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Cheap flights from Seattle to Oslo Gardermoen Airport from C$ 363

SEA — OSL
24 Nov — 1 Dec1
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

Wed 2/122:35 p.m. -
1 stop12h 00m
Wed 9/121:10 p.m. -
1 stop12h 50m
Deal found 23/10C$ 662
Mon 23/112:35 p.m. -
1 stop12h 00m
Thu 3/121:10 p.m. -
1 stop12h 50m
Deal found 23/10C$ 665
Wed 2/122:50 p.m. -
1 stop17h 50m
Mon 7/126:15 a.m. -
1 stop14h 45m
Deal found 23/10C$ 696
Wed 2/122:50 p.m. -
1 stop17h 50m
Thu 10/1211:50 a.m. -
1 stop34h 10m
Deal found 23/10C$ 700
Mon 23/117:05 p.m. -
2 stops37h 35m
Sat 5/1211:50 a.m. -
2 stops39h 32m
Deal found 23/10C$ 702
Wed 2/122:50 p.m. -
1 stop17h 50m
Sat 12/126:45 a.m. -
2 stops25h 15m
Deal found 23/10C$ 703
Tue 3/119:05 a.m. -
2 stops23h 35m
Thu 12/1111:50 a.m. -
2 stops22h 09m
Deal found 24/10C$ 706
Thu 26/1110:50 a.m. -
2 stops21h 20m
Mon 7/126:15 a.m. -
1 stop14h 45m
Deal found 22/10C$ 707
Tue 8/126:15 a.m. -
2 stops26h 25m
Tue 15/126:45 a.m. -
2 stops24h 58m
Deal found 21/10C$ 709
Wed 18/112:50 p.m. -
1 stop17h 50m
Thu 26/116:15 a.m. -
2 stops36h 25m
Deal found 24/10C$ 710
Thu 26/117:00 a.m. -
2 stops25h 10m
Sat 5/126:45 a.m. -
2 stops23h 16m
Deal found 22/10C$ 714
Wed 2/126:15 a.m. -
2 stops26h 25m
Sun 6/121:55 p.m. -
2 stops18h 49m
Deal found 23/10C$ 717

Find flight deals from Seattle to Oslo Gardermoen

Round-trip from

C$ 662

One-way from

C$ 363

Popular in

December

Cheapest in

January

Average price

C$ 737
Icelandair
  • Icelandair
  • 2/12-9/12
  • 2 total stops
  • 24h 50m total
  • Seattle to Oslo
Search Deals
Icelandair
  • Icelandair
  • 6/12-31/12
  • 1 total stop
  • 12h 00m total
  • Seattle to Oslo
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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

Fri 4/12

2:35 p.m.-11:35 a.m.

1 stop12h 00m

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

Mon 8/2

6:45 p.m.-10:55 a.m.

1 stop31h 10m

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

Tue 16/3

8:30 a.m.-3:45 p.m.

3 stops23h 15m

Oslo Gardermoen

Wed 31/12

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

Nonstop0h 00m

C$ 494

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Tue 9/2

8:30 a.m.-5:10 p.m.

3 stops47h 40m

Oslo Gardermoen

Wed 31/12

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

Nonstop0h 00m

C$ 501

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 4/2

7:15 a.m.-2:35 p.m.

2 stops22h 20m

Oslo Gardermoen

Wed 31/12

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

Nonstop0h 00m

C$ 538

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Fri 5/2

9:55 p.m.-4:10 p.m.

2 stops33h 15m

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 17/1

8:08 a.m.-5:10 p.m.

2 stops24h 02m

Oslo Gardermoen

Sat 30/1

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

1 stop14h 45m

C$ 716

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Sat 16/1

10:50 p.m.-5:10 p.m.

2 stops33h 20m

Oslo Gardermoen

Sat 23/1

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

2 stops25h 00m

C$ 721

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$ 735

SeattleOslo

SEA Seattle/Tacoma Intl - OSL Oslo Gardermoen

SEAOSL

Seattle/Tacoma Intl

Thu 19/11

6:30 a.m.-1:05 p.m.

2 stops21h 35m

Oslo Gardermoen

Thu 26/11

11:50 a.m.-4:27 p.m.

2 stops37h 37m

C$ 735

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/10

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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$ 678). Flying from Seattle to Oslo Gardermoen Airport in December is currently the most expensive (average of C$ 1,087). 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$ 671 and C$ 917 in December.
The cheapest round-trip price found within the last 5 days was C$ 662 on Icelandair (2 Dec-9 Dec).

Reviews of airlines servicing Oslo Gardermoen

Get a feel of what it's like to fly with Icelandair and Lufthansa 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
7.0
Good
764 reviews
Check prices

Entertainment

6.9

Food

6.1

Crew

8.0

Overall

7.0

Comfort

6.9

Boarding

7.2

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
764 reviews
Icelandair
7.0
Good
764 reviews
Check prices

Entertainment

6.9

Food

6.1

Crew

8.0

Overall

7.0

Comfort

6.9

Boarding

7.2

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.
Lufthansa
6.8
Okay
8,292 reviews
Icelandair
7.0
Good
764 reviews
Check prices

Entertainment

6.9

Food

6.1

Crew

8.0

Overall

7.0

Comfort

6.9

Boarding

7.2

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 2 airlines have 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 17h 50m. Your travel time can differ by up to . There are 7324 km between Seattle and Oslo Gardermoen Airport.

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

    Cheapflights users have booked flights from Seattle to Oslo Gardermoen Airport round-trip from C$ 634. Another airline that can offer you cheap pricing is Lufthansa. Icelandair is 23% 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$ 678). Flying from Seattle to Oslo Gardermoen Airport in December is currently the most expensive (average of C$ 1,087). 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 2 airlines flying from Seattle to Oslo Gardermoen

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 634AverageC$ 736FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapestC$ 683AverageC$ 704FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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

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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