How do I get Price Alerts for flights from Seattle to Trondheim?

Price Alerts will notify you by email when the price for flights to Trondheim from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

How can I save money on flights from Seattle to Trondheim with momondo?

By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport were last updated today.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport?

As of August 2026, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport.

What documentation or ID do you need to fly to Trondheim Vaernes Airport?

The required travel and health documents for your Trondheim Vaernes Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Trondheim Vaernes Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$411 Cheap Flights from Seattle to Trondheim in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Trondheim

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:55 pm - 10:45 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

21h 50m2 stops Kastrup Copenhagen Bergen Flesland

7:55 pm - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

26h 50m2 stops Oslo Gardermoen Kastrup Copenhagen

$411Scandinavian Airlines

Sat, Oct 3 - Sat, Oct 10

3:55 pm - 12:50 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

11h 55m1 stop Kastrup Copenhagen

7:55 pm - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

26h 50m2 stops Oslo Gardermoen Kastrup Copenhagen

$412Scandinavian Airlines

Sat, Oct 3 - Sat, Oct 10

3:55 pm - 12:50 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

11h 55m1 stop Kastrup Copenhagen

10:15 am - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

12h 30m1 stop Kastrup Copenhagen

$416Scandinavian Airlines

Sat, Oct 3 - Sat, Oct 10

3:55 pm - 7:25 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

18h 30m2 stops Kastrup Copenhagen Oslo Gardermoen

4:55 pm - 11:04 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

39h 09m2 stops Oslo Gardermoen New York John F Kennedy Intl

$573Scandinavian Airlines

Sun, Oct 11 - Tue, Oct 20

3:55 pm - 9:40 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

32h 45m1 stop Kastrup Copenhagen

4:55 pm - 11:04 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

39h 09m2 stops Oslo Gardermoen New York John F Kennedy Intl

$573Scandinavian Airlines

Sun, Oct 11 - Tue, Oct 20

1:45 pm - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

17h 50m1 stop Amsterdam Schiphol

6:00 am - 4:35 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

19h 35m1 stop Amsterdam Schiphol

$665KLM

Tue, Oct 13 - Tue, Oct 20

12:30 pm - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

19h 05m2 stops Los Angeles Amsterdam Schiphol

6:00 am - 11:52 amTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

14h 52m1 stop Amsterdam Schiphol

$669Delta

Tue, Oct 13 - Tue, Oct 20

12:30 pm - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

19h 05m2 stops Los Angeles Amsterdam Schiphol

6:00 am - 6:35 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

21h 35m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$680Delta

Tue, Oct 13 - Tue, Oct 20

3:55 pm - 8:55 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

32h 00m3 stops Kastrup Copenhagen Stockholm Arlanda Oslo Gardermoen

4:00 pm - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

30h 45m3 stops Bergen Flesland Stockholm Arlanda Kastrup Copenhagen

$703Multiple Airlines

Sat, Oct 3 - Sat, Oct 10

5:45 pm - 10:50 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

20h 05m1 stop Amsterdam Schiphol

6:00 am - 11:52 amTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

14h 52m1 stop Amsterdam Schiphol

$765KLM

Sun, Oct 11 - Tue, Oct 20

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Lufthansa flights from Seattle to Trondheim

