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$263+ 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 26, 2025.

Round-trip from

$391
(oojo)

One-way from

$263
(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. 20% potential increase in price ($148 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($25 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 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:10 amSEA - OSL
2 stops20h 25mMultiple Airlines
Wed 12/104:35 pmOSL - SEA
1 stop28h 35mMultiple Airlines
Deal found 11/24$494
This Mytrip deal was found by Cheapflights users on 11/26. 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.
Wed 11/268:10 amSEA - OSL
2 stops24h 30mMultiple Airlines
Wed 12/38:40 pmOSL - SEA
2 stops24h 30mMultiple Airlines
Deal found 11/26$509
This Delta deal was found by Cheapflights users on 11/23. 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 12/21:40 pmSEA - OSL
1 stop17h 40mDelta
Mon 12/86:25 amOSL - SEA
1 stop16h 00mDelta
Deal found 11/23$518
This Delta deal was found by Cheapflights users on 11/23. 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 12/21:40 pmSEA - OSL
1 stop17h 40mDelta
Tue 12/96:25 amOSL - SEA
1 stop14h 00mDelta
Deal found 11/23$519
This Delta deal was found by Cheapflights users on 11/23. 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 12/21:40 pmSEA - OSL
1 stop17h 40mDelta
Sun 12/79:25 amOSL - SEA
1 stop35h 25mDelta
Deal found 11/23$520
This Delta deal was found by Cheapflights users on 11/23. 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.
Wed 12/310:25 amSEA - OSL
2 stops20h 55mDelta
Thu 12/116:25 amOSL - SEA
1 stop14h 00mDelta
Deal found 11/23$523
This Air Canada deal was found by Cheapflights users on 11/23. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:10 amSEA - OSL
2 stops43h 00mAir Canada
Sun 12/76:05 amOSL - SEA
2 stops36h 26mAir Canada
Deal found 11/23$524
This Air France deal was found by Cheapflights users on 11/24. 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.
Mon 12/82:05 pmSEA - OSL
1 stop24h 30mAir France
Mon 12/223:15 pmOSL - SEA
1 stop29h 10mAir France
Deal found 11/24$527
This Delta deal was found by Cheapflights users on 11/24. 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 12/21:40 pmSEA - OSL
1 stop17h 40mDelta
Thu 12/116:25 amOSL - SEA
2 stops24h 58mDelta
Deal found 11/24$528
This United Airlines deal was found by Cheapflights users on 11/24. 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 12/312:36 pmSEA - OSL
2 stops20h 04mUnited Airlines
Mon 12/156:15 amOSL - SEA
2 stops26h 00mUnited Airlines
Deal found 11/24$529
This Delta deal was found by Cheapflights users on 11/24. 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 12/21:40 pmSEA - OSL
1 stop17h 40mDelta
Sun 12/149:50 amOSL - SEA
2 stops38h 09mDelta
Deal found 11/24$530
This KLM deal was found by Cheapflights users on 11/26. 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.
Fri 12/51:25 pmPDX - OSL
1 stop14h 15mKLM
Thu 12/115:00 pmOSL - PDX
1 stop27h 25mKLM
Deal found 11/26$556

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 26, 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

Tue 5/5

2:00 pm-5:20 pm

2 stops18h 20m

Oslo Gardermoen

Thu 5/21

9:00 pm-1:45 pm

1 stop25h 45m

$418

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Fri 5/15

7:00 pm-3:25 pm

1 stop11h 25m

Oslo Gardermoen

Mon 5/25

4:30 pm-11:35 am

1 stop28h 05m

$453

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 2/23

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

Fri 2/27

1:10 pm-5:00 pm

1 stop12h 50m

$455

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 1/20

6:50 pm-10:40 pm

1 stop18h 50m

Oslo Gardermoen

Tue 1/27

8:50 pm-9:47 pm

2 stops33h 57m

$460

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 2/18

5:45 pm-7:30 am

2 stops28h 45m

Oslo Gardermoen

Fri 2/27

8:15 am-11:05 pm

2 stops23h 50m

$467

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 3/1

10:44 am-8:10 pm

2 stops24h 26m

Oslo Gardermoen

Tue 3/24

6:25 am-8:20 pm

2 stops21h 55m

$476

PortlandOslo

PDX - OSL

PDXOSL

Portland

Thu 3/26

3:45 pm-11:35 am

1 stop11h 50m

Oslo Gardermoen

Sat 4/4

4:30 pm-6:00 pm

1 stop34h 30m

$486

PortlandOslo

PDX - OSL

PDXOSL

Portland

Sun 1/11

5:45 pm-10:40 pm

1 stop19h 55m

Oslo Gardermoen

Sat 1/24

6:30 pm-3:55 pm

1 stop30h 25m

$488

PortlandOslo

PDX - OSL

PDXOSL

Portland

Sun 1/11

5:45 pm-7:50 am

2 stops29h 05m

Oslo Gardermoen

Sat 1/24

8:45 am-7:02 pm

2 stops19h 17m

$492

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 2/18

11:15 am-2:45 pm

2 stops18h 30m

Oslo Gardermoen

Fri 2/27

6:30 am-11:25 am

1 stop13h 55m

$499

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

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 $339). 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 26, 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 Thursday at noon 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?

    Scandinavian Airlines, Icelandair, and British Airways can get you from State of Washington to Oslo in just under 11h 25m. Your travel time can differ by up to 8h 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 ($358), Lufthansa ($366), and British Airways ($368).

  • 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 $339). 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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$354Average$616FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$402Average$550FlexibilityNo cancel feeOn-time76%
DeltaCheapest$478Average$837FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$483Average$844FlexibilityNo cancel feeOn-time77%
FinnairCheapest$491Average$741FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$517Average$840FlexibilityNo cancel feeOn-time69%
KLMCheapest$524Average$730FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$551Average$739FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$552Average$615FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$564Average$673FlexibilityNo cancel feeOn-time71%

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