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Cheap flights from Seattle to Oslo Gardermoen Airport from C$ 372

SEA — OSL
11 Oct — 18 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Oslo Gardermoen

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Oslo Gardermoen

Tue 20/106:50 p.m. -
1 stop18h 15m
Sat 7/116:15 a.m. -
1 stop14h 45m
Deal found 9/9C$ 689
Tue 3/113:49 p.m. -
2 stops16h 51m
Thu 12/1111:50 a.m. -
2 stops39h 43m
Deal found 10/9C$ 699
Sat 7/1111:17 p.m. -
2 stops32h 53m
Mon 16/116:15 a.m. -
1 stop14h 45m
Deal found 6/9C$ 701
Wed 21/1010:42 a.m. -
2 stops21h 33m
Thu 5/116:15 a.m. -
1 stop14h 45m
Deal found 9/9C$ 702
Wed 7/106:50 p.m. -
1 stop18h 15m
Wed 14/106:35 a.m. -
2 stops16h 47m
Deal found 6/9C$ 705
Thu 12/1110:50 a.m. -
2 stops21h 20m
Tue 17/116:45 a.m. -
2 stops21h 18m
Deal found 7/9C$ 707
Mon 19/103:55 p.m. -
2 stops21h 10m
Mon 26/106:15 a.m. -
1 stop14h 45m
Deal found 8/9C$ 712
Thu 22/107:00 a.m. -
2 stops25h 15m
Thu 29/106:15 a.m. -
1 stop14h 45m
Deal found 7/9C$ 716
Sun 27/96:50 p.m. -
1 stop18h 15m
Mon 5/106:45 a.m. -
2 stops20h 47m
Deal found 6/9C$ 718
Mon 5/1011:14 p.m. -
2 stops33h 01m
Tue 13/107:10 a.m. -
1 stop18h 49m
Deal found 10/9C$ 720

Find flight deals from Seattle to Oslo Gardermoen

Round-trip from

C$ 591

One-way from

C$ 372

Popular in

December

Cheapest in

January

Average price

C$ 821
Icelandair
  • Icelandair
  • 19/2-23/2
  • 2 total stops
  • 24h 50m total
  • Seattle to Oslo
Search Deals
Icelandair
  • Icelandair
  • 11/1-31/12
  • 1 total stop
  • 12h 00m total
  • Seattle to Oslo
Search Deals
High demand for flights, 3% potential price rise
Search Deals
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
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Mon 11/1

4:55 p.m.-6:50 p.m.

1 stop16h 55m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 445

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Fri 27/11

6:00 a.m.-1:50 p.m.

2 stops22h 50m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 450

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 9/1

11:45 a.m.-4:10 p.m.

2 stops19h 25m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 461

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 4/10

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

1 stop18h 15m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 500

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 9/1

3:51 p.m.-11:40 p.m.

3 stops46h 49m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 506

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 24/9

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

2 stops25h 15m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 508

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Fri 6/11

12:20 p.m.-8:45 a.m.

3 stops59h 25m

Oslo Gardermoen

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 539

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 10/1

10:45 p.m.-5:10 p.m.

2 stops33h 25m

Oslo Gardermoen

Mon 31/5

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

1 stop18h 49m

C$ 727

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 22/10

10:42 a.m.-5:15 p.m.

2 stops21h 33m

Oslo Gardermoen

Thu 29/10

6:15 a.m.-10:51 p.m.

2 stops24h 36m

C$ 731

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sun 10/1

1:50 p.m.-1:05 p.m.

1 stop14h 15m

Oslo Gardermoen

Tue 1/6

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

1 stop14h 14m

C$ 734

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
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Best time to book a flight from Seattle to Oslo Gardermoen

Have a flexible travel schedule? Discover the best time to fly to Oslo Gardermoen 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 Gardermoen Airport

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

The price you pay for your flight from Seattle to Oslo Gardermoen Airport may vary depending on when you book. For the best chance of a lower fare, look to book 86 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 Gardermoen Airport?

Currently, January is the cheapest month in which you can book a flight from Seattle to Oslo Gardermoen Airport (average of C$ 580). Flying from Seattle to Oslo Gardermoen Airport in December is currently the most expensive (average of C$ 1,072). 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 Gardermoen Airport?

Airfare is below average for this route at the moment.

Seattle to Oslo Gardermoen Airport flights typically cost between C$ 684 and C$ 926 in February.
The cheapest round-trip price found within the last 5 days was C$ 591 on Icelandair (19 Feb-24 Feb).

Reviews of airlines servicing Oslo Gardermoen

Get a feel of what it's like to fly with Icelandair from Seattle to Oslo Gardermoen Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
6.9
Okay
741 reviews
Check prices

Entertainment

6.9

Crew

8.0

Comfort

6.9

Overall

6.9

Boarding

7.2

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
741 reviews
Icelandair
6.9
Okay
741 reviews
Check prices

Entertainment

6.9

Crew

8.0

Comfort

6.9

Overall

6.9

Boarding

7.2

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 Gardermoen?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Oslo Gardermoen. You should not have trouble finding flights to Oslo Gardermoen from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Oslo Gardermoen per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Seattle airport to Oslo Gardermoen. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

  • How long is the flight from Seattle to Oslo Gardermoen Airport?

    United Airlines can get you from Seattle to Oslo Gardermoen Airport in just under 34h 14m. Your travel time can differ by up to . There are 7324 km between Seattle and Oslo Gardermoen Airport.

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

    Cheapflights users have booked flights from Seattle to Oslo Gardermoen Airport round-trip from C$ 579. Icelandair is 27% 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 Gardermoen that include hotel bookings?

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Oslo Gardermoen Airport (average of C$ 580). Flying from Seattle to Oslo Gardermoen Airport in December is currently the most expensive (average of C$ 1,072). 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

Top airline flying from Seattle to Oslo Gardermoen

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 579AverageC$ 726FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

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When you search for this flight from Seattle to Oslo Gardermoen, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Oslo Gardermoen from Seattle.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Oslo Gardermoen, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Seattle to Oslo Gardermoen flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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