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Trondheim

$575+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
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 August 16, 2025.

Round-trip from

$575
(CheapOair)
From Seattle/Tacoma Intl to Trondheim Vaernes
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Find 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 August 16, 2025.

This CheapOair deal was found by Cheapflights users on 8/15. 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 9/144:20 pmSEA - TRD
1 stop32h 15mScandinavian Airlines
Sun 9/213:00 pmTRD - SEA
2 stops40h 25mScandinavian Airlines
Deal found 8/15$575
This Delta deal was found by Cheapflights users on 8/14. 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.
Tue 12/93:05 pmSEA - TRD
1 stop16h 30mDelta
Thu 12/256:15 amTRD - SEA
1 stop14h 35mDelta
Deal found 8/14$616
This Delta deal was found by Cheapflights users on 8/14. 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 12/157:20 pmSEA - TRD
2 stops36h 15mDelta
Thu 12/256:15 amTRD - SEA
1 stop14h 35mDelta
Deal found 8/14$644
This Delta deal was found by Cheapflights users on 8/14. 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 12/117:20 amSEA - TRD
2 stops24h 15mDelta
Thu 12/256:15 amTRD - SEA
1 stop14h 35mDelta
Deal found 8/14$671
This Delta deal was found by Cheapflights users on 8/14. 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.
Sat 12/137:20 pmSEA - TRD
2 stops36h 15mDelta
Thu 12/256:15 amTRD - SEA
1 stop14h 35mDelta
Deal found 8/14$686
This Delta deal was found by Cheapflights users on 8/14. 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.
Tue 12/93:05 pmSEA - TRD
1 stop16h 30mDelta
Mon 12/296:15 amTRD - SEA
2 stops19h 35mDelta
Deal found 8/14$692

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 August 16, 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 9/14

4:20 pm-9:35 am

1 stop32h 15m

Trondheim Vaernes

Sun 9/21

3:00 pm-10:25 pm

2 stops40h 25m

$575

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 10/1

2:20 pm-4:40 pm

2 stops17h 20m

$618

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 10/1

4:20 pm-7:15 pm

1 stop17h 55m

$2,919

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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.

  • 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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