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.

$631 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 - 9:15 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

44h 20m2 stops Kastrup Copenhagen Bergen Flesland

12:45 pm - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

34h 00m2 stops Bergen Flesland Kastrup Copenhagen

$627Scandinavian Airlines

Fri, Sep 25 - Fri, Oct 2

3:55 pm - 2:25 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

13h 30m1 stop Kastrup Copenhagen

12:45 pm - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

34h 00m2 stops Bergen Flesland Kastrup Copenhagen

$629Scandinavian Airlines

Fri, Sep 25 - Fri, Oct 2

11:08 pm - 12:35 amSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

40h 27m2 stops Boston Logan Intl Kastrup Copenhagen

6:25 pm - 1:45 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

52h 20m2 stops Oslo Gardermoen Kastrup Copenhagen

$631Scandinavian Airlines

Mon, Sep 14 - Wed, Sep 30

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

17h 00m1 stop Amsterdam Schiphol

6:20 am - 11:47 amTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

14h 27m1 stop Amsterdam Schiphol

$632Delta

Mon, Nov 2 - Thu, Nov 12

3:55 pm - 2:25 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

13h 30m1 stop Kastrup Copenhagen

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

27h 00m1 stop Kastrup Copenhagen

$632Scandinavian Airlines

Fri, Sep 25 - Fri, Oct 2

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

$633KLM

Wed, Dec 30 - Sat, Jan 16

8:50 am - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

22h 45m2 stops Salt Lake City Amsterdam Schiphol

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

14h 30m1 stop Amsterdam Schiphol

$637Delta

Wed, Dec 30 - Sat, Jan 16

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

17h 00m1 stop Amsterdam Schiphol

6:20 am - 2:44 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

17h 24m2 stops Amsterdam Schiphol Salt Lake City

$642Delta

Mon, Nov 2 - Thu, Nov 12

8:50 am - 4:35 pmSEA Seattle/Tacoma Intl-TRD Trondheim Vaernes

22h 45m2 stops Salt Lake City Amsterdam Schiphol

6:20 am - 4:35 pmTRD Trondheim Vaernes-SEA Seattle/Tacoma Intl

19h 15m2 stops Amsterdam Schiphol Minneapolis St Paul

$647Delta

Wed, Dec 30 - Sat, Jan 16

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

17h 50m1 stop Amsterdam Schiphol

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

14h 52m1 stop Amsterdam Schiphol

$664KLM

Mon, Oct 5 - Fri, Oct 9

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KLM flights from Seattle to Trondheim

Our best KLM deals on Seattle to Trondheim flight tickets

KLM

Dec 30

SEA2:35 pmSeattle/Tacoma Intl

17h 00m

1 stop

TRD4:35 pmTrondheim Vaernes

Jan 16

TRD6:20 amTrondheim Vaernes

14h 30m

1 stop

SEA11:50 amSeattle/Tacoma Intl

$633

KLM

Oct 5

SEA1:45 pmSeattle/Tacoma Intl

17h 50m

1 stop

TRD4:35 pmTrondheim Vaernes

Oct 9

TRD6:00 amTrondheim Vaernes

14h 52m

1 stop

SEA11:52 amSeattle/Tacoma Intl

$664

KLM

Sep 14

SEA5:45 pmSeattle/Tacoma Intl

20h 05m

1 stop

TRD10:50 pmTrondheim Vaernes

Sep 30

TRD6:00 amTrondheim Vaernes

14h 47m

1 stop

SEA11:47 amSeattle/Tacoma Intl

$997

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

14h 27m

1 stop

SEA11:47 amSeattle/Tacoma Intl

$632

Delta

Dec 30

SEA8:50 amSeattle/Tacoma Intl

22h 45m

2 stops

TRD4:35 pmTrondheim Vaernes

Jan 16

TRD6:20 amTrondheim Vaernes

14h 30m

1 stop

SEA11:50 amSeattle/Tacoma Intl

$637

Delta

Nov 2

SEA2:35 pmSeattle/Tacoma Intl

17h 00m

1 stop

TRD4:35 pmTrondheim Vaernes

Nov 12

TRD6:20 amTrondheim Vaernes

17h 24m

2 stops

SEA2:44 pmSeattle/Tacoma Intl

$642

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-9:15 pm

2 stops44h 20m

Trondheim Vaernes

Fri 10/2

12:45 pm-1:45 pm

2 stops34h 00m

$627

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-2:25 pm

1 stop13h 30m

Trondheim Vaernes

Fri 10/2

12:45 pm-1:45 pm

2 stops34h 00m

$629

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 9/14

11:08 pm-12:35 am

2 stops40h 27m

Trondheim Vaernes

Wed 9/30

6:25 pm-1:45 pm

2 stops52h 20m

$631

Quickest round-trip

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

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

$632

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Fri 9/25

3:55 pm-2:25 pm

1 stop13h 30m

Trondheim Vaernes

Fri 10/2

7:45 pm-1:45 pm

1 stop27h 00m

$632

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/30

2:35 pm-4:35 pm

1 stop17h 00m

Trondheim Vaernes

Sat 1/16

6:20 am-11:50 am

1 stop14h 30m

$633

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/30

8:50 am-4:35 pm

2 stops22h 45m

Trondheim Vaernes

Sat 1/16

6:20 am-11:50 am

1 stop14h 30m

$637

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 11/2

2:35 pm-4:35 pm

1 stop17h 00m

Trondheim Vaernes

Thu 11/12

6:20 am-2:44 pm

2 stops17h 24m

$642

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Wed 12/30

8:50 am-4:35 pm

2 stops22h 45m

Trondheim Vaernes

Sat 1/16

6:20 am-4:35 pm

2 stops19h 15m

$647

SeattleTrondheim

SEA Seattle/Tacoma Intl - TRD Trondheim Vaernes

SEATRD

Seattle/Tacoma Intl

Mon 10/5

1:45 pm-4:35 pm

1 stop17h 50m

Trondheim Vaernes

Fri 10/9

6:00 am-11:52 am

1 stop14h 52m

$664

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	32h 20m
Direct flights	None

The fastest flight from Seattle to Trondheim takes 32h 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 32h 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 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 1,556 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.