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Trondheim

$525+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$525
(Gotogate)
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 junio 12, 2025.

This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/274:00 pmSEA - TRD
2 stops32h 15mScandinavian Airlines
dom. 8/38:30 pmTRD - SEA
2 stops26h 20mScandinavian Airlines
Deal found 6/12$525
This Delta deal was found by Cheapflights users on 6/11. 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.
lun. 7/289:45 pmSEA - TRD
2 stops26h 50mDelta
mié. 8/66:00 amTRD - SEA
2 stops23h 55mDelta
Deal found 6/11$654
This KLM deal was found by Cheapflights users on 6/10. 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.
lun. 7/215:35 pmSEA - TRD
1 stop32h 55mKLM
mié. 7/3012:05 pmTRD - SEA
1 stop32h 30mKLM
Deal found 6/10$775
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/304:00 pmSEA - TRD
1 stop20h 55mMultiple Airlines
dom. 8/35:45 amTRD - SEA
1 stop17h 05mMultiple Airlines
Deal found 6/11$921

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 junio 12, 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

dom. 7/27

4:00 pm-9:15 am

2 stops32h 15m

Trondheim Vaernes

dom. 8/3

8:30 pm-1:50 pm

2 stops26h 20m

$525

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

lun. 7/28

9:45 pm-9:35 am

2 stops26h 50m

Trondheim Vaernes

mié. 8/6

6:00 am-8:55 pm

2 stops23h 55m

$654

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

lun. 7/21

5:35 pm-11:30 am

1 stop32h 55m

Trondheim Vaernes

mié. 7/30

12:05 pm-11:35 am

1 stop32h 30m

$775

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

mié. 7/30

4:00 pm-9:55 pm

1 stop20h 55m

Trondheim Vaernes

dom. 8/3

5:45 am-1:50 pm

1 stop17h 05m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Trondheim

Rainfall in Trondheim by month

Plan your trip to Trondheim by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Trondheim ranges from 1.8 - 4.3 inches per month. September is typically the wettest month, when rainfall can reach 4.3 in. April is typically the driest time to visit Trondheim when rainfall is around 1.8 in.

Temperature in Trondheim by month

Plan your trip to Trondheim by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Trondheim, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 55.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

Reviews of airlines servicing Trondheim

Get insights into the airlines that provide service to Trondheim. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Trondheim. Reviews last updated junio 12, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,387 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying from Seattle to Trondheim round-trip?

    According to our current data, Scandinavian Airlines ($525), Delta ($654), and KLM ($775) offers the cheapest pricing from Seattle to Trondheim.

  • 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.

See more FAQs

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Top airline flying from Seattle to Trondheim

Discover the top airline that operate flights from Seattle to Trondheim. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$704Average$859FlexibilityNo cancel feeOn-time75%

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