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.

$494 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 - 7:35 pm

SEA

TRD

18h 40m

2 stops

7:45 pm - 1:45 pm

TRD

SEA

27h 00m

1 stop

$494Scandinavian Airlines

Sat, Sep 19 - Thu, Sep 24

3:55 pm - 4:30 pm

SEA

TRD

15h 35m

2 stops

6:40 pm - 1:45 pm

TRD

SEA

28h 05m

2 stops

$513Scandinavian Airlines

Sat, Sep 19 - Thu, Sep 24

2:35 pm - 4:35 pm

SEA

TRD

17h 00m

1 stop

6:20 am - 11:47 am

TRD

SEA

14h 27m

1 stop

$631KLM

Mon, Nov 2 - Thu, Nov 12

2:35 pm - 4:35 pm

SEA

TRD

17h 00m

1 stop

6:20 am - 4:51 pm

TRD

SEA

19h 31m

2 stops

$641Delta

Mon, Nov 2 - Thu, Nov 12

1:50 pm - 4:35 pm

SEA

TRD

17h 45m

1 stop

6:00 am - 4:27 pm

TRD

SEA

19h 27m

1 stop

$652KLM

Sun, Aug 16 - Fri, Aug 21

6:00 am - 11:35 am

SEA

TRD

20h 35m

2 stops

6:00 am - 4:35 pm

TRD

SEA

19h 35m

1 stop

$672Delta

Thu, Sep 10 - Thu, Sep 17

3:25 pm - 4:35 pm

SEA

TRD

17h 10m

1 stop

6:20 am - 8:04 pm

TRD

SEA

21h 44m

2 stops

$672Delta

Sun, Oct 25 - Fri, Oct 30

3:25 pm - 4:35 pm

SEA

TRD

17h 10m

1 stop

6:20 am - 8:04 pm

TRD

SEA

21h 44m

2 stops

$678Delta

Sun, Oct 25 - Fri, Oct 30

11:50 am - 4:35 pm

SEA

TRD

20h 45m

2 stops

6:20 am - 4:37 pm

TRD

SEA

18h 17m

2 stops

$682Delta

Sun, Oct 25 - Fri, Oct 30

6:00 am - 11:35 am

SEA

TRD

20h 35m

2 stops

6:00 am - 6:36 pm

TRD

SEA

21h 36m

2 stops

$682Delta

Thu, Sep 10 - Thu, Sep 17

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KLM flights from Seattle to Trondheim

Our best KLM deals on Seattle to Trondheim flight tickets

KLM

Nov 2

SEA2:35 pmSeattle/Tacoma Intl

17h 00m

1 stop

TRD4:35 pmTrondheim Vaernes

Nov 12

TRD6:20 amTrondheim Vaernes

14h 27m

1 stop

SEA11:47 amSeattle/Tacoma Intl

$631

KLM

Aug 16

SEA1:50 pmSeattle/Tacoma Intl

17h 45m

1 stop

TRD4:35 pmTrondheim Vaernes

Aug 21

TRD6:00 amTrondheim Vaernes

19h 27m

1 stop

SEA4:27 pmSeattle/Tacoma Intl

$652

KLM

Sep 10

SEA1:50 pmSeattle/Tacoma Intl

17h 45m

1 stop

TRD4:35 pmTrondheim Vaernes

Sep 17

TRD6:00 amTrondheim Vaernes

14h 47m

1 stop

SEA11:47 amSeattle/Tacoma Intl

$769

Delta flights from Seattle to Trondheim

Our best Delta deals on Seattle to Trondheim flight tickets

Delta

Nov 2

SEA2:35 pmSeattle/Tacoma Intl

17h 00m

1 stop

TRD4:35 pmTrondheim Vaernes

Nov 12

TRD6:20 amTrondheim Vaernes

19h 31m

2 stops

SEA4:51 pmSeattle/Tacoma Intl

$641

Delta

Sep 10

SEA6:00 amSeattle/Tacoma Intl

20h 35m

2 stops

TRD11:35 amTrondheim Vaernes

Sep 17

TRD6:00 amTrondheim Vaernes

19h 35m

1 stop

SEA4:35 pmSeattle/Tacoma Intl

$672

Delta

Oct 25

SEA3:25 pmSeattle/Tacoma Intl

17h 10m

1 stop

TRD4:35 pmTrondheim Vaernes

Oct 30

TRD6:20 amTrondheim Vaernes

21h 44m

2 stops

SEA8:04 pmSeattle/Tacoma Intl

$678

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-7:35 pm

2 stops18h 40m

Trondheim Vaernes

Thu 9/24

7:45 pm-1:45 pm

1 stop27h 00m

$494

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sat 9/19

3:55 pm-4:30 pm

2 stops15h 35m

Trondheim Vaernes

Thu 9/24

6:40 pm-1:45 pm

2 stops28h 05m

$513

Quickest round-trip

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 11/2

2:35 pm-4:35 pm

1 stop17h 00m

Trondheim Vaernes

Thu 11/12

6:20 am-11:47 am

1 stop14h 27m

$631

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Mon 11/2

2:35 pm-4:35 pm

1 stop17h 00m

Trondheim Vaernes

Thu 11/12

6:20 am-4:51 pm

2 stops19h 31m

$641

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 8/16

1:50 pm-4:35 pm

1 stop17h 45m

Trondheim Vaernes

Fri 8/21

6:00 am-4:27 pm

1 stop19h 27m

$652

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 9/10

6:00 am-11:35 am

2 stops20h 35m

Trondheim Vaernes

Thu 9/17

6:00 am-4:35 pm

1 stop19h 35m

$672

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 10/25

3:25 pm-4:35 pm

1 stop17h 10m

Trondheim Vaernes

Fri 10/30

6:20 am-8:04 pm

2 stops21h 44m

$672

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 10/25

3:25 pm-4:35 pm

1 stop17h 10m

Trondheim Vaernes

Fri 10/30

6:20 am-8:04 pm

2 stops21h 44m

$678

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Sun 10/25

11:50 am-4:35 pm

2 stops20h 45m

Trondheim Vaernes

Fri 10/30

6:20 am-4:37 pm

2 stops18h 17m

$682

SeattleTrondheim

SEA - TRD

SEATRD

Seattle/Tacoma Intl

Thu 9/10

6:00 am-11:35 am

2 stops20h 35m

Trondheim Vaernes

Thu 9/17

6:00 am-6:36 pm

2 stops21h 36m

$682

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

Fastest flight time	17h 00m
Direct flights	None

The fastest flight from Seattle to Trondheim takes 17h 00m

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 00m, 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 1,552 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.