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Cheap flights from Seattle to Oslo from $303

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Oslo departing on 9/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Oslo

Cheap round-trip flights

Icelandair Logo
11:30 pm - 3:25 pmSEA-OSL
30h 55m1 stop
Icelandair Logo
4:30 pm - 11:25 amOSL-SEA
27h 55m1 stop
$431Icelandair
Find Deal
Wed, Sep 3 - Wed, Sep 10
Icelandair Logo
7:00 pm - 3:25 pmSEA-OSL
11h 25m1 stop
Icelandair Logo
1:50 pm - 11:25 amOSL-SEA
30h 35m1 stop
$434Icelandair
Find Deal
Sun, Aug 24 - Sun, Sep 7
Icelandair Logo
7:00 pm - 12:35 pmSEA-OSL
32h 35m1 stop
Icelandair Logo
1:50 pm - 8:40 pmOSL-SEA
15h 50m1 stop
$439Icelandair
Find Deal
Wed, Oct 1 - Wed, Oct 8
British Airways Logo
2:25 pm - 2:10 pmSEA-OSL
15h 45m1 stop
British Airways Logo
11:45 am - 4:55 pmOSL-SEA
14h 10m1 stop
$472British Airways
Find Deal
Tue, Oct 28 - Fri, Nov 7
British Airways Logo
11:42 am - 10:40 pmSEA-OSL
25h 58m2 stops
British Airways Logo
2:40 pm - 4:55 pmOSL-SEA
35h 15m1 stop
$476British Airways
Find Deal
Mon, Nov 10 - Mon, Nov 24
Scandinavian Airlines Logo
4:20 pm - 4:00 pmSEA-OSL
14h 40m1 stop
Scandinavian Airlines Logo
9:00 am - 2:00 pmOSL-SEA
14h 00m1 stop
$497Scandinavian Airlines
Find Deal
Fri, Oct 3 - Fri, Oct 10
Delta Logo
11:43 am - 4:20 pmSEA-OSL
20h 37m2 stops
Delta Logo
6:25 am - 1:20 pmOSL-SEA
15h 55m1 stop
$498Delta
Find Deal
Tue, Oct 28 - Fri, Nov 7
Lufthansa Logo
7:00 am - 5:40 pmSEA-OSL
26h 40m2 stops
Lufthansa Logo
6:15 am - 12:10 pmOSL-SEA
14h 55m1 stop
$500Lufthansa
Find Deal
Tue, Oct 28 - Fri, Nov 7
Scandinavian Airlines Logo
4:20 pm - 4:00 pmSEA-OSL
14h 40m1 stop
Scandinavian Airlines Logo
9:00 am - 10:25 pmOSL-SEA
22h 25m2 stops
$510Scandinavian Airlines
Find Deal
Fri, Oct 17 - Fri, Nov 7
Delta Logo
5:40 pm - 6:35 pmSEA-OSL
15h 55m1 stop
Delta Logo
6:05 am - 5:40 pmOSL-SEA
20h 35m1 stop
$536Delta
Find Deal
Tue, Sep 9 - Wed, Oct 1

British Airways flights from Seattle to Oslo Gardermoen Airport

Our best British Airways deals on Seattle to Oslo Gardermoen Airport flight tickets
British Airways
Oct 28
SEA2:25 pmSeattle/Tacoma Intl
15h 45m
1 stop
OSL2:10 pmOslo Gardermoen
Nov 7
OSL11:45 amOslo Gardermoen
14h 10m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
$472
Find similar
British Airways
Nov 10
SEA11:42 amSeattle/Tacoma Intl
25h 58m
2 stops
OSL10:40 pmOslo Gardermoen
Nov 24
OSL2:40 pmOslo Gardermoen
35h 15m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
$476
Find similar
British Airways
Oct 28
SEA2:25 pmSeattle/Tacoma Intl
24h 15m
1 stop
OSL10:40 pmOslo Gardermoen
Nov 7
OSL7:10 amOslo Gardermoen
18h 45m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
$477
Find similar

Scandinavian Airlines flights from Seattle to Oslo Gardermoen Airport

Our best Scandinavian Airlines deals on Seattle to Oslo Gardermoen Airport flight tickets
Scandinavian Airlines
Oct 3
SEA4:20 pmSeattle/Tacoma Intl
14h 40m
1 stop
OSL4:00 pmOslo Gardermoen
Oct 10
OSL9:00 amOslo Gardermoen
14h 00m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$497
Find similar
Scandinavian Airlines
Oct 17
SEA4:20 pmSeattle/Tacoma Intl
14h 40m
1 stop
OSL4:00 pmOslo Gardermoen
Nov 7
OSL9:00 amOslo Gardermoen
22h 25m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
$510
Find similar
Scandinavian Airlines
Aug 26
SEA7:18 amSeattle/Tacoma Intl
20h 37m
2 stops
OSL12:55 pmOslo Gardermoen
Sep 1
OSL7:10 amOslo Gardermoen
24h 15m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
$778
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Oslo Gardermoen Airport 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, momondo users made 832,500 searches. Data last updated August 21, 2025.
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

