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$208+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$517
(oojo)

One-way from

$208
(FlightHub)

Popular in

June

Cheapest in

November

Average price

$862
From Washington to Oslo
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One-way flight from Washington to Oslo
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($120 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This oojo deal was found by Cheapflights users on 6/12. 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.
mié. 10/153:20 pmPDX - OSL
1 stop12h 15mIcelandair
mié. 10/291:05 pmOSL - PDX
1 stop12h 55mIcelandair
Deal found 6/12$517
This Mytrip deal was found by Cheapflights users on 6/9. 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.
dom. 7/64:00 pmSEA - OSL
1 stop21h 05mScandinavian Airlines
dom. 7/138:55 pmOSL - SEA
1 stop25h 55mScandinavian Airlines
Deal found 6/9$531
This oojo deal was found by Cheapflights users on 6/10. 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.
mar. 7/153:45 pmSEA - OSL
1 stop14h 40mIcelandair
mié. 7/304:30 pmOSL - SEA
1 stop13h 10mIcelandair
Deal found 6/10$535
This United Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 8/1112:20 amSEA - OSL
2 stops26h 55mUnited Airlines
jue. 8/216:35 amOSL - SEA
1 stop14h 20mUnited Airlines
Deal found 6/12$537
This FlightHub deal was found by Cheapflights users on 6/11. 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.
dom. 7/134:00 pmSEA - TRF
1 stop11h 35mScandinavian Airlines
dom. 7/277:20 pmTRF - SEA
1 stop27h 30mScandinavian Airlines
Deal found 6/11$539
This British Airways deal was found by Cheapflights users on 6/10. 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.
mar. 9/91:30 pmSEA - OSL
1 stop24h 55mBritish Airways
mié. 10/17:40 amOSL - SEA
2 stops21h 29mBritish Airways
Deal found 6/10$541
This Delta deal was found by Cheapflights users on 6/11. 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.
lun. 7/215:35 pmSEA - OSL
1 stop30h 10mDelta
mar. 8/266:30 amOSL - SEA
2 stops18h 30mDelta
Deal found 6/11$542
This Lufthansa deal was found by Cheapflights users on 6/10. 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.
jue. 12/411:05 amSEA - OSL
2 stops21h 45mLufthansa
lun. 12/156:15 amOSL - SEA
1 stop14h 55mLufthansa
Deal found 6/10$543
This Finnair deal was found by Cheapflights users on 6/10. 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.
dom. 8/105:40 pmSEA - OSL
1 stop17h 05mFinnair
sáb. 8/238:35 amOSL - SEA
2 stops24h 05mFinnair
Deal found 6/10$548
This American Airlines deal was found by Cheapflights users on 6/12. 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.
mié. 10/157:55 amSEA - OSL
2 stops17h 45mMultiple Airlines
lun. 10/208:00 amOSL - SEA
2 stops21h 04mMultiple Airlines
Deal found 6/12$555
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/111:45 pmSEA - OSL
2 stops25h 10mSWISS
lun. 8/255:40 amOSL - SEA
2 stops22h 09mSWISS
Deal found 6/11$556
This Air Canada deal was found by Cheapflights users on 6/12. 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.
mar. 9/97:15 amSEA - OSL
2 stops23h 25mAir Canada
mié. 10/19:45 amOSL - SEA
2 stops17h 51mAir Canada
Deal found 6/12$562

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 junio 12, 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

PortlandOslo

PDX - OSL

PDXOSL

Portland

mié. 10/15

3:20 pm-12:35 pm

1 stop12h 15m

Oslo Gardermoen

mié. 10/29

1:05 pm-6:00 pm

1 stop12h 55m

$517

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

dom. 7/6

4:00 pm-10:05 pm

1 stop21h 05m

Oslo Gardermoen

dom. 7/13

8:55 pm-1:50 pm

1 stop25h 55m

$531

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

mar. 7/15

3:45 pm-3:25 pm

1 stop14h 40m

Oslo Gardermoen

mié. 7/30

4:30 pm-8:40 pm

1 stop13h 10m

$535

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

mar. 7/22

1:30 pm-4:15 pm

1 stop17h 45m

Oslo Gardermoen

mar. 8/26

7:45 am-11:40 pm

2 stops24h 55m

$536

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

lun. 8/11

12:20 am-12:15 pm

2 stops26h 55m

Oslo Gardermoen

jue. 8/21

6:35 am-11:55 am

1 stop14h 20m

$537

SeattleOslo

SEA - TRF

SEATRF

Seattle/Tacoma Intl

dom. 7/13

4:00 pm-12:35 pm

1 stop11h 35m

Oslo Sandefjord

dom. 7/27

7:20 pm-1:50 pm

1 stop27h 30m

$539

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

lun. 7/21

5:35 pm-8:45 am

1 stop30h 10m

Oslo Gardermoen

mar. 8/26

6:30 am-4:00 pm

2 stops18h 30m

$542

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

jue. 12/4

11:05 am-5:50 pm

2 stops21h 45m

Oslo Gardermoen

lun. 12/15

6:15 am-12:10 pm

1 stop14h 55m

$543

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

dom. 8/10

5:40 pm-7:45 pm

1 stop17h 05m

Oslo Gardermoen

sáb. 8/23

8:35 am-11:40 pm

2 stops24h 05m

$548

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

mié. 10/15

7:55 am-10:40 am

2 stops17h 45m

Oslo Gardermoen

lun. 10/20

8:00 am-8:04 pm

2 stops21h 04m

$555

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 58 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 $1,004). 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 junio 12, 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 junio 12, 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
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

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 ($208), Delta ($388), and SWISS ($404).

  • 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 $1,004). 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$424Average$632FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$475Average$677FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$716FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$527Average$844FlexibilityNo cancel feeOn-time77%
KLMCheapest$564Average$800FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$569Average$670FlexibilityNo cancel feeOn-time77%
DeltaCheapest$569Average$890FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$570Average$836FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$578Average$694FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$593Average$878FlexibilityNo cancel feeOn-time76%

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