Our best Lufthansa deals on Seattle to Trondheim flight tickets

Lufthansa

Sep 13

SEA2:10 pmSeattle/Tacoma Intl

18h 10m

1 stop

TRD5:20 pmTrondheim Vaernes

Sep 18

TRD6:20 pmTrondheim Vaernes

26h 35m

1 stop

SEA11:55 amSeattle/Tacoma Intl

$5,445

Lufthansa

Sep 10

SEA2:10 pmSeattle/Tacoma Intl

18h 10m

1 stop

TRD5:20 pmTrondheim Vaernes

Sep 18

TRD6:20 pmTrondheim Vaernes

26h 35m

1 stop

SEA11:55 amSeattle/Tacoma Intl

$5,527

Lufthansa

Sep 13

SEA2:10 pmSeattle/Tacoma Intl

18h 10m

1 stop

TRD5:20 pmTrondheim Vaernes

Sep 22

TRD5:55 pmTrondheim Vaernes

32h 04m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

$5,590

Delta flights from Seattle to Trondheim

Our best Delta deals on Seattle to Trondheim flight tickets

Delta

Oct 13

SEA12:30 pmSeattle/Tacoma Intl

19h 05m

2 stops

TRD4:35 pmTrondheim Vaernes

Oct 20

TRD6:00 amTrondheim Vaernes

14h 52m

1 stop

SEA11:52 amSeattle/Tacoma Intl

$669

Delta

Oct 13

SEA12:30 pmSeattle/Tacoma Intl

19h 05m

2 stops

TRD4:35 pmTrondheim Vaernes

Oct 20

TRD6:00 amTrondheim Vaernes

21h 35m

2 stops

SEA6:35 pmSeattle/Tacoma Intl

$680

Delta

Sep 10

SEA12:35 pmSeattle/Tacoma Intl

19h 00m

2 stops

TRD4:35 pmTrondheim Vaernes

Sep 19

TRD5:30 amTrondheim Vaernes

17h 15m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

$7,472

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/3

3:55 pm-10:45 pm

2 stops21h 50m

Trondheim Vaernes

Sat 10/10

7:55 pm-1:45 pm

2 stops26h 50m

$411

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/3

3:55 pm-12:50 pm

1 stop11h 55m

Trondheim Vaernes

Sat 10/10

7:55 pm-1:45 pm

2 stops26h 50m

$412

Quickest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/3

3:55 pm-12:50 pm

1 stop11h 55m

Trondheim Vaernes

Sat 10/10

10:15 am-1:45 pm

1 stop12h 30m

$416

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sun 10/11

3:55 pm-7:25 pm

2 stops18h 30m

Trondheim Vaernes

Tue 10/20

4:55 pm-11:04 pm

2 stops39h 09m

$573

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sun 10/11

3:55 pm-9:40 am

1 stop32h 45m

Trondheim Vaernes

Tue 10/20

4:55 pm-11:04 pm

2 stops39h 09m

$573

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Tue 10/13

1:45 pm-4:35 pm

1 stop17h 50m

Trondheim Vaernes

Tue 10/20

6:00 am-4:35 pm

1 stop19h 35m

$665

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Tue 10/13

12:30 pm-4:35 pm

2 stops19h 05m

Trondheim Vaernes

Tue 10/20

6:00 am-11:52 am

1 stop14h 52m

$669

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Tue 10/13

12:30 pm-4:35 pm

2 stops19h 05m

Trondheim Vaernes

Tue 10/20

6:00 am-6:35 pm

2 stops21h 35m

$680

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/3

3:55 pm-8:55 am

3 stops32h 00m

Trondheim Vaernes

Sat 10/10

4:00 pm-1:45 pm

3 stops30h 45m

$703

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sun 10/11

5:45 pm-10:50 pm

1 stop20h 05m

Trondheim Vaernes

Tue 10/20

6:00 am-11:52 am

1 stop14h 52m

$765

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Seattle to Trondheim

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Trondheim according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Trondheim (SEA to TRD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Trondheim

Best Price Found	$411
Fastest flight time	17h 15m
Direct flights	None

The best flight deal from Seattle to Trondheim found on momondo in the last 72 hours is $411

The fastest flight from Seattle to Trondheim takes 17h 15m

There are no direct flights from Seattle to Trondheim. There are no popular flight routes from Seattle to Trondheim.

Search flight deals

Frequently asked questions about flying from Seattle to Trondheim

How far is Seattle/Tacoma Intl to Trondheim Vaernes by plane?
Trondheim Vaernes is 4341.0 mi away from Seattle/Tacoma Intl. Flights usually cover this in 17h 15m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport?
As of August 2026, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Trondheim Vaernes Airport.
What documentation or ID do you need to fly to Trondheim Vaernes Airport?
The required travel and health documents for your Trondheim Vaernes Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Trondheim Vaernes Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Seattle to Trondheim?
Based on momondo bookings for flights between Seattle and Trondheim, the leading airline is KLM, making up 100% of the total bookings.

Best airlines flying from Seattle to Trondheim

Compare and see reviews for airlines that fly from Seattle to Trondheim with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $510	Free Cancellation	Rating 7.8 1,562 reviews		Search KLM flights

Frequently asked questions about flying from Seattle to Trondheim

How do I get Price Alerts for flights from Seattle to Trondheim?
Price Alerts will notify you by email when the price for flights to Trondheim from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Seattle to Trondheim with momondo?
By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Trondheim?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Trondheim for you.

Can I find flights from Seattle to Trondheim with flexible booking policies on momondo?

Flights from Seattle to Trondheim with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Trondheim?

Once all potential Seattle to Trondheim flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Trondheim right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Trondheim now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Trondheim and let you know when they change.