$374 Cheap Flights from Seattle (SEA) to Oslo (OSL)

View $374 flight on Mon, Oct 13, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Gardermoen Airport (OSL)

Cheap Flights from Seattle to Oslo (SEA-OSL)

Prices were available within the past 7 days and start at $374 for one-way flights and $419 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sat, Oct 25 - Sat, Nov 8
SEA
Seattle
OSL
Oslo
$419 Roundtrip, found 1 day ago
$419
Roundtrip
found 1 day ago
Select Icelandair flight, departing Sat, Oct 25 from Seattle to Oslo, returning Sat, Nov 8, priced at $419 found 1 day ago
Icelandair
Fri, Nov 28 - Mon, Dec 8
SEA
Seattle
OSL
Oslo
$419 Roundtrip, found 13 hours ago
$419
Roundtrip
found 13 hours ago
Select Icelandair flight, departing Fri, Nov 28 from Seattle to Oslo, returning Mon, Dec 8, priced at $419 found 13 hours ago
Icelandair
Thu, Oct 23 - Sun, Nov 2
SEA
Seattle
OSL
Oslo
$420 Roundtrip, found 1 day ago
$420
Roundtrip
found 1 day ago
Select Icelandair flight, departing Thu, Oct 23 from Seattle to Oslo, returning Sun, Nov 2, priced at $420 found 1 day ago
Icelandair
Thu, Nov 6 - Sun, Nov 23
SEA
Seattle
OSL
Oslo
$421 Roundtrip, found 1 hour ago
$421
Roundtrip
found 1 hour ago
Select Icelandair flight, departing Thu, Nov 6 from Seattle to Oslo, returning Sun, Nov 23, priced at $421 found 1 hour ago
Icelandair
Fri, Feb 6 - Sun, Feb 22
SEA
Seattle
OSL
Oslo
$422 Roundtrip, found 2 hours ago
$422
Roundtrip
found 2 hours ago
Select Icelandair flight, departing Fri, Feb 6 from Seattle to Oslo, returning Sun, Feb 22, priced at $422 found 2 hours ago
Scandinavian Airlines
Mon, May 18 - Mon, May 25
SEA
Seattle
OSL
Oslo
$453 Roundtrip, found 2 days ago
$453
Roundtrip
found 2 days ago
Select Scandinavian Airlines flight, departing Mon, May 18 from Seattle to Oslo, returning Mon, May 25, priced at $453 found 2 days ago
British Airways
Wed, Apr 22 - Wed, Apr 29
SEA
Seattle
OSL
Oslo
$476 Roundtrip, found 1 day ago
$476
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Apr 22 from Seattle to Oslo, returning Wed, Apr 29, priced at $476 found 1 day ago
American Airlines
Tue, Nov 4 - Wed, Nov 12
SEA
Seattle
OSL
Oslo
$486 Roundtrip, found 18 hours ago
$486
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Tue, Nov 4 from Seattle to Oslo, returning Wed, Nov 12, priced at $486 found 18 hours ago
Delta
Mon, Mar 23 - Wed, Apr 1
SEA
Seattle
OSL
Oslo
$502 Roundtrip, found 1 day ago
$502
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Mar 23 from Seattle to Oslo, returning Wed, Apr 1, priced at $502 found 1 day ago
Lufthansa
Sun, Nov 9 - Fri, Nov 21
SEA
Seattle
OSL
Oslo
$508 Roundtrip, found 1 hour ago
$508
Roundtrip
found 1 hour ago
Select Lufthansa flight, departing Sun, Nov 9 from Seattle to Oslo, returning Fri, Nov 21, priced at $508 found 1 hour ago

Find the cheapest month to fly from Seattle (SEA) to Oslo (OSL)

November is typically the cheapest month to fly

From $416 - $1,197 per traveler.

Alternative airports near Oslo

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gardermoen OSL. Cheapest and Closest option available. Average driving time to city center is 40 minutes. Flights from $441
OSL
Gardermoen
CheapestClosest
Average driving time to city center40 min
Flights from $441

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL) cost?
Snag a cheap one-way flight from $374 or cheap return flight from $419 from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL)?
The cheapest month to fly from SEA to OSL is October, when there's less demand. Off-peak months are usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL)?
To find the cheapest airline flying from SEA to OSL, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL)?
You'll need to hop on a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from SEA to OSL?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL)?
To reach Gardermoen Airport (OSL) on schedule, pick a flight that leaves Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL) last-minute?
Waiting until just before your departure to book your flight from SEA to OSL generally means paying more. While you might find some last-minute deals, they aren't always guaranteed. Be flexible with your travel plans to maximize your chances of snagging a bargain.
Is it cheaper to book a SEA to OSL flight and hotel package?
You'll typically save money by booking a SEA to OSL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your preferred accommodations and flights, you can add extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Gardermoen Airport (OSL)?
Usually, it's possible to cancel or reschedule your SEA to OSL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Gardermoen
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$418
Distance
4553 mi

Book with confidence

Book with confidence

Seattle to Oslo Flights

The cheapest times to fly from Seattle to Oslo

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Oslo are during the month of October. You can find some of the cheapest flights from Seattle to Oslo with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Oslo

Sunday is one of the best days to book for cheap flights from Seattle to Oslo: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Oslo

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Oslo in 2025. You can also book with separate airlines for your outbound and return journeys, from $374 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Oslo flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Oslo airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Oslo Flights

Explore a world of travel with Expedia

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*Available to One Key members.