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Trondheim

$546+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRD
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
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 March 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$603
(KLM)

One-way from

$546
(KLM)
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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One-way flight 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 March 3, 2025.

This KLM deal was found by Cheapflights users on 3/2. 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.
Wed 4/166:10 pmSEA - TRD
1 stop13h 20mKLM
Wed 4/235:05 pmTRD - SEA
1 stop31h 55mKLM
Deal found 3/2$603
This Billigflug deal was found by Cheapflights users on 3/2. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/167:15 amSEA - TRD
2 stops19h 15mMultiple Airlines
Wed 4/236:00 amTRD - SEA
2 stops27h 02mMultiple Airlines
Deal found 3/2$608
This Delta deal was found by Cheapflights users on 3/2. 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 4/271:55 pmSEA - TRD
1 stop17h 35mDelta
Fri 5/166:00 amTRD - SEA
1 stop14h 40mDelta
Deal found 3/2$625
This Gurufare deal was found by Cheapflights users on 3/2. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/17:35 amSEA - TRD
2 stops17h 00mScandinavian Airlines
Tue 5/1310:35 amTRD - SEA
2 stops21h 05mScandinavian Airlines
Deal found 3/2$856

Find flights from Seattle to Trondheim within your budget

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 March 3, 2025.

Fly from

Seattle

Fly to

Trondheim

Route

Depart

Return

Price

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 4/16

6:10 pm-4:30 pm

1 stop13h 20m

Trondheim Vaernes

Wed 4/23

5:05 pm-4:00 pm

1 stop31h 55m

$603

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Wed 4/16

7:15 am-11:30 am

2 stops19h 15m

Trondheim Vaernes

Wed 4/23

6:00 am-12:02 am

2 stops27h 02m

$608

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 4/27

1:55 pm-4:30 pm

1 stop17h 35m

Trondheim Vaernes

Fri 5/16

6:00 am-11:40 am

1 stop14h 40m

$625

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 5/1

7:35 am-9:35 am

2 stops17h 00m

Trondheim Vaernes

Tue 5/13

10:35 am-10:40 pm

2 stops21h 05m

$856

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 4/17

2:10 pm-10:50 pm

1 stop23h 40m

$546

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 4/17

7:23 am-11:30 am

2 stops19h 07m

$550

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 4/17

11:25 am-5:55 pm

3 stops21h 30m

$3,151

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

  • 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.

Travel insights for flights from Seattle to Trondheim

Get recent, data-driven insights about flights from Seattle to Trondheim including ideal travel times, pricing trends, and more.

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 March 3, 2025.
Delta
8.0
Very good
8,068 reviews

Comfort

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,068 reviews
Delta
8.0
Very good
8,068 reviews

Comfort

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,322 reviews
Delta
8.0
Very good
8,068 reviews

Comfort

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Scandinavian Airlines
7.3
Good
1,314 reviews
Delta
8.0
Very good
8,068 reviews

Comfort

8.0

Crew

8.5

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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, KLM ($603), Delta ($625), and Scandinavian Airlines ($856) offers the cheapest pricing from Seattle to Trondheim.

  • What are the cheapest airlines to fly from Seattle to Trondheim one-way?

    To fly one-way, consider booking your trip with KLM, which is currently one of the cheapest options available, starting at $546. Delta flights start at $550 while deals on Scandinavian Airlines start at $3,151 one-way.

  • 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 March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$741Average$1,421FlexibilityNo cancel feeOn-time75%
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