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 September 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.

$527 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.

2:25 pm - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

17h 10m1 stop Amsterdam Schiphol

6:20 am - 11:50 amTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

14h 30m1 stop Amsterdam Schiphol

$624KLM

Mon, Jan 11 - Fri, Jan 22

11:25 am - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

20h 10m2 stops Salt Lake City Amsterdam Schiphol

6:20 am - 11:50 amTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

14h 30m1 stop Amsterdam Schiphol

$629Delta

Mon, Jan 11 - Fri, Jan 22

11:25 am - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

20h 10m2 stops Salt Lake City Amsterdam Schiphol

6:20 am - 6:38 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

21h 18m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$639Delta

Mon, Jan 11 - Fri, Jan 22

7:10 pm - 11:00 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

19h 50m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

7:15 am - 6:00 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

18h 45m2 stops Oslo Gardermoen Reykjavik Keflavik Intl

$653Multiple Airlines

Sat, Oct 24 - Sat, Oct 31

7:24 am - 9:40 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

17h 16m2 stops Boston Logan Intl Kastrup Copenhagen

4:45 pm - 11:04 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

39h 19m2 stops Oslo Gardermoen New York John F Kennedy Intl

$686Scandinavian Airlines

Thu, Oct 15 - Mon, Oct 19

7:16 am - 12:35 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

32h 19m2 stops San Francisco Kastrup Copenhagen

4:45 pm - 11:04 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

39h 19m2 stops Oslo Gardermoen New York John F Kennedy Intl

$686Scandinavian Airlines

Thu, Oct 15 - Mon, Oct 19

2:30 pm - 8:30 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

21h 00m3 stops Los Angeles Los Angeles Kastrup Copenhagen Oslo Gardermoen

10:15 am - 10:04 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

20h 49m2 stops Kastrup Copenhagen Boston Logan Intl

$725Scandinavian Airlines

Mon, Jan 11 - Fri, Jan 22

7:24 am - 10:40 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

18h 16m2 stops Boston Logan Intl Kastrup Copenhagen

8:20 am - 8:04 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

19h 44m3 stops Oslo Gardermoen Kastrup Copenhagen San Francisco

$863Scandinavian Airlines

Sat, Oct 24 - Sat, Oct 31

3:25 pm - 5:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

17h 10m1 stop Amsterdam Schiphol

6:20 am - 12:47 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

14h 27m1 stop Amsterdam Schiphol

$1,415KLM

Sat, Oct 24 - Sat, Oct 31

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Scandinavian Airlines flights from Seattle to Trondheim

Our best Scandinavian Airlines deals on Seattle to Trondheim flight tickets

Scandinavian Airlines

Oct 15

SEA7:24 amSeattle/Tacoma Intl

17h 16m

2 stops

TRD9:40 amTrondheim Vaernes

Oct 19

TRD4:45 pmTrondheim Vaernes

39h 19m

2 stops

SEA11:04 pmSeattle/Tacoma Intl

$686

Scandinavian Airlines

Jan 11

SEA2:30 pmSeattle/Tacoma Intl

21h 00m

3 stops

TRD8:30 pmTrondheim Vaernes

Jan 22

TRD10:15 amTrondheim Vaernes

20h 49m

2 stops

SEA10:04 pmSeattle/Tacoma Intl

$725

Scandinavian Airlines

Oct 24

SEA7:24 amSeattle/Tacoma Intl

18h 16m

2 stops

TRD10:40 amTrondheim Vaernes

Oct 31

TRD8:20 amTrondheim Vaernes

19h 44m

3 stops

SEA8:04 pmSeattle/Tacoma Intl

$863

KLM flights from Seattle to Trondheim

Our best KLM deals on Seattle to Trondheim flight tickets

KLM

Jan 11

SEA2:25 pmSeattle/Tacoma Intl

17h 10m

1 stop

TRD4:35 pmTrondheim Vaernes

Jan 22

TRD6:20 amTrondheim Vaernes

14h 30m

1 stop

SEA11:50 amSeattle/Tacoma Intl

$624

KLM

Oct 24

SEA3:25 pmSeattle/Tacoma Intl

17h 10m

1 stop

TRD5:35 pmTrondheim Vaernes

Oct 31

TRD6:20 amTrondheim Vaernes

14h 27m

1 stop

SEA12:47 pmSeattle/Tacoma Intl

$1,415

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 1/11

2:25 pm-4:35 pm

1 stop17h 10m

Trondheim Vaernes

Fri 1/22

6:20 am-11:50 am

1 stop14h 30m

$624

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 1/11

11:25 am-4:35 pm

2 stops20h 10m

Trondheim Vaernes

Fri 1/22

6:20 am-11:50 am

1 stop14h 30m

$629

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 1/11

11:25 am-4:35 pm

2 stops20h 10m

Trondheim Vaernes

Fri 1/22

6:20 am-6:38 pm

2 stops21h 18m

$639

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/24

7:10 pm-11:00 pm

2 stops19h 50m

Trondheim Vaernes

Sat 10/31

7:15 am-6:00 pm

2 stops18h 45m

$653

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Thu 10/15

7:24 am-9:40 am

2 stops17h 16m

Trondheim Vaernes

Mon 10/19

4:45 pm-11:04 pm

2 stops39h 19m

$686

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Thu 10/15

7:16 am-12:35 am

2 stops32h 19m

Trondheim Vaernes

Mon 10/19

4:45 pm-11:04 pm

2 stops39h 19m

$686

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 1/11

2:30 pm-8:30 pm

3 stops21h 00m

Trondheim Vaernes

Fri 1/22

10:15 am-10:04 pm

2 stops20h 49m

$725

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/24

7:24 am-10:40 am

2 stops18h 16m

Trondheim Vaernes

Sat 10/31

8:20 am-8:04 pm

3 stops19h 44m

$863

Quickest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Sat 10/24

3:25 pm-5:35 pm

1 stop17h 10m

Trondheim Vaernes

Sat 10/31

6:20 am-12:47 pm

1 stop14h 27m

$1,415

Cheapest one-way

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Tue 12/15

2:35 pm-7:35 am

2 stops32h 00m

$527

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted 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	$527
Fastest flight time	17h 10m
Direct flights	None

The best one-way flight to Trondheim from Seattle in the past 72 hours is $527. The best round-trip flight deal from Seattle to Trondheim found on momondo in the last 72 hours is $624.

The fastest flight from Seattle to Trondheim takes 17h 10m

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 10m, 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 September 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 1,576 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.