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 9/3

11:30 pm-3:25 pm

1 stop30h 55m

Oslo Gardermoen

Wed 9/10

4:30 pm-11:25 am

1 stop27h 55m

$431

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Sun 8/24

7:00 pm-3:25 pm

1 stop11h 25m

Oslo Gardermoen

Sun 9/7

1:50 pm-11:25 am

1 stop30h 35m

$434

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Wed 10/1

7:00 pm-12:35 pm

1 stop32h 35m

Oslo Gardermoen

Wed 10/8

1:50 pm-8:40 pm

1 stop15h 50m

$439

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

2:25 pm-2:10 pm

1 stop15h 45m

Oslo Gardermoen

Fri 11/7

11:45 am-4:55 pm

1 stop14h 10m

$472

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Mon 11/10

11:42 am-10:40 pm

2 stops25h 58m

Oslo Gardermoen

Mon 11/24

2:40 pm-4:55 pm

1 stop35h 15m

$476

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Fri 10/3

4:20 pm-4:00 pm

1 stop14h 40m

Oslo Gardermoen

Fri 10/10

9:00 am-2:00 pm

1 stop14h 00m

$497

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

11:43 am-4:20 pm

2 stops20h 37m

Oslo Gardermoen

Fri 11/7

6:25 am-1:20 pm

1 stop15h 55m

$498

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 10/28

7:00 am-5:40 pm

2 stops26h 40m

Oslo Gardermoen

Fri 11/7

6:15 am-12:10 pm

1 stop14h 55m

$500

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Fri 10/17

4:20 pm-4:00 pm

1 stop14h 40m

Oslo Gardermoen

Fri 11/7

9:00 am-10:25 pm

2 stops22h 25m

$510

SeattleOslo

SEA - OSL

SEAOSL

Seattle/Tacoma Intl

Tue 9/9

5:40 pm-6:35 pm

1 stop15h 55m

Oslo Gardermoen

Wed 10/1

6:05 am-5:40 pm

1 stop20h 35m

$536

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Oslo from

How to get the cheapest flight ticket from Seattle to Oslo Gardermoen Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Oslo Gardermoen Airport?

The cheapest month to fly to Oslo Gardermoen Airport from Seattle is in January. Flight prices, which tend to average around $531, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Oslo Gardermoen Airport from Seattle during October instead. Flights to Oslo Gardermoen Airport in October, while not as cheap as those in January, still average around $531.

What is the cheapest day to depart on your flight to Oslo Gardermoen Airport?

According to our data, Tuesday is the cheapest day to fly to Oslo Gardermoen Airport from Seattle. The lowest ticket price found for a Tuesday departure recently was $772. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Oslo Gardermoen Airport for around $896.

What is the cheapest time of day to depart on your flight to Oslo Gardermoen Airport?

Our most recent data shows that the best time of day to fly to Oslo Gardermoen Airport is in the evening. Flights from Seattle to Oslo Gardermoen Airport during this time can be as low as $696. In contrast, the most expensive time of day to depart to Oslo Gardermoen Airport is in the afternoon when prices are around $959.

How far in advance should I book a flight to Oslo Gardermoen Airport?

You are more likely to see cheaper flights to Oslo Gardermoen Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Oslo Gardermoen Airport for around $629 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Oslo Gardermoen Airport from Seattle for as low as $529 on momondo.

How have Seattle to Oslo Gardermoen Airport flight prices changed over time?

As of August 2025, prices for Seattle to Oslo Gardermoen Airport flights are approximately 47% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Oslo Gardermoen Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Oslo Gardermoen Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Oslo Gardermoen Airport (SEA to OSL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Oslo Gardermoen Airport

Direct flights

None
There are no direct flights from Seattle to Oslo Gardermoen Airport. There are no popular flight routes from Seattle to Oslo Gardermoen Airport.
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  • How far is Seattle/Tacoma Intl to Oslo Gardermoen by plane?

    Seattle/Tacoma Intl and Oslo Gardermoen are 4540.7 mi apart from one another. 11h 25m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Oslo Gardermoen Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Oslo Gardermoen Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Oslo Gardermoen Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Oslo Gardermoen Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Oslo Gardermoen Airport.

  • What documentation or ID do you need to fly to Oslo Gardermoen Airport?

    The travel and health documents you'll need for your trip to Oslo Gardermoen Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Oslo Gardermoen Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Oslo Gardermoen Airport?

Best airlines flying from Seattle to Oslo Gardermoen Airport

Compare and see reviews for airlines that fly from Seattle to Oslo Gardermoen Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $415Free CancellationRating
7.0
529 reviews
Search Icelandair flights
British AirwaysPriceFrom $475Free CancellationRating
6.7
7,291 reviews
Search British Airways flights
FinnairPriceFrom $484Free CancellationRating
7.6
1,320 reviews
Search Finnair flights
Scandinavian AirlinesPriceFrom $494Free CancellationRating
7.4
1,471 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $517Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
KLMPriceFrom $551Free CancellationRating
7.8
1,388 reviews
Search KLM flights
LufthansaPriceFrom $551Free CancellationRating
6.8
7,344 reviews
Search Lufthansa flights
Air FrancePriceFrom $552Free CancellationRating
7.4
1,469 reviews
Search Air France flights
DeltaPriceFrom $569Free CancellationRating
7.9
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $578Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near Oslo?

Book flights to Oslo if you plan to visit one of these locations
Gardermoen
Fredrikstad
Drammen
Lillehammer

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Oslo?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Oslo from Seattle.

Can I find flights from Seattle to Oslo with flexible booking policies on momondo?

Flights from Seattle to Oslo with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Oslo?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Oslo from Seattle.

I’m not ready to book a flight from Seattle to Oslo right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to Oslo flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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