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Cheap flights from Seattle to Oslo from C$ 412

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSL
5 Sep — 12 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Oslo

Enter your travel dates to find the best prices.

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 6 August 2026.

Sat 22/86:50 p.m. -
1 stop18h 15m
Thu 27/87:10 a.m. -
1 stop18h 49m
Deal found 2/8C$ 701
Sun 15/117:00 a.m. -
2 stops25h 40m
Sat 21/116:15 a.m. -
1 stop14h 45m
Deal found 6/8C$ 703
Sun 20/96:50 p.m. -
1 stop18h 15m
Tue 6/107:10 a.m. -
1 stop18h 49m
Deal found 4/8C$ 712
Thu 24/96:50 p.m. -
1 stop14h 05m
Tue 6/107:10 a.m. -
1 stop18h 49m
Deal found 3/8C$ 715
Sat 22/86:50 p.m. -
1 stop18h 15m
Sun 6/97:10 a.m. -
2 stops20h 22m
Deal found 4/8C$ 716
Sun 15/111:50 p.m. -
1 stop16h 55m
Thu 19/116:15 a.m. -
1 stop14h 45m
Deal found 2/8C$ 727
Tue 18/86:50 p.m. -
1 stop18h 15m
Thu 1/106:45 a.m. -
3 stops41h 08m
Deal found 5/8C$ 734
Wed 9/97:11 a.m. -
2 stops26h 14m
Tue 29/911:45 a.m. -
1 stop14h 14m
Deal found 3/8C$ 737

Find 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 6 August 2026.

Round-trip from

C$ 701

One-way from

C$ 412

Popular in

December

Cheapest in

January

Average price

C$ 831
United Airlines
  • United Airlines
  • 22/8-27/8
  • 2 total stops
  • 37h 04m total
  • Seattle to Oslo
Search Deals
Icelandair
  • Icelandair
  • 18/8
  • 1 total stop
  • 31h 00m total
  • Seattle to Oslo
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 629,999 searches. Data last updated 6 August 2026.
Use the filters below to find and compare flights from Seattle to Oslo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 9/9

7:11 a.m.-12:15 a.m.

2 stops32h 04m

Oslo Gardermoen

Sat 19/9

7:15 a.m.-4:59 p.m.

1 stop18h 44m

C$ 737

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 9/9

7:11 a.m.-6:25 p.m.

2 stops26h 14m

Oslo Gardermoen

Tue 29/9

11:45 a.m.-4:59 p.m.

1 stop14h 14m

C$ 738

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 16/8

6:50 p.m.-12:05 a.m.

2 stops20h 15m

Oslo Gardermoen

Thu 27/8

7:10 a.m.-4:59 p.m.

1 stop18h 49m

C$ 747

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Tue 15/9

7:11 a.m.-6:05 p.m.

2 stops25h 54m

Oslo Gardermoen

Tue 29/9

6:55 a.m.-6:32 p.m.

2 stops20h 37m

C$ 762

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 26/9

6:50 p.m.-10:55 a.m.

1 stop31h 05m

Oslo Gardermoen

Fri 9/10

6:25 a.m.-10:42 p.m.

2 stops25h 17m

C$ 835

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 16/9

1:50 p.m.-4:20 p.m.

1 stop17h 30m

Oslo Gardermoen

Fri 25/9

9:20 a.m.-8:20 p.m.

2 stops20h 00m

C$ 944
Quickest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 23/12

3:25 p.m.-4:10 p.m.

1 stop15h 45m

Oslo Gardermoen

Wed 30/12

6:05 a.m.-11:50 a.m.

1 stop14h 45m

C$ 1,058

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 26/8

6:50 p.m.-10:05 p.m.

1 stop18h 15m

Oslo Gardermoen

Sat 29/8

6:15 a.m.-9:07 p.m.

2 stops23h 52m

C$ 1,085
Cheapest one-way

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 23/12

4:50 p.m.-6:50 p.m.

1 stop17h 00m

C$ 450

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 12/8

6:50 p.m.-10:05 p.m.

1 stop18h 15m

C$ 465

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Oslo (average of C$ 591). Flying from Seattle to Oslo in December is currently the most expensive (average of C$ 1,026). 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.

How much does it cost to fly round-trip from Seattle to Oslo?

Airfare is below average for this route at the moment.
Seattle to Oslo flights typically cost between C$ 722 and C$ 953 in August.
The cheapest round-trip price found within the last 5 days was C$ 701 on United Airlines (22 Aug-27 Aug).

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

To ensure you get the cheapest price possible for a flight from Seattle to Oslo, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 6 August 2026.
Read reviews from past customers who have flown Icelandair from Seattle to Oslo. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
7.0
Good
721 reviews
Check prices

Comfort

6.9

Food

6.1

Entertainment

6.8

Overall

7.0

Crew

8.0

Boarding

7.1

Reviews

1 / 20
6.0
Good

William,Jun 2026

SEA - KEF

First time Iceland Air. Ridiculously small amount of leg room, flight was hotter than hades and people kept requesting for cooler air that never came. You pay for everything, no food of any kind unless you pay which I've never seen on a flight of this length. Just seemed like they are cheap as possible about everything. Won't fly with them again if I can avoid it.
Icelandair
7.0
Good
721 reviews
Icelandair
7.0
Good
721 reviews
Check prices

Comfort

6.9

Food

6.1

Entertainment

6.8

Overall

7.0

Crew

8.0

Boarding

7.1

Reviews

1 / 20
6.0
Good

William,Jun 2026

SEA - KEF

First time Iceland Air. Ridiculously small amount of leg room, flight was hotter than hades and people kept requesting for cooler air that never came. You pay for everything, no food of any kind unless you pay which I've never seen on a flight of this length. Just seemed like they are cheap as possible about everything. Won't fly with them again if I can avoid it.

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), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Oslo. 1 airline have flights from Seattle/Tacoma Intl to Oslo on a regular basis. Booking flights from Seattle/Tacoma Intl to Oslo should not be difficult; the airport handles an average of 0 outbound flights to Oslo per day.

  • How long is the flight from Seattle to Oslo?

    Airlines like United Airlines fly from Seattle to Oslo in about 18h 25m. The time it takes to get you to your destination can typically vary by up to . The distance from Seattle to Oslo is about 7324 km.

  • What is the cheapest airline to fly from Seattle to Oslo round-trip?

    Cheapflights users have booked flights from Seattle to Oslo round-trip from C$ 587. Icelandair is priced at 25% lower than the current average price of a flight leaving 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Oslo (average of C$ 591). Flying from Seattle to Oslo in December is currently the most expensive (average of C$ 1,026). 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

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Alternative routes for Seattle to Oslo

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Oslo Gardermoen flights

Top airline flying from Seattle to Oslo

Discover the top airline 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 629,999 searches. Data last updated 6 August 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 587AverageC$ 711FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Oslo?

Cheapflights helps you search for flights from Seattle to Oslo via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Oslo?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Oslo for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Oslo with no change fees?

Yes, we can. To see specific flights from Seattle to Oslo with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Oslo become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Oslo from Seattle today and book when prices fit your budget.

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