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$252+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Round-trip from

$440
(Mytrip)

One-way from

$252
(Trip.com)

Popular in

June

Cheapest in

November

Average price

$594
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. 23% potential increase in price ($226 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($38 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 2, 2025.

This oojo deal was found by Cheapflights users on 3/31. 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 10/283:35 pmSEA - OSL
1 stop12h 00mIcelandair
Fri 11/71:05 pmOSL - SEA
1 stop12h 55mIcelandair
Deal found 3/31$436
This Mytrip deal was found by Cheapflights users on 4/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/44:00 pmSEA - OSL
1 stop13h 10mScandinavian Airlines
Sun 6/156:55 pmOSL - SEA
1 stop27h 55mScandinavian Airlines
Deal found 4/1$440
This Finnair deal was found by Cheapflights users on 3/31. 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 10/287:50 pmSEA - OSL
1 stop14h 20mMultiple Airlines
Fri 11/78:45 amOSL - SEA
2 stops19h 13mMultiple Airlines
Deal found 3/31$516
This SWISS deal was found by Cheapflights users on 4/1. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:00 pmSEA - OSL
2 stops43h 00mSWISS
Mon 12/151:00 pmOSL - SEA
2 stops40h 54mSWISS
Deal found 4/1$519
This Finnair deal was found by Cheapflights users on 3/31. 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 10/2810:00 amSEA - OSL
2 stops18h 30mFinnair
Fri 11/78:45 amOSL - SEA
2 stops19h 13mFinnair
Deal found 3/31$526
This United deal was found by Cheapflights users on 4/1. 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 United 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 12/1511:50 amOSL - SEA
1 stop34h 30mUnited Airlines
Deal found 4/1$529
This Lufthansa deal was found by Cheapflights users on 4/1. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:00 pmSEA - OSL
1 stop18h 35mLufthansa
Mon 12/156:45 pmOSL - SEA
1 stop27h 35mLufthansa
Deal found 4/1$541
This SmartFares deal was found by Cheapflights users on 4/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:20 pmSEA - TRF
1 stop13h 00mScandinavian Airlines
Tue 10/212:55 pmTRF - SEA
1 stop32h 05mScandinavian Airlines
Deal found 4/1$547
This Delta deal was found by Cheapflights users on 3/31. 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 10/297:55 pmSEA - OSL
1 stop14h 55mDelta
Fri 11/77:55 amOSL - SEA
1 stop19h 35mDelta
Deal found 3/31$560
This StudentUniverse deal was found by Cheapflights users on 3/31. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:01 amPDX - OSL
2 stops26h 14mFinnair
Wed 10/228:35 amOSL - PDX
2 stops19h 03mFinnair
Deal found 3/31$566
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/153:57 pmSEA - OSL
2 stops18h 18mBritish Airways
Mon 10/208:35 pmOSL - SEA
2 stops30h 45mBritish Airways
Deal found 4/1$569
This Air France deal was found by Cheapflights users on 3/31. 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.
Wed 5/146:35 pmSEA - OSL
1 stop18h 55mAir France
Thu 5/226:05 amOSL - SEA
1 stop20h 20mAir France
Deal found 3/31$571

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 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 6/4

4:00 pm-4:35 pm

1 stop15h 35m

Oslo Gardermoen

Sun 6/15

8:55 pm-1:50 pm

1 stop25h 55m

$437

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sat 4/12

3:45 pm-12:35 pm

1 stop11h 50m

Oslo Gardermoen

Sun 4/20

1:50 pm-8:40 pm

1 stop15h 50m

$484

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 5/7

5:40 pm-8:05 pm

1 stop17h 25m

Oslo Gardermoen

Wed 6/4

1:20 pm-4:00 pm

1 stop11h 40m

$557

PortlandOslo

PDX - OSL

PDXOSL

Portland

Tue 9/9

8:01 am-12:35 pm

2 stops19h 34m

Oslo Gardermoen

Tue 9/23

8:35 am-6:33 pm

2 stops18h 58m

$572

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 5/12

11:55 am-4:40 pm

2 stops19h 45m

Oslo Gardermoen

Mon 5/19

6:05 am-5:25 pm

1 stop20h 20m

$576

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 4/9

6:58 am-10:40 am

2 stops18h 42m

Oslo Gardermoen

Wed 4/23

7:40 am-6:20 pm

1 stop19h 40m

$585

PortlandOslo

PDX - OSL

PDXOSL

Portland

Wed 5/7

11:14 am-11:30 pm

2 stops27h 16m

Oslo Gardermoen

Wed 5/21

7:40 am-5:35 pm

1 stop18h 55m

$587

PortlandOslo

PDX - OSL

PDXOSL

Portland

Tue 9/9

7:25 pm-11:25 pm

1 stop19h 00m

Oslo Gardermoen

Tue 9/23

7:45 am-8:53 pm

2 stops22h 08m

$591

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 4/9

6:58 am-10:40 am

2 stops18h 42m

Oslo Gardermoen

Wed 4/23

7:40 am-9:14 pm

2 stops22h 34m

$595

SeattleOslo

SEA - TRF

SEATRF

Seattle/Tacoma Intl

Wed 6/4

4:00 pm-2:20 pm

1 stop13h 20m

Oslo Sandefjord

Sun 6/15

2:55 pm-1:50 pm

1 stop31h 55m

$608

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 51 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 $1,110). 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 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.

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 2, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair 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
7,899 reviews

Comfort

8.0

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

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
1,323 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

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.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

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
1,572 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

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.
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

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 ($365), Lufthansa ($430), and British Airways ($463).

  • 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 $1,110). 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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$449Average$1,079FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$475Average$657FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$800FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$564Average$694FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$570Average$840FlexibilityNo cancel feeOn-time69%
DeltaCheapest$573Average$1,011FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$590Average$898FlexibilityNo cancel feeOn-time77%
KLMCheapest$591Average$1,062FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$613Average$971FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$728Average$984FlexibilityNo cancel feeOn-time77%

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