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$593+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$593
(Priceline)
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 September 17, 2025.

This FlightHub deal was found by Cheapflights users on 9/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/211:39 pmSEA - TRD
2 stops39h 51mScandinavian Airlines
Fri 1/25:30 amTRD - SEA
2 stops27h 28mScandinavian Airlines
Deal found 9/17$1,698
This KLM deal was found by Cheapflights users on 9/17. 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 12/213:05 pmSEA - TRD
1 stop22h 50mKLM
Fri 1/26:15 amTRD - SEA
1 stop14h 35mKLM
Deal found 9/17$2,211

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 September 17, 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 3/1

12:00 pm-2:30 pm

2 stops41h 30m

Trondheim Vaernes

Sat 3/21

7:45 pm-10:16 pm

2 stops34h 31m

$593

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 3/1

3:05 pm-4:35 pm

1 stop16h 30m

Trondheim Vaernes

Sat 3/21

5:15 pm-12:35 pm

1 stop27h 20m

$786

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 3/1

3:05 pm-4:35 pm

1 stop16h 30m

Trondheim Vaernes

Sat 3/21

6:15 am-6:10 pm

2 stops19h 55m

$850

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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?

    Scandinavian Airlines, KLM, and Delta can get you from Seattle to Trondheim in just under 16h 30m. Your travel time can differ by up to 25h. 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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