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Trondheim

$243+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
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Cheap flight deals from Seattle to Trondheim

Cheapest flights from Seattle to Trondheim
Explore the most affordable flight options available from Seattle to Trondheim. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This Ticket deal was found by Cheapflights users on 2/13. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/305:30 pm
SEA
-
TRD
1 stop33h 05m
KLM
Mon 4/66:00 am
TRD
-
SEA
1 stop19h 30m
KLM
Deal found 2/13$447
This KLM deal was found by Cheapflights users on 2/12. 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 3/295:30 pm
SEA
-
TRD
1 stop20h 20m
KLM
Sun 4/56:00 am
TRD
-
SEA
1 stop14h 45m
KLM
Deal found 2/12$477
This Delta deal was found by Cheapflights users on 2/11. 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.
Thu 3/57:10 am
SEA
-
TRD
2 stops24h 25m
Delta
Thu 3/126:15 am
TRD
-
SEA
1 stop14h 20m
Delta
Deal found 2/11$482
This KLM deal was found by Cheapflights users on 2/11. 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.
Thu 3/53:05 pm
SEA
-
TRD
1 stop22h 50m
KLM
Thu 3/126:15 am
TRD
-
SEA
1 stop14h 20m
KLM
Deal found 2/11$618
This lastminute.com deal was found by Cheapflights users on 2/13. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:20 am
SEA
-
TRD
2 stops17h 20m
Scandinavian Airlines
Mon 4/65:45 pm
TRD
-
SEA
2 stops37h 39m
Scandinavian Airlines
Deal found 2/13$662
This Delta deal was found by Cheapflights users on 2/12. 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.
Sun 3/297:20 am
SEA
-
TRD
2 stops19h 15m
Delta
Sun 4/56:00 am
TRD
-
SEA
1 stop14h 45m
Delta
Deal found 2/12$667
This KLM deal was found by Cheapflights users on 2/10. 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.
Fri 3/274:05 pm
SEA
-
TRD
1 stop34h 30m
KLM
Fri 4/312:10 pm
TRD
-
SEA
1 stop32h 35m
KLM
Deal found 2/10$837
This Gotogate deal was found by Cheapflights users on 2/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/277:00 pm
SEA
-
TRD
2 stops33h 35m
Multiple Airlines
Fri 4/36:25 am
TRD
-
SEA
2 stops20h 30m
Multiple Airlines
Deal found 2/10$868
This Scandinavian Airlines deal was found by Cheapflights users on 2/10. 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 2/2311:17 am
SEA
-
TRD
2 stops37h 23m
Scandinavian Airlines
Fri 2/277:45 pm
TRD
-
SEA
2 stops35h 40m
Scandinavian Airlines
Deal found 2/10$911

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 February 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$447
(Ticket)

One-way from

$243
(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.
Search Deals
From Seattle/Tacoma Intl to Trondheim Vaernes
Search Deals
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 February 13, 2026.
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

Mon 3/30

5:30 pm-11:35 am

1 stop33h 05m

Trondheim Vaernes

Mon 4/6

6:00 am-4:30 pm

1 stop19h 30m

$447

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 3/29

5:30 pm-10:50 pm

1 stop20h 20m

Trondheim Vaernes

Sun 4/5

6:00 am-11:45 am

1 stop14h 45m

$477

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 3/30

6:00 am-11:35 am

2 stops20h 35m

Trondheim Vaernes

Mon 4/6

6:00 am-4:30 pm

1 stop19h 30m

$482

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 3/5

7:10 am-4:35 pm

2 stops24h 25m

Trondheim Vaernes

Thu 3/12

6:15 am-12:35 pm

1 stop14h 20m

$482

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 3/5

3:05 pm-10:55 pm

1 stop22h 50m

Trondheim Vaernes

Thu 3/12

6:15 am-12:35 pm

1 stop14h 20m

$618

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 3/30

7:20 am-9:40 am

2 stops17h 20m

Trondheim Vaernes

Mon 4/6

5:45 pm-10:24 pm

2 stops37h 39m

$662

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 3/29

7:20 am-11:35 am

2 stops19h 15m

Trondheim Vaernes

Sun 4/5

6:00 am-11:45 am

1 stop14h 45m

$667

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Fri 3/27

4:05 pm-10:35 am

1 stop34h 30m

Trondheim Vaernes

Fri 4/3

12:10 pm-11:45 am

1 stop32h 35m

$837

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Fri 3/27

7:00 pm-12:35 pm

2 stops33h 35m

Trondheim Vaernes

Fri 4/3

6:25 am-5:55 pm

2 stops20h 30m

$868

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 2/23

11:17 am-9:40 am

2 stops37h 23m

Trondheim Vaernes

Fri 2/27

7:45 pm-10:25 pm

2 stops35h 40m

$911

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 13 results
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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 February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Trondheim flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 and Delta can get you from Seattle to Trondheim in just under 20h 35m. Your travel time can differ by up to 12h 30m. 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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