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Cheap flights from Seattle to Oslo from C$ 304

SEA — OSL
2 Oct — 9 Oct1
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

Tue 20/107:00 p.m. -
1 stop11h 25m
Thu 29/101:10 p.m. -
1 stop12h 50m
Deal found 1/9C$ 682
Sun 18/106:50 p.m. -
1 stop18h 15m
Sun 1/116:15 a.m. -
1 stop14h 45m
Deal found 1/9C$ 693
Wed 9/96:50 p.m. -
1 stop18h 15m
Thu 8/107:10 a.m. -
1 stop18h 49m
Deal found 30/8C$ 697
Mon 2/118:09 a.m. -
2 stops24h 01m
Mon 9/116:15 a.m. -
1 stop14h 45m
Deal found 30/8C$ 704
Wed 9/96:50 p.m. -
1 stop14h 05m
Wed 7/106:35 a.m. -
2 stops16h 47m
Deal found 30/8C$ 708
Wed 21/106:50 p.m. -
1 stop18h 15m
Wed 28/106:15 a.m. -
1 stop14h 45m
Deal found 1/9C$ 709
Thu 15/106:50 p.m. -
1 stop18h 15m
Thu 22/107:10 a.m. -
2 stops24h 46m
Deal found 31/8C$ 711
Tue 20/101:56 p.m. -
2 stops23h 09m
Thu 29/106:15 a.m. -
1 stop14h 45m
Deal found 1/9C$ 713
Wed 7/106:50 p.m. -
1 stop18h 15m
Fri 16/106:45 a.m. -
2 stops18h 20m
Deal found 28/8C$ 715
Sun 11/1010:48 p.m. -
2 stops33h 27m
Sun 18/106:25 a.m. -
2 stops25h 22m
Deal found 28/8C$ 719
Mon 21/911:04 p.m. -
2 stops33h 11m
Tue 29/97:10 a.m. -
1 stop18h 49m
Deal found 30/8C$ 722

Find flight deals from Seattle to Oslo

Round-trip from

C$ 682

One-way from

C$ 304

Popular in

December

Cheapest in

January

Average price

C$ 825
Icelandair
  • Icelandair
  • 20/10-29/10
  • 2 total stops
  • 24h 15m total
  • Seattle to Oslo
Search Deals
Scandinavian Airlines
  • Scandinavian Airlines
  • 6/10
  • 1 total stop
  • 18h 05m total
  • Seattle to Oslo
Search Deals
High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 3% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Tue 20/10

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

1 stop18h 15m

Oslo Gardermoen

Sun 1/11

6:15 a.m.-1:00 p.m.

1 stop14h 45m

C$ 693

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Tue 20/10

1:56 p.m.-10:05 p.m.

2 stops23h 09m

Oslo Gardermoen

Thu 29/10

6:15 a.m.-1:00 p.m.

1 stop14h 45m

C$ 713

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Tue 20/10

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

1 stop18h 15m

Oslo Gardermoen

Sat 31/10

1:55 p.m.-1:00 p.m.

1 stop31h 05m

C$ 722

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 27/9

6:30 a.m.-10:05 p.m.

2 stops30h 35m

Oslo Gardermoen

Sun 4/10

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

1 stop14h 55m

C$ 729
Quickest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 17/10

7:00 p.m.-3:25 p.m.

1 stop11h 25m

Oslo Gardermoen

Thu 29/10

1:10 p.m.-6:00 p.m.

1 stop12h 50m

C$ 732

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Fri 23/10

3:40 p.m.-12:35 p.m.

1 stop11h 55m

Oslo Gardermoen

Thu 29/10

1:10 p.m.-6:00 p.m.

1 stop12h 50m

C$ 732

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Mon 1/2

1:50 p.m.-3:45 p.m.

1 stop16h 55m

Oslo Gardermoen

Thu 4/2

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

1 stop14h 45m

C$ 733

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 4/10

11:13 p.m.-5:15 p.m.

2 stops33h 02m

Oslo Gardermoen

Sun 11/10

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

1 stop14h 14m

C$ 737

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 4/10

11:13 p.m.-5:15 p.m.

2 stops33h 02m

Oslo Gardermoen

Fri 9/10

6:45 a.m.-6:52 p.m.

2 stops21h 07m

C$ 747

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 1/11

1:16 p.m.-11:40 p.m.

2 stops25h 24m

Oslo Gardermoen

Tue 10/11

1:55 p.m.-12:00 p.m.

1 stop31h 05m

C$ 758

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/8

Showing 1-10 of 20 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

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$ 583). Flying from Seattle to Oslo in December is currently the most expensive (average of C$ 1,077). 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$ 687 and C$ 930 in October.
The cheapest round-trip price found within the last 5 days was C$ 682 on Icelandair (20 Oct-29 Oct).

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 80 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
738 reviews
Check prices

Overall

6.9

Boarding

7.2

Food

6.1

Crew

8.0

Entertainment

6.9

Comfort

6.9

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
738 reviews
Icelandair
6.9
Okay
738 reviews
Check prices

Overall

6.9

Boarding

7.2

Food

6.1

Crew

8.0

Entertainment

6.9

Comfort

6.9

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 18h 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$ 582. Icelandair is priced at 27% 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$ 583). Flying from Seattle to Oslo in December is currently the most expensive (average of C$ 1,077). 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$ 582AverageC$ 703FlexibilityNo 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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