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$320+ Cheap flights from Seattle (SEA) 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Oslo are usually found in October or November, booked 76 days in advance, depart on a Tuesday or Monday and return on a Saturday

Cheap flight deals from Seattle to Oslo

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Oslo (OS1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 16, 2025.

Round-trip from

$376
(Ticket)

One-way from

$320
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$580
From Seattle/Tacoma Intl to Oslo
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One-way flight from Seattle/Tacoma Intl to Oslo
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Highest demand for flights based on searches. 17% potential increase in price ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Oslo

Cheapest flights from Seattle to Oslo
Explore the most affordable flight options available from Seattle to Oslo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 16, 2025.

This Ticket deal was found by Cheapflights users on 9/14. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/197:00 pmSEA - OSL
1 stop11h 45mIcelandair
mar. 11/41:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/14$376
This oojo deal was found by Cheapflights users on 9/15. 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.
sáb. 12/62:35 pmSEA - OSL
1 stop12h 00mIcelandair
vie. 12/121:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/15$394
This oojo deal was found by Cheapflights users on 9/13. 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.
sáb. 11/13:35 pmSEA - OSL
1 stop12h 00mIcelandair
dom. 11/169:30 pmOSL - SEA
1 stop28h 30mIcelandair
Deal found 9/13$396
This oojo deal was found by Cheapflights users on 9/14. 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.
dom. 10/123:45 pmSEA - OSL
1 stop11h 50mIcelandair
dom. 10/191:50 pmOSL - SEA
1 stop15h 50mIcelandair
Deal found 9/14$397
This oojo deal was found by Cheapflights users on 9/14. 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. 10/157:00 pmSEA - OSL
1 stop32h 35mIcelandair
lun. 10/204:45 pmOSL - SEA
1 stop12h 55mIcelandair
Deal found 9/14$399
This oojo deal was found by Cheapflights users on 9/15. 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. 9/237:00 pmSEA - OSL
1 stop11h 25mIcelandair
mié. 10/224:30 pmOSL - SEA
1 stop13h 10mIcelandair
Deal found 9/15$406
This oojo deal was found by Cheapflights users on 9/14. 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. 9/247:00 pmSEA - OSL
1 stop32h 35mIcelandair
dom. 10/510:30 pmOSL - SEA
1 stop31h 10mIcelandair
Deal found 9/14$409
This Gurufare deal was found by Cheapflights users on 9/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/62:35 pmSEA - OSL
1 stop21h 00mIcelandair
jue. 12/111:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/14$412
This Icelandair deal was found by Cheapflights users on 9/14. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/52:35 pmSEA - OSL
1 stop12h 00mIcelandair
mar. 12/91:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/14$419
This Gurufare deal was found by Cheapflights users on 9/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/72:35 pmSEA - OSL
1 stop12h 00mIcelandair
jue. 12/111:10 pmOSL - SEA
1 stop12h 50mIcelandair
Deal found 9/14$420
This Mytrip deal was found by Cheapflights users on 9/15. 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.
mié. 10/157:00 pmSEA - TRF
3 stops34h 20mMultiple Airlines
lun. 10/202:55 pmTRF - SEA
3 stops35h 55mMultiple Airlines
Deal found 9/15$874
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/194:20 pmSEA - TRF
1 stop13h 00mMultiple Airlines
mar. 11/48:00 pmTRF - SEA
2 stops33h 13mMultiple Airlines
Deal found 9/14$1,032

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 septiembre 16, 2025.
Use the filters below to find and compare flights from Seattle to Oslo that are best for you.

Fly from

Seattle

Fly to

Oslo

Route

Depart

Return

Price

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

vie. 1/23

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

mar. 2/3

1:10 pm-5:00 pm

1 stop12h 50m

$420

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

jue. 1/29

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

mar. 2/3

1:10 pm-5:00 pm

1 stop12h 50m

$420

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

vie. 1/23

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

mié. 2/4

1:10 pm-5:00 pm

1 stop12h 50m

$420

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

jue. 1/29

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

vie. 2/6

1:10 pm-5:00 pm

1 stop12h 50m

$420

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

jue. 1/29

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

lun. 2/2

1:10 pm-5:00 pm

1 stop12h 50m

$420

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

vie. 1/23

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

jue. 2/5

1:10 pm-5:00 pm

1 stop12h 50m

$420

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

sáb. 1/24

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

dom. 2/1

9:30 pm-5:00 pm

1 stop28h 30m

$422

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

jue. 1/29

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

sáb. 2/7

1:10 pm-5:00 pm

1 stop12h 50m

$428

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

vie. 1/23

2:35 pm-11:35 am

1 stop12h 00m

Oslo Gardermoen

sáb. 2/7

1:10 pm-5:00 pm

1 stop12h 50m

$428

SeattleOslo

SEA - TRF

SEATRF

Seattle/Tacoma Intl

mié. 10/15

7:00 pm-2:20 pm

3 stops34h 20m

Oslo Sandefjord

lun. 10/20

2:55 pm-5:50 pm

3 stops35h 55m

$874

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 34 results
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Best time to book a flight from Seattle to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo from Seattle 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 Seattle to Oslo

How far ahead should I book a flight from Seattle to Oslo?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Oslo. Price data was last updated on September 12, 2025.

The price you pay for your flight from Seattle to Oslo may vary depending on when you book. For the best chance of a lower fare, look to book 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Oslo?

Currently, November is the cheapest month in which you can book a flight from Seattle to Oslo (average of $567). Flying from Seattle to Oslo in June is currently the most expensive (average of $1,006). 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 SEA to OSL?

Find hourly flight availability from Seattle 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 septiembre 16, 2025.

It’s optimal to fly from Seattle to Oslo in the evening. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Seattle to Oslo?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Oslo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Oslo flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 septiembre 16, 2025.
See what other customers who have flown with Delta, Scandinavian Airlines, and Icelandair from Seattle to Oslo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

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
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

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!
Scandinavian Airlines
7.4
Good
1,486 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

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!
Icelandair
7.0
Good
544 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

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!
Lufthansa
6.8
Okay
7,407 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

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!
British Airways
6.7
Okay
7,363 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

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

  • What airport do you fly from for flights from Seattle to Oslo?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Oslo. You should not have trouble finding flights to Oslo from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Oslo per day. You should also have plenty of airline options to choose from since 10 airlines have flights from the Seattle airport to Oslo. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

  • How long is the flight from Seattle to Oslo?

    Icelandair can get you from Seattle to Oslo in just under 12h. Your travel time can differ by up to . The distance from Seattle to Oslo is about 4551 mi.

  • What are the cheapest airlines flying from Seattle to Oslo round-trip?

    According to our current data, Icelandair ($409), British Airways ($475), and Finnair ($484) offers the cheapest pricing from Seattle to Oslo. Icelandair is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Seattle to Oslo that include hotel bookings?

    Yes. In addition to deals on Seattle to Oslo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Oslo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Oslo.

  • Can I find deals for business class flights from Seattle to Oslo?

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Oslo?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Oslo (average of $567). Flying from Seattle to Oslo in June is currently the most expensive (average of $1,006). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Seattle to Oslo

Discover the top 10 airlines that operate flights from Seattle 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$409Average$560FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$475Average$640FlexibilityNo cancel feeOn-time70%
FinnairCheapest$484Average$737FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$494Average$727FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$517Average$840FlexibilityNo cancel feeOn-time69%
KLMCheapest$524Average$775FlexibilityNo cancel feeOn-time75%
DeltaCheapest$545Average$858FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$551Average$850FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$552Average$615FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$578Average$731FlexibilityNo cancel feeOn-time71%

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