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$404+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Round-trip from

$467
(Flightnetwork)

One-way from

$404
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$702
From Washington to Oslo
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One-way flight from Washington to Oslo
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($267 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Booking.com deal was found by Cheapflights users on 2/19. 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.
Mon 3/243:35 pmSEA - OSL
1 stop13h 00mIcelandair
Sun 4/610:30 pmOSL - SEA
1 stop28h 20mIcelandair
Deal found 2/19$447
This Booking.com deal was found by Cheapflights users on 2/20. 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.
Tue 3/182:07 pmSEA - OSL
2 stops20h 03mBritish Airways
Wed 4/25:05 pmOSL - SEA
1 stop27h 30mBritish Airways
Deal found 2/20$523
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Tue 3/181:25 pmSEA - OSL
2 stops20h 45mAmerican Airlines
Wed 4/27:40 amOSL - SEA
1 stop19h 40mAmerican Airlines
Deal found 2/20$530
This lol.travel deal was found by Cheapflights users on 2/19. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/182:50 pmSEA - OSL
2 stops37h 20mSWISS
Wed 4/25:40 amOSL - SEA
2 stops22h 21mSWISS
Deal found 2/19$533
This Gotogate deal was found by Cheapflights users on 2/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/184:10 pmSEA - OSL
1 stop17h 45mLufthansa
Wed 4/27:15 amOSL - SEA
1 stop18h 44mLufthansa
Deal found 2/19$535
This Finnair deal was found by Cheapflights users on 2/19. 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 10/282:35 pmSEA - OSL
1 stop24h 05mMultiple Airlines
Fri 11/78:45 amOSL - SEA
2 stops19h 13mMultiple Airlines
Deal found 2/19$541
This Finnair deal was found by Cheapflights users on 2/19. 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 10/282:35 pmSEA - OSL
2 stops18h 00mFinnair
Fri 11/78:45 amOSL - SEA
2 stops19h 13mFinnair
Deal found 2/19$547
This KLM deal was found by Cheapflights users on 2/19. 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.
Wed 3/52:10 pmSEA - OSL
1 stop21h 40mKLM
Thu 3/135:00 pmOSL - SEA
1 stop27h 40mKLM
Deal found 2/19$560
This Delta deal was found by Cheapflights users on 2/19. 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 3/57:28 amSEA - OSL
2 stops19h 27mDelta
Thu 3/136:30 amOSL - SEA
1 stop14h 10mDelta
Deal found 2/19$565
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/13:35 pmSEA - OSL
2 stops17h 30mUnited Airlines
Tue 4/86:35 amOSL - SEA
3 stops23h 40mUnited Airlines
Deal found 2/19$572
This Delta deal was found by Cheapflights users on 2/20. 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.
Mon 3/312:05 pmPDX - OSL
2 stops21h 35mDelta
Wed 4/166:00 amOSL - PDX
2 stops23h 48mDelta
Deal found 2/20$584
This Orbitz deal was found by Cheapflights users on 2/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/117:30 pmPDX - OSL
1 stop34h 45mBritish Airways
Wed 4/167:40 amOSL - PDX
1 stop18h 55mBritish Airways
Deal found 2/19$587

Find flights from Washington to Oslo within your budget

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 February 20, 2025.

Fly from

Washington

Fly to

Oslo

Route

Depart

Return

Price

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 3/24

3:35 pm-12:35 pm

1 stop13h 00m

Oslo Gardermoen

Sun 4/6

10:30 pm-5:50 pm

1 stop28h 20m

$447

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 3/18

2:07 pm-6:10 pm

2 stops20h 03m

Oslo Gardermoen

Wed 4/2

5:05 pm-11:35 am

1 stop27h 30m

$523

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 3/18

1:25 pm-6:10 pm

2 stops20h 45m

Oslo Gardermoen

Wed 4/2

7:40 am-6:20 pm

1 stop19h 40m

$530

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 3/18

2:50 pm-12:10 pm

2 stops37h 20m

Oslo Gardermoen

Wed 4/2

5:40 am-7:01 pm

2 stops22h 21m

$533

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 3/18

4:10 pm-5:55 pm

1 stop17h 45m

Oslo Gardermoen

Wed 4/2

7:15 am-4:59 pm

1 stop18h 44m

$535

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 3/5

2:10 pm-8:50 pm

1 stop21h 40m

Oslo Gardermoen

Thu 3/13

5:00 pm-12:40 pm

1 stop27h 40m

$560

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 3/5

7:28 am-11:55 am

2 stops19h 27m

Oslo Gardermoen

Thu 3/13

6:30 am-12:40 pm

1 stop14h 10m

$565

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 4/1

3:35 pm-6:05 pm

2 stops17h 30m

Oslo Gardermoen

Tue 4/8

6:35 am-9:15 pm

3 stops23h 40m

$572

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 4/9

1:30 pm-11:30 pm

1 stop25h 00m

Oslo Gardermoen

Wed 4/23

1:20 pm-11:09 pm

2 stops18h 49m

$580

PortlandOslo

PDX - OSL

PDXOSL

Portland

Mon 3/31

5:10 pm-8:40 pm

2 stops18h 30m

Oslo Gardermoen

Wed 4/16

6:30 am-11:20 am

1 stop13h 50m

$584

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 46 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.

Travel insights for flights from Washington to Oslo

Get recent, data-driven insights about flights from Washington to Oslo including ideal travel times, pricing trends, and more.

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 $1,134). 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 February 20, 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 February 20, 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
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

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
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

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
1,273 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

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
1,568 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

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
1,449 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Boarding

8.2

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

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 Lufthansa ($404), Air Canada ($464), and British Airways ($478).

  • 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, 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 $1,134). 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$454Average$1,113FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$475Average$694FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$869FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$533Average$898FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$562Average$699FlexibilityNo cancel feeOn-time71%
DeltaCheapest$569Average$1,064FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$570Average$902FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$578Average$943FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$590Average$902FlexibilityNo cancel feeOn-time77%
KLMCheapest$590Average$1,055FlexibilityNo cancel feeOn-time75%
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