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 October 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.

$670 Cheap Flights from Seattle to Trondheim in 2026/27

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.

2:35 pm - 2:15 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

14h 40m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

9:25 am - 5:00 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

16h 35m2 stops Oslo Gardermoen Reykjavik Keflavik Intl

$670Multiple Airlines

Wed, Dec 2 - Wed, Dec 9

7:20 am - 2:25 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

22h 05m2 stops Chicago O'Hare Intl Kastrup Copenhagen

5:55 pm - 10:02 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

37h 07m2 stops Oslo Gardermoen New York John F Kennedy Intl

$684Scandinavian Airlines

Wed, Apr 14 - Sun, Apr 18

7:20 am - 2:25 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

22h 05m2 stops San Francisco Kastrup Copenhagen

5:55 pm - 10:02 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

37h 07m2 stops Oslo Gardermoen New York John F Kennedy Intl

$684Scandinavian Airlines

Wed, Apr 14 - Sun, Apr 18

10:39 am - 3:20 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

19h 41m3 stops Chicago O'Hare Intl Kastrup Copenhagen Oslo Gardermoen

7:45 am - 8:24 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

21h 39m3 stops Oslo Gardermoen Kastrup Copenhagen San Francisco

$696Scandinavian Airlines

Wed, Dec 2 - Wed, Dec 9

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

39h 05m2 stops Washington, D.C. Dulles Intl Amsterdam Schiphol

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

14h 30m1 stop Amsterdam Schiphol

$729Delta

Wed, Dec 2 - Wed, Dec 9

7:20 am - 2:30 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

22h 10m2 stops Chicago O'Hare Intl Kastrup Copenhagen

7:45 am - 8:24 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

21h 39m3 stops Oslo Gardermoen Kastrup Copenhagen San Francisco

$760Scandinavian Airlines

Wed, Dec 2 - Wed, Dec 9

1:19 pm - 8:50 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

34h 31m2 stops Chicago O'Hare Intl Helsinki-Vantaa

8:50 am - 4:00 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

16h 10m1 stop Helsinki-Vantaa

$1,067Finnair

Wed, Apr 14 - Sun, Apr 18

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

17h 00m1 stop Amsterdam Schiphol

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

14h 30m1 stop Amsterdam Schiphol

$4,638KLM

Mon, Dec 21 - Sat, Jan 2

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Delta flights from Seattle to Trondheim

Our best Delta deals on Seattle to Trondheim flight tickets

Delta

Dec 2

SEA4:30 pmSeattle/Tacoma Intl

39h 05m

2 stops

TRD4:35 pmTrondheim Vaernes

Dec 9

TRD6:20 amTrondheim Vaernes

14h 30m

1 stop

SEA11:50 amSeattle/Tacoma Intl

$729

Delta

Dec 21

SEA2:35 pmSeattle/Tacoma Intl

17h 00m

1 stop

TRD4:35 pmTrondheim Vaernes

Jan 2

TRD6:20 amTrondheim Vaernes

21h 33m

2 stops

SEA6:53 pmSeattle/Tacoma Intl

$4,126

Delta

Dec 21

SEA2:35 pmSeattle/Tacoma Intl

17h 00m

1 stop

TRD4:35 pmTrondheim Vaernes

Jan 2

TRD6:20 amTrondheim Vaernes

21h 33m

2 stops

SEA6:53 pmSeattle/Tacoma Intl

$4,127

Scandinavian Airlines flights from Seattle to Trondheim

Our best Scandinavian Airlines deals on Seattle to Trondheim flight tickets

Scandinavian Airlines

Apr 14

SEA7:20 amSeattle/Tacoma Intl

22h 05m

2 stops

TRD2:25 pmTrondheim Vaernes

Apr 18

TRD5:55 pmTrondheim Vaernes

37h 07m

2 stops

SEA10:02 pmSeattle/Tacoma Intl

$684

Scandinavian Airlines

Dec 2

SEA10:39 amSeattle/Tacoma Intl

19h 41m

3 stops

TRD3:20 pmTrondheim Vaernes

Dec 9

TRD7:45 amTrondheim Vaernes

21h 39m

3 stops

SEA8:24 pmSeattle/Tacoma Intl

$696

Scandinavian Airlines

Dec 2

SEA7:20 amSeattle/Tacoma Intl

22h 10m

2 stops

TRD2:30 pmTrondheim Vaernes

Dec 9

TRD7:45 amTrondheim Vaernes

21h 39m

3 stops

SEA8:24 pmSeattle/Tacoma Intl

$760

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/2

2:35 pm-2:15 pm

2 stops14h 40m

Trondheim Vaernes

Wed 12/9

9:25 am-5:00 pm

2 stops16h 35m

$670

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 4/14

7:20 am-2:25 pm

2 stops22h 05m

Trondheim Vaernes

Sun 4/18

5:55 pm-10:02 pm

2 stops37h 07m

$684

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 4/14

7:20 am-2:25 pm

2 stops22h 05m

Trondheim Vaernes

Sun 4/18

5:55 pm-10:02 pm

2 stops37h 07m

$684

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/2

10:39 am-3:20 pm

3 stops19h 41m

Trondheim Vaernes

Wed 12/9

7:45 am-8:24 pm

3 stops21h 39m

$696

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/2

4:30 pm-4:35 pm

2 stops39h 05m

Trondheim Vaernes

Wed 12/9

6:20 am-11:50 am

1 stop14h 30m

$729

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/2

7:20 am-2:30 pm

2 stops22h 10m

Trondheim Vaernes

Wed 12/9

7:45 am-8:24 pm

3 stops21h 39m

$760

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 4/14

1:19 pm-8:50 am

2 stops34h 31m

Trondheim Vaernes

Sun 4/18

8:50 am-4:00 pm

1 stop16h 10m

$1,067

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 12/21

2:35 pm-4:35 pm

1 stop17h 00m

Trondheim Vaernes

Sat 1/2

6:20 am-11:50 am

1 stop14h 30m

$4,638

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	$670
Fastest flight time	18h 20m
Direct flights	None

The best flight deal from Seattle to Trondheim found on momondo in the last 72 hours is $670

The fastest flight from Seattle to Trondheim takes 18h 20m

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 18h 20m, 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 October 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 1,592 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.