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Cheap flights from Seattle to Oslo from C$ 381

SEA — OSL
19 Sep — 26 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

Sun 16/86:50 p.m. -
1 stop18h 15m
Thu 20/87:10 a.m. -
2 stops24h 32m
Deal found 16/8C$ 680
Sun 1/1111:15 p.m. -
2 stops26h 45m
Wed 11/116:15 a.m. -
1 stop14h 45m
Deal found 18/8C$ 693
Thu 8/106:50 p.m. -
1 stop18h 15m
Wed 21/107:10 a.m. -
1 stop18h 49m
Deal found 17/8C$ 695
Mon 14/95:00 a.m. -
2 stops32h 05m
Mon 21/96:45 a.m. -
2 stops16h 32m
Deal found 16/8C$ 707
Mon 24/82:34 p.m. -
2 stops18h 21m
Sat 29/86:15 a.m. -
1 stop14h 40m
Deal found 19/8C$ 709
Thu 10/97:00 a.m. -
2 stops25h 15m
Sat 19/96:15 a.m. -
1 stop14h 40m
Deal found 18/8C$ 713
Wed 9/95:13 p.m. -
2 stops39h 02m
Wed 7/1011:45 a.m. -
1 stop14h 14m
Deal found 20/8C$ 717
Sun 20/96:50 p.m. -
1 stop18h 15m
Sat 3/106:15 a.m. -
1 stop15h 05m
Deal found 18/8C$ 718
Wed 16/95:20 p.m. -
2 stops19h 45m
Wed 23/96:35 a.m. -
2 stops16h 42m
Deal found 19/8C$ 722

Find flight deals from Seattle to Oslo

Round-trip from

C$ 693

One-way from

C$ 381

Popular in

December

Cheapest in

January

Average price

C$ 842
United Airlines
  • United Airlines
  • 1/11-11/11
  • 3 total stops
  • 41h 30m total
  • Seattle to Oslo
Search Deals
4/10
  • 4/10
  • 2 total stops
  • 36h 40m total
  • Seattle to Oslo
Search Deals
High demand for flights, 4% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to Oslo that are best for you.

Fly from

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Route

Depart

Return

Price

Cheapest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 10/9

7:00 a.m.-5:15 p.m.

2 stops25h 15m

Oslo Gardermoen

Sat 19/9

6:45 a.m.-10:45 p.m.

2 stops25h 00m

C$ 720

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 12/9

5:29 p.m.-5:15 p.m.

2 stops38h 46m

Oslo Gardermoen

Mon 21/9

6:45 a.m.-7:14 p.m.

2 stops21h 29m

C$ 727

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 12/9

5:29 p.m.-5:15 p.m.

2 stops38h 46m

Oslo Gardermoen

Sat 19/9

6:45 a.m.-7:14 p.m.

2 stops21h 29m

C$ 727

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$ 728

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Mon 14/9

5:00 a.m.-10:05 p.m.

2 stops32h 05m

Oslo Gardermoen

Mon 21/9

9:55 a.m.-11:55 a.m.

1 stop35h 00m

C$ 735

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 4/10

5:07 p.m.-5:15 p.m.

2 stops39h 08m

Oslo Gardermoen

Fri 9/10

6:25 a.m.-12:20 p.m.

1 stop14h 55m

C$ 743

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 1/10

2:10 p.m.-9:05 a.m.

1 stop33h 55m

Oslo Gardermoen

Thu 8/10

6:45 a.m.-10:42 p.m.

2 stops24h 57m

C$ 852
Quickest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 10/12

11:00 a.m.-12:25 p.m.

2 stops16h 25m

Oslo Gardermoen

Fri 18/12

8:45 a.m.-3:13 p.m.

1 stop15h 28m

C$ 878

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 20/9

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

2 stops20h 15m

Oslo Gardermoen

Sat 3/10

6:15 a.m.-6:32 p.m.

2 stops21h 17m

C$ 953

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Wed 23/12

2:50 p.m.-3:45 p.m.

2 stops15h 55m

Oslo Gardermoen

Sun 3/1

6:15 p.m.-12:00 p.m.

1 stop26h 45m

C$ 1,226

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/8

Showing 1-10 of 21 resultsSorted by cheapest first
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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

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$ 579). Flying from Seattle to Oslo in December is currently the most expensive (average of C$ 994). 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$ 702 and C$ 944 in November.
The cheapest round-trip price found within the last 5 days was C$ 693 on United Airlines (1 Nov-11 Nov).

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 81 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

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
6.9
Okay
730 reviews
Check prices

Entertainment

6.8

Overall

6.9

Boarding

7.1

Comfort

6.8

Crew

8.0

Food

6.1

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
6.9
Okay
730 reviews
Icelandair
6.9
Okay
730 reviews
Check prices

Entertainment

6.8

Overall

6.9

Boarding

7.1

Comfort

6.8

Crew

8.0

Food

6.1

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

  • 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 25h 15m. 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$ 578. Icelandair is priced at 26% 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$ 579). Flying from Seattle to Oslo in December is currently the most expensive (average of C$ 994). 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

Alternative routes for Seattle to Oslo

Seattle to Oslo Gardermoen flights

Top airline flying from Seattle to Oslo

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 578AverageC$ 699FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

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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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