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$356+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Round-trip from

$426
(oojo)

One-way from

$356
(Gotogate)

Popular in

June

Cheapest in

November

Average price

$583
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. 21% potential increase in price ($190 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 24, 2025.

This oojo deal was found by Cheapflights users on 4/22. 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 8/117:00 pmSEA - OSL
1 stop11h 25mIcelandair
Mon 8/254:30 pmOSL - SEA
1 stop13h 10mIcelandair
Deal found 4/22$425
This FlightHub deal was found by Cheapflights users on 4/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/244:00 pmSEA - OSL
1 stop19h 15mScandinavian Airlines
Sun 9/77:55 pmOSL - SEA
1 stop26h 55mScandinavian Airlines
Deal found 4/23$438
This FlightHub deal was found by Cheapflights users on 4/22. 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.
Tue 10/284:10 pmSEA - OSL
1 stop17h 45mMultiple Airlines
Fri 11/76:20 amOSL - SEA
2 stops24h 35mMultiple Airlines
Deal found 4/22$533
This Air Canada deal was found by Cheapflights users on 4/22. 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.
Tue 10/2811:35 amSEA - OSL
2 stops40h 35mAir Canada
Fri 11/76:20 amOSL - SEA
2 stops24h 35mAir Canada
Deal found 4/22$539
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1111:20 pmSEA - OSL
2 stops32h 55mUnited Airlines
Mon 8/257:15 amOSL - SEA
2 stops44h 34mUnited Airlines
Deal found 4/23$540
This FlightHub deal was found by Cheapflights users on 4/22. 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.
Tue 10/284:10 pmSEA - OSL
1 stop17h 45mLufthansa
Fri 11/76:00 amOSL - SEA
1 stop16h 20mLufthansa
Deal found 4/22$544
This American Airlines deal was found by Cheapflights users on 4/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/111:30 pmSEA - OSL
1 stop25h 00mAmerican Airlines
Fri 8/221:10 pmOSL - SEA
2 stops20h 34mAmerican Airlines
Deal found 4/23$554
This British Airways deal was found by Cheapflights users on 4/23. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:46 amSEA - OSL
2 stops19h 29mBritish Airways
Fri 11/78:45 amOSL - SEA
2 stops19h 13mBritish Airways
Deal found 4/23$560
This oojo deal was found by Cheapflights users on 4/23. 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 oojo 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 4/23$562
This SWISS deal was found by Cheapflights users on 4/22. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/14:25 pmSEA - OSL
1 stop22h 30mSWISS
Wed 9/105:40 amOSL - SEA
2 stops21h 56mSWISS
Deal found 4/22$571
This Delta deal was found by Cheapflights users on 4/22. 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 9/31:30 pmSEA - OSL
2 stops20h 05mDelta
Wed 9/106:00 amOSL - SEA
1 stop20h 40mDelta
Deal found 4/22$588
This Scandinavian Airlines deal was found by Cheapflights users on 4/22. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/314:00 pmSEA - TRF
1 stop13h 20mScandinavian Airlines
Tue 9/92:55 pmTRF - SEA
1 stop31h 55mScandinavian Airlines
Deal found 4/22$594

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 April 24, 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 5/17

7:00 pm-12:35 pm

1 stop32h 35m

Oslo Gardermoen

Fri 5/23

4:30 pm-8:40 pm

1 stop13h 10m

$502

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

$562

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 5/25

4:00 pm-10:10 pm

1 stop21h 10m

Oslo Gardermoen

Tue 6/10

8:55 pm-1:50 pm

1 stop25h 55m

$570

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 5/12

5:30 am-6:05 pm

2 stops27h 35m

Oslo Gardermoen

Mon 5/19

5:40 am-7:37 pm

2 stops22h 57m

$573

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 5/12

5:30 am-6:05 pm

2 stops27h 35m

Oslo Gardermoen

Mon 5/19

6:35 am-12:25 pm

1 stop14h 50m

$598

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 5/12

2:15 pm-3:40 pm

1 stop16h 25m

Oslo Gardermoen

Mon 5/19

6:35 am-12:25 pm

1 stop14h 50m

$620

SeattleOslo

SEA - TRF

SEATRF

Seattle/Tacoma Intl

Wed 6/25

4:00 pm-2:20 pm

1 stop13h 20m

Oslo Sandefjord

Sun 7/13

7:20 pm-1:50 pm

1 stop27h 30m

$620

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 5/25

7:25 am-11:05 am

2 stops18h 40m

Oslo Gardermoen

Tue 6/10

6:30 am-11:40 am

1 stop14h 10m

$624

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 9/10

1:00 pm-5:20 pm

2 stops19h 20m

Oslo Gardermoen

Tue 9/23

11:05 am-10:20 pm

2 stops20h 15m

$646

PortlandOslo

PDX - OSL

PDXOSL

Portland

Sun 9/28

7:40 pm-1:05 pm

2 stops56h 25m

Oslo Gardermoen

Fri 10/17

9:50 am-9:21 am

2 stops32h 31m

$657

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 52 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 $1,101). 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 April 24, 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.

Rainfall in Oslo by month

Plan your trip to Oslo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Oslo ranges from 1.6 - 3.5 inches per month. August is typically the wettest month, when rainfall can reach 3.5 in. February is typically the driest time to visit Oslo when rainfall is around 1.6 in.

Temperature in Oslo by month

Plan your trip to Oslo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Oslo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

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 April 24, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and SWISS from Washington to Oslo to help guide your decision. 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
7,920 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,582 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,685 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Scandinavian Airlines
7.3
Good
1,344 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 ($356), Delta ($461), and Air Canada ($474).

  • 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 $1,101). 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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$446Average$1,051FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$473Average$662FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$781FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$494Average$899FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$563Average$912FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$564Average$694FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$570Average$836FlexibilityNo cancel feeOn-time69%
DeltaCheapest$573Average$996FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$584Average$1,048FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$590Average$885FlexibilityNo cancel feeOn-time77%

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