SEA - TRD

$539 Find Cheap Flights from Seattle to Trondheim - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$539
Typical prices: $587-$879
Scandinavian Airlines
Thu 10/4Mon 10/8
SEA - TRD • 2 stops
When to travel
May
Cheapest • 13% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Amsterdam Schiphol (AMS)
Cheapest • Avg $845 (round-trip)
Kastrup Copenhagen (CPH)
Shortest trip • 12h 36m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Seattle to Trondheim (SEA-TRD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Trondheim

Sun, Oct 4 - Thu, Oct 8
Scandinavian Airlines Logo
3:55 pm - 4:20 pmSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
39h 25m2 stops Kastrup Copenhagen Oslo Gardermoen
Scandinavian Airlines Logo
6:25 pm - 1:45 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
28h 20m2 stops Oslo Gardermoen Kastrup Copenhagen
$539Scandinavian Airlines
Sun, Oct 4 - Thu, Oct 8
Scandinavian Airlines Logo
3:55 pm - 9:40 amSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
32h 45m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
3:10 pm - 1:45 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
55h 35m2 stops Bergen Flesland Kastrup Copenhagen
$566Scandinavian Airlines
Sun, Oct 4 - Thu, Oct 8
KLM Logo
5:45 pm - 4:35 pmSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
13h 50m1 stop Amsterdam Schiphol
KLM Logo
6:00 am - 11:52 amTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
14h 52m1 stop Amsterdam Schiphol
$567KLM
Sun, Oct 18 - Tue, Oct 27
Multiple Airlines Logo
5:45 pm - 11:35 amSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
32h 50m1 stop Amsterdam Schiphol
Multiple Airlines Logo
6:20 am - 3:54 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
17h 34m2 stops Amsterdam Schiphol London Heathrow
$638Multiple Airlines
Sun, Oct 18 - Tue, Oct 27
Multiple Airlines Logo
5:45 pm - 11:35 amSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
32h 50m1 stop Amsterdam Schiphol
Multiple Airlines Logo
6:20 am - 12:47 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
14h 27m1 stop Amsterdam Schiphol
$648Multiple Airlines
Sun, Oct 18 - Tue, Oct 27
Delta Logo
7:15 am - 11:35 amSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
19h 20m2 stops Chicago O'Hare Intl Amsterdam Schiphol
Delta Logo
6:20 am - 3:54 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
17h 34m2 stops Amsterdam Schiphol London Heathrow
$649Delta
Thu, Nov 26 - Tue, Dec 1
Scandinavian Airlines Logo
10:39 am - 12:40 amSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
29h 01m2 stops Chicago O'Hare Intl Kastrup Copenhagen
Scandinavian Airlines Logo
5:30 am - 10:09 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
25h 39m2 stops Kastrup Copenhagen Los Angeles
$666Scandinavian Airlines
Thu, Nov 26 - Tue, Dec 1
Scandinavian Airlines Logo
7:27 am - 2:30 pmSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
22h 03m2 stops Chicago O'Hare Intl Kastrup Copenhagen
Scandinavian Airlines Logo
6:25 am - 8:24 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
22h 59m3 stops Oslo Gardermoen Kastrup Copenhagen San Francisco
$691Scandinavian Airlines
Thu, Nov 26 - Tue, Dec 1
Scandinavian Airlines Logo
10:39 am - 3:20 pmSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
19h 41m3 stops Chicago O'Hare Intl Kastrup Copenhagen Oslo Gardermoen
Scandinavian Airlines Logo
6:25 am - 8:24 pmTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
22h 59m3 stops Oslo Gardermoen Kastrup Copenhagen San Francisco
$697Scandinavian Airlines
Thu, Nov 26 - Tue, Dec 1
KLM Logo
11:49 am - 4:35 pmSEA  Seattle/Tacoma Intl-TRD Trondheim Vaernes
19h 46m2 stops New York John F Kennedy Intl Amsterdam Schiphol
KLM Logo
6:20 am - 11:50 amTRD  Trondheim Vaernes-SEA Seattle/Tacoma Intl
14h 30m1 stop Amsterdam Schiphol
$927KLM
Booking Insights

Price, demand and travel trends for Seattle to Trondheim flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Seattle to Trondheim?

Round-trip flights from Seattle to Trondheim typically range from $587 to $879. The lowest price found in the past 5 days was $539, on Scandinavian Airlines.

What's the cheapest day of the week to fly from Seattle to Trondheim?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Seattle to Trondheim. It’s 13% cheaper than the average day, while Thursday is the most expensive, with prices 116% higher.

Find deals

Key details for Seattle to Trondheim flights

Low season

January

Cheapest flight

$539
Beat the crowds with an average 48% drop in travelers.
The most popular month to fly with an average 4% increase in travelers.
Round-trip flight from Seattle to Trondheim

When to book flights from Seattle to Trondheim

Are your dates flexible? Find out the best times to travel from Seattle to Trondheim based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to Trondheim flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Seattle to Trondheim?

    Only Economy Class is available on flights from Seattle to Trondheim.

  • How long is a flight from Seattle to Trondheim?

    There are currently no nonstop flights available from Seattle to Trondheim. Flights with 1 layover take between 12h 36m and 15h 51m in total, depending on the connection.

  • Do I need a passport to fly from Seattle to Trondheim?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Seattle to Trondheim flight?

    Round-trip flights from Seattle to Trondheim range from $587 to $879, with an average of $765 over the past 12 months. Anything below $587 counts as a good deal.

  • Have flight prices from Seattle to Trondheim changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $539 to $2,359. That means the highest observed fare was about 4x higher than the lowest one.

  • What car rental options are available at Trondheim Vaernes Airport (TRD)?

    Trondheim Vaernes Airport (TRD) hosts 5 major car rental companies, with daily rates starting from around $29 for economy cars. Top options include:

    • Alamo
    • Sixt
    • Hertz
    • Avis
    • Budget

  • Which airports can I use when flying from Seattle to Trondheim?

    Flights from Seattle to Trondheim usually depart from Seattle/Tacoma Intl (SEA) and arrive at Trondheim Vaernes (TRD).

  • Which airports do connecting flights from Seattle to Trondheim pass through?

    Connecting flights from Seattle to Trondheim most commonly pass through:

    • Amsterdam Schiphol (AMS) - 89% of one-stop connections
    • Kastrup Copenhagen (CPH) - 11% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Trondheim?

    Yes. Flexible dates can save you up to 60% on flights from Seattle to Trondheim. Monday is the cheapest departure day at $666 round-trip on average, while Thursday is the most expensive at $1,658, a difference of $992.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Seattle to Trondheim?

    Flying via Kastrup Copenhagen (CPH) gives