h 55mKLM
Tue 1/134:25 pmOSL - SEA
1 stop28h 25mKLM
Deal found 12/17$524
This Delta deal was found by Cheapflights users on 12/17. 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.
Mon 12/293:05 pmSEA - OSL
1 stop16h 10mDelta
Tue 1/139:25 amOSL - SEA
2 stops22h 00mDelta
Deal found 12/17$535
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Tue 12/1610:10 amPDX - OSL
2 stops22h 30mUnited Airlines
Tue 12/2311:50 amOSL - PDX
2 stops55h 11mUnited Airlines
Deal found 12/16$721
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Thu 12/187:00 amSEA - OSL
2 stops25h 50mUnited Airlines
Thu 12/251:45 pmOSL - SEA
2 stops27h 38mUnited Airlines
Deal found 12/17$778
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:00 pmSEA - OSL
2 stops36h 00mLufthansa
Tue 1/134:35 pmOSL - SEA
2 stops29h 45mLufthansa
Deal found 12/16$819
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/175:25 amGEG - OSL
2 stops24h 55mUnited Airlines
Wed 12/241:50 pmOSL - GEG
2 stops40h 41mUnited Airlines
Deal found 12/16$919
This Gurufare deal was found by Cheapflights users on 12/16. 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.
Tue 12/168:30 amPDX - OSL
2 stops22h 10mLufthansa
Tue 12/236:25 pmOSL - PDX
2 stops33h 23mLufthansa
Deal found 12/16$1,019
This Air France deal was found by Cheapflights users on 12/16. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1610:05 amPDX - OSL
2 stops19h 40mMultiple Airlines
Tue 12/2312:40 pmOSL - PDX
1 stop31h 45mMultiple Airlines
Deal found 12/16$1,071
This KAYAK deal was found by Cheapflights users on 12/17. 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.
Thu 12/187:00 amSEA - OSL
2 stops21h 00mLufthansa
Thu 12/256:25 pmOSL - SEA
1 stop27h 55mLufthansa
Deal found 12/17$1,287
This KAYAK deal was found by Cheapflights users on 12/17. 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.
Thu 12/184:48 pmSEA - OSL
1 stop21h 12mScandinavian Airlines
Thu 12/257:50 amOSL - SEA
1 stop16h 08mScandinavian Airlines
Deal found 12/17$1,316
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Sun 12/2111:15 pmSEA - OSL
2 stops33h 25mUnited Airlines
Fri 1/26:15 amOSL - SEA
3 stops39h 36mUnited Airlines
Deal found 12/17$1,932
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/315:45 pmPDX - OSL
1 stop19h 55mMultiple Airlines
Sat 1/38:45 amOSL - PDX
2 stops22h 14mMultiple Airlines
Deal found 12/17$1,991

Find flight deals from Washington to Oslo

Keep the following information in mind while searching for Washington to Oslo flight deals. Data was last updated December 18, 2025.

Round-trip from

$360
(Ticket)

One-way from

$330
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$666
From Washington to Oslo
Search Deals
One-way flight from Washington to Oslo
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($130 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 18, 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

Sun 2/22

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Mon 3/2

1:10 pm-5:00 pm

1 stop12h 50m

$456

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 3/1

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Thu 3/5

1:10 pm-5:00 pm

1 stop12h 50m

$456

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 2/22

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Tue 3/3

1:10 pm-5:00 pm

1 stop12h 50m

$456

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 2/18

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Sun 3/1

9:30 pm-5:00 pm

1 stop28h 30m

$457

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 2/22

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Sun 3/1

9:30 pm-5:00 pm

1 stop28h 30m

$457

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 3/16

3:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Thu 3/26

1:10 pm-6:00 pm

1 stop12h 50m

$480

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 4/19

8:20 pm-10:25 am

1 stop29h 05m

Oslo Gardermoen

Thu 4/23

11:40 am-11:35 am

1 stop32h 55m

$488

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 3/16

7:50 pm-8:00 am

2 stops28h 10m

Oslo Gardermoen

Thu 3/26

6:25 am-9:16 pm

2 stops22h 51m

$499

SpokaneOslo

GEG - OSL

GEGOSL

Spokane

Thu 1/15

6:53 am-5:40 pm

2 stops25h 47m

Oslo Gardermoen

Sun 2/1

6:05 am-7:16 pm

2 stops22h 11m

$503

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 2/18

10:56 am-11:40 pm

2 stops27h 44m

Oslo Gardermoen

Fri 2/27

9:35 am-11:19 pm

2 stops22h 44m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 44 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, January is the cheapest month in which you can book a flight from State of Washington to Oslo (average of $340). Flying from State of Washington to Oslo in June is currently the most expensive (average of $537). 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 December 18, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 34% on flights from State of Washington to Oslo by exploring options for tickets in the evening.

What is the cheapest day to fly from State of Washington to Oslo?

Use this chart to determine the cheapest time to fly round-trip from Washington to Oslo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Oslo flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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, Lufthansa, and British Airways can get you from State of Washington to Oslo in just under 12h. Your travel time can differ by up to 23h 30m. 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 ($188), Scandinavian Airlines ($287), and Lufthansa ($372).

  • 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, January is the cheapest month in which you can book a flight from State of Washington to Oslo (average of $340). Flying from State of Washington to Oslo in June is currently the most expensive (average of $537). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$354Average$606FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$403Average$549FlexibilityNo cancel feeOn-time76%
DeltaCheapest$478Average$839FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$483Average$841FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$510Average$673FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$517Average$836FlexibilityNo cancel feeOn-time69%
KLMCheapest$524Average$730FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$551Average$721FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$552Average$615FlexibilityNo cancel feeOn-time77%
FinnairCheapest$569Average$744FlexibilityNo cancel feeOn-time76%

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