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$166+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$431
(Booking.com)

One-way from

$177
(FlightHub)

Popular in

June

Cheapest in

November

Average price

$763
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. 13% potential increase in price ($103 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 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 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 July 2, 2025.

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.
Wed 8/203:45 pmSEA - OSL
1 stop11h 50mIcelandair
Sun 8/314:30 pmOSL - SEA
1 stop27h 55mIcelandair
Deal found 7/1$431
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/153:20 pmPDX - OSL
1 stop12h 15mIcelandair
Mon 10/204:45 pmOSL - PDX
1 stop34h 10mIcelandair
Deal found 7/1$441
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:32 amSEA - OSL
2 stops25h 38mFinnair
Fri 11/78:25 amOSL - SEA
2 stops19h 33mFinnair
Deal found 7/2$475
This oojo deal was found by Cheapflights users on 6/30. 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.
Sun 8/104:00 pmSEA - OSL
1 stop11h 55mScandinavian Airlines
Sun 8/177:55 pmOSL - SEA
1 stop26h 55mScandinavian Airlines
Deal found 6/30$476
This British Airways deal was found by Cheapflights users on 6/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/282:35 pmSEA - OSL
1 stop15h 40mBritish Airways
Fri 11/711:40 amOSL - SEA
1 stop14h 15mBritish Airways
Deal found 6/30$478
This American Airlines deal was found by Cheapflights users on 6/30. 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 11/125:47 pmSEA - OSL
2 stops19h 53mMultiple Airlines
Thu 11/277:00 amOSL - SEA
2 stops21h 05mMultiple Airlines
Deal found 6/30$483
This Air France deal was found by Cheapflights users on 6/30. 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 8/116:40 pmSEA - OSL
1 stop18h 50mAir France
Fri 8/228:25 amOSL - SEA
1 stop18h 10mAir France
Deal found 6/30$494
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/201:30 pmSEA - OSL
1 stop25h 00mAmerican Airlines
Wed 8/271:20 pmOSL - SEA
2 stops19h 21mAmerican Airlines
Deal found 7/1$497
This Delta deal was found by Cheapflights users on 6/30. 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 10/2811:20 amSEA - OSL
2 stops21h 05mDelta
Fri 11/76:20 amOSL - SEA
1 stop15h 55mDelta
Deal found 6/30$499
This Air Canada deal was found by Cheapflights users on 6/30. 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.
Sun 10/2610:05 amSEA - OSL
2 stops23h 40mAir Canada
Mon 11/311:50 amOSL - SEA
2 stops43h 16mAir Canada
Deal found 6/30$500
This United Airlines deal was found by Cheapflights users on 6/30. 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 12/411:05 amSEA - OSL
2 stops21h 05mUnited Airlines
Mon 12/159:35 amOSL - SEA
2 stops22h 03mUnited Airlines
Deal found 6/30$532
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.
Wed 10/1510:00 amPDX - OSL
2 stops24h 15mScandinavian Airlines
Mon 10/204:10 pmOSL - PDX
2 stops39h 10mScandinavian Airlines
Deal found 7/2$599

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 July 2, 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

Wed 8/20

3:45 pm-12:35 pm

1 stop11h 50m

Oslo Gardermoen

Sun 8/31

4:30 pm-11:25 am

1 stop27h 55m

$431

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 10/15

3:20 pm-12:35 pm

1 stop12h 15m

Oslo Gardermoen

Mon 10/20

4:45 pm-5:55 pm

1 stop34h 10m

$441

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

10:32 am-4:35 pm

2 stops22h 03m

Oslo Gardermoen

Fri 11/7

8:25 am-6:58 pm

2 stops19h 33m

$475

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 8/10

4:00 pm-12:55 pm

1 stop11h 55m

Oslo Gardermoen

Sun 8/17

7:55 pm-1:50 pm

1 stop26h 55m

$476

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

2:35 pm-2:15 pm

1 stop15h 40m

Oslo Gardermoen

Fri 11/7

11:40 am-4:55 pm

1 stop14h 15m

$478

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 11/12

5:47 pm-10:40 pm

2 stops19h 53m

Oslo Gardermoen

Thu 11/27

7:00 am-7:05 pm

2 stops21h 05m

$483

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 8/11

6:40 pm-10:30 pm

1 stop18h 50m

Oslo Gardermoen

Fri 8/22

8:25 am-5:35 pm

1 stop18h 10m

$494

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 8/20

1:30 pm-11:30 pm

1 stop25h 00m

Oslo Gardermoen

Wed 8/27

1:20 pm-11:41 pm

2 stops19h 21m

$497

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

11:20 am-4:25 pm

2 stops21h 05m

Oslo Gardermoen

Fri 11/7

6:20 am-1:15 pm

1 stop15h 55m

$499

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 10/26

10:05 am-5:45 pm

2 stops23h 40m

Oslo Gardermoen

Mon 11/3

11:50 am-10:06 pm

2 stops43h 16m

$500

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 40 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 $1,012). 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 July 2, 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.

Reviews of airlines servicing Oslo

Get insights into the airlines that provide service to Oslo. 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 Oslo. Reviews last updated July 2, 2025.
Read through reviews of airlines operating flights from Washington to Oslo, such as Delta, KLM, and Finnair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

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
1,366 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

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
1,301 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

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!
Air France
7.5
Good
1,472 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

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
7,983 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

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 Washington to Oslo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 ($177), British Airways ($384), and Delta ($393).

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

    While some choose either Seattle/Tacoma Intl - Oslo Sandefjord or Portland - Oslo Gardermoen, 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 $1,012). 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$426Average$622FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$475Average$672FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$716FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$494Average$759FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$517Average$835FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$563Average$867FlexibilityNo cancel feeOn-time76%
KLMCheapest$564Average$787FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$569Average$639FlexibilityNo cancel feeOn-time77%
DeltaCheapest$569Average$892FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$578Average$694FlexibilityNo cancel feeOn-time71%

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