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$326+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 November 6, 2025.

Round-trip from

$358
(Ticket)

One-way from

$326
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$483
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. 19% potential increase in price ($146 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 6, 2025.

This Ticket deal was found by Cheapflights users on 11/5. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:35 pmSEA - OSL
1 stop12h 00mIcelandair
Tue 12/91:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 11/5$358
This Mytrip deal was found by Cheapflights users on 11/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:45 pmPDX - OSL
1 stop11h 50mIcelandair
Sun 12/79:30 pmOSL - PDX
1 stop28h 30mIcelandair
Deal found 11/5$386
This oojo deal was found by Cheapflights users on 11/5. 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 12/62:45 pmPDX - OSL
1 stop11h 50mIcelandair
Sun 12/149:30 pmOSL - PDX
1 stop28h 30mIcelandair
Deal found 11/5$392
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:35 pmSEA - OSL
1 stop12h 00mIcelandair
Sun 12/79:30 pmOSL - SEA
1 stop28h 30mIcelandair
Deal found 11/6$395
This oojo deal was found by Cheapflights users on 11/6. 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.
Thu 12/42:35 pmSEA - OSL
1 stop12h 00mIcelandair
Mon 12/151:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 11/6$417
This oojo deal was found by Cheapflights users on 11/5. 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 11/182:45 pmPDX - OSL
1 stop11h 50mIcelandair
Sun 11/239:30 pmOSL - PDX
1 stop28h 30mIcelandair
Deal found 11/5$418
This oojo deal was found by Cheapflights users on 11/4. 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 12/22:35 pmSEA - OSL
1 stop12h 00mIcelandair
Tue 12/91:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 11/4$428
This oojo deal was found by Cheapflights users on 11/5. 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 12/52:35 pmSEA - OSL
1 stop12h 00mIcelandair
Thu 12/111:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 11/5$443
This Icelandair deal was found by Cheapflights users on 11/5. 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.
Wed 12/32:35 pmSEA - OSL
1 stop12h 00mIcelandair
Sun 12/79:30 pmOSL - SEA
1 stop28h 30mIcelandair
Deal found 11/5$446
This Ticket deal was found by Cheapflights users on 11/5. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/247:00 amSEA - OSL
2 stops23h 20mLufthansa
Tue 12/96:15 amOSL - SEA
1 stop14h 55mLufthansa
Deal found 11/5$450
This oojo deal was found by Cheapflights users on 11/5. 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 11/5$465
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/410:10 amPDX - OSL
2 stops22h 30mUnited Airlines
Thu 12/116:15 amOSL - PDX
2 stops24h 30mUnited Airlines
Deal found 11/5$521

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 November 6, 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

PortlandOslo

PDX - OSL

PDXOSL

Portland

Sat 3/7

2:45 pm-8:35 pm

1 stop20h 50m

Oslo Gardermoen

Mon 3/16

1:10 pm-6:00 pm

1 stop12h 50m

$419

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

$446

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 12/29

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Tue 1/13

1:10 pm-5:00 pm

1 stop12h 50m

$465

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 2/18

1:02 pm-6:15 pm

2 stops20h 13m

Oslo Gardermoen

Fri 2/27

12:10 pm-10:24 pm

2 stops19h 14m

$501

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 4/22

1:33 pm-4:35 pm

2 stops18h 02m

Oslo Gardermoen

Thu 4/30

12:50 pm-11:05 pm

2 stops19h 15m

$501

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 12/2

11:26 am-2:45 pm

2 stops18h 19m

Oslo Gardermoen

Tue 12/9

6:30 am-11:50 am

1 stop14h 20m

$512

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 2/18

11:10 am-2:45 pm

2 stops18h 35m

Oslo Gardermoen

Fri 2/27

6:30 am-11:25 am

1 stop13h 55m

$513

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 2/18

1:25 pm-9:00 pm

1 stop22h 35m

Oslo Gardermoen

Fri 2/27

6:30 am-11:25 am

1 stop13h 55m

$514

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 12/3

3:10 pm-5:40 pm

1 stop17h 30m

Oslo Gardermoen

Sun 12/7

6:05 am-7:16 pm

2 stops22h 11m

$515

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Fri 12/5

7:35 am-1:50 pm

2 stops21h 15m

Oslo Gardermoen

Thu 12/11

6:30 am-4:21 pm

2 stops18h 51m

$515

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 60 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 November 6, 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 Saturday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from State of Washington to Oslo?

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 Finnair can get you from State of Washington to Oslo in just under 18h 02m. Your travel time can differ by up to 2h 48m. 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 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$368Average$628FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$403Average$554FlexibilityNo cancel feeOn-time76%
DeltaCheapest$468Average$830FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$483Average$845FlexibilityNo cancel feeOn-time77%
FinnairCheapest$491Average$754FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$517Average$840FlexibilityNo cancel feeOn-time69%
KLMCheapest$524Average$763FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$551Average$746FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$552Average$615FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$564Average$673FlexibilityNo cancel feeOn-time71%

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