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Trondheim

$522+ Cheap flights from Seattle (SEA) to Trondheim (TRD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
Dec 24 — Dec 311
Wed 12/24
Wed 12/31
1 adult, Economy
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Cheap 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 November 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$520
(Scandinavian Airlines)
Provider with most accurate pricing for Seattle/Tacoma Intl-Trondheim Vaernes flight deals.
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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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Find 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 November 24, 2025.

This KLM deal was found by Cheapflights users on 11/21. 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.
Sun 5/35:35 pmSEA - TRD
1 stop33h 00mKLM
Sun 5/105:10 pmTRD - SEA
1 stop31h 40mKLM
Deal found 11/21$522
This Delta deal was found by Cheapflights users on 11/22. 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 5/137:20 amSEA - TRD
2 stops19h 15mDelta
Wed 5/206:00 amTRD - SEA
2 stops19h 55mDelta
Deal found 11/22$537
This Scandinavian Airlines deal was found by Cheapflights users on 11/23. 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.
Mon 2/97:10 amSEA - TRD
2 stops22h 20mScandinavian Airlines
Fri 2/137:45 pmTRD - SEA
2 stops35h 40mScandinavian Airlines
Deal found 11/23$550
This Finnair deal was found by Cheapflights users on 11/23. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:35 pmSEA - TRD
2 stops33h 45mFinnair
Sun 5/108:50 amTRD - SEA
1 stop16h 10mFinnair
Deal found 11/23$577
This Finnair deal was found by Cheapflights users on 11/21. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/11:35 pmSEA - TRD
2 stops20h 50mMultiple Airlines
Fri 5/86:05 pmTRD - SEA
2 stops39h 47mMultiple Airlines
Deal found 11/21$658
This CheapOair deal was found by Cheapflights users on 11/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/32:00 pmSEA - TRD
2 stops34h 40mScandinavian Airlines
Sun 5/103:05 pmTRD - SEA
2 stops42h 17mScandinavian Airlines
Deal found 11/23$581
This Delta deal was found by Cheapflights users on 11/23. 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.
Mon 2/93:05 pmSEA - TRD
1 stop16h 30mDelta
Fri 2/136:15 amTRD - SEA
1 stop14h 25mDelta
Deal found 11/23$648
This Delta deal was found by Cheapflights users on 11/21. 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.
Fri 5/112:00 pmSEA - TRD
2 stops19h 30mDelta
Fri 5/86:00 amTRD - SEA
1 stop18h 50mDelta
Deal found 11/21$657

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 November 24, 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

Sun 5/3

5:35 pm-11:35 am

1 stop33h 00m

Trondheim Vaernes

Sun 5/10

5:10 pm-3:50 pm

1 stop31h 40m

$522

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 5/13

7:20 am-11:35 am

2 stops19h 15m

Trondheim Vaernes

Wed 5/20

6:00 am-4:55 pm

2 stops19h 55m

$537

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 2/9

7:10 am-2:30 pm

2 stops22h 20m

Trondheim Vaernes

Fri 2/13

7:45 pm-10:25 pm

2 stops35h 40m

$550

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 5/3

1:35 pm-8:20 am

2 stops33h 45m

Trondheim Vaernes

Sun 5/10

8:50 am-4:00 pm

1 stop16h 10m

$577

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 5/3

2:00 pm-9:40 am

2 stops34h 40m

Trondheim Vaernes

Sun 5/10

3:05 pm-12:22 am

2 stops42h 17m

$581

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 2/9

3:05 pm-4:35 pm

1 stop16h 30m

Trondheim Vaernes

Fri 2/13

6:15 am-11:40 am

1 stop14h 25m

$648

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Fri 5/1

12:00 pm-4:30 pm

2 stops19h 30m

Trondheim Vaernes

Fri 5/8

6:00 am-3:50 pm

1 stop18h 50m

$657

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Fri 5/1

1:35 pm-7:25 pm

2 stops20h 50m

Trondheim Vaernes

Fri 5/8

6:05 pm-12:52 am

2 stops39h 47m

$658

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

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 November.
ProviderPrice AccuracyTrust Score*
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 19h 15m. Your travel time can differ by up to 13h 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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