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Trondheim

$263+ Cheap flights from Seattle (SEA) to Trondheim (TRD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Seattle to Trondheim

Best flights from Seattle to Trondheim
Discover carefully curated flight deals from Seattle to Trondheim that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

This KLM deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/143:10 pmSEA - TRD
1 stop22h 45mKLM
Wed 1/286:15 amTRD - SEA
1 stop14h 35mKLM
Deal found 12/26$526
This Delta deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/147:10 amSEA - TRD
2 stops24h 25mDelta
Wed 1/286:15 amTRD - SEA
1 stop14h 35mDelta
Deal found 12/26$531
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/237:10 amSEA - TRD
2 stops32h 30mScandinavian Airlines
Tue 1/277:45 pmTRD - SEA
2 stops35h 40mScandinavian Airlines
Deal found 12/26$722
This Scandinavian Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/222:00 pmSEA - TRD
2 stops39h 30mScandinavian Airlines
Thu 2/267:45 pmTRD - SEA
2 stops35h 40mScandinavian Airlines
Deal found 12/25$723
This Scandinavian Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/141:30 pmSEA - TRD
3 stops22h 00mScandinavian Airlines
Wed 1/285:30 amTRD - SEA
2 stops26h 52mScandinavian Airlines
Deal found 12/26$900

Find flight deals from Seattle to Trondheim

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Trondheim (TRD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$526
(KLM)

One-way from

$263
(KLM)
Provider with most accurate pricing for Seattle/Tacoma Intl-Trondheim Vaernes flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Trondheim Vaernes flights.
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From Seattle/Tacoma Intl to Trondheim Vaernes
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One-way flight from Seattle/Tacoma Intl to Trondheim Vaernes
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Trondheim 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, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Seattle to Trondheim that are best for you.

Fly from

Seattle

Fly to

Trondheim

Route

Depart

Return

Price

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 1/14

3:10 pm-10:55 pm

1 stop22h 45m

Trondheim Vaernes

Wed 1/28

6:15 am-11:50 am

1 stop14h 35m

$526

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 1/14

7:10 am-4:35 pm

2 stops24h 25m

Trondheim Vaernes

Wed 1/28

6:15 am-11:50 am

1 stop14h 35m

$531

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Fri 1/23

7:10 am-12:40 am

2 stops32h 30m

Trondheim Vaernes

Tue 1/27

7:45 pm-10:25 pm

2 stops35h 40m

$722

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 2/22

2:00 pm-2:30 pm

2 stops39h 30m

Trondheim Vaernes

Thu 2/26

7:45 pm-10:25 pm

2 stops35h 40m

$723

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 1/14

1:30 pm-8:30 pm

3 stops22h 00m

Trondheim Vaernes

Wed 1/28

5:30 am-11:22 pm

2 stops26h 52m

$900

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 5/14

5:30 pm-10:50 pm

1 stop20h 20m

$263

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 5/14

9:30 am-4:35 pm

2 stops22h 05m

$267

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 5/14

7:00 pm-8:25 am

3 stops28h 25m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Compare providers for flights from Seattle to Trondheim

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Trondheim in December.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Trondheim flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Trondheim flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Trondheim flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Trondheim flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Trondheim flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Trondheim

Have a flexible travel schedule? Discover the best time to fly to Trondheim from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Trondheim. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Trondheim?

    KLM, Delta, and Scandinavian Airlines can get you from Seattle to Trondheim in just under 22h 45m. Your travel time can differ by up to 9h 45m. The distance between Seattle and Trondheim is about 4358 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Seattle to Trondheim that include hotel bookings?

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

  • How can I find direct flights from Seattle to Trondheim?

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

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

    Yes. Cheapflights offers flight deals from Seattle to Trondheim by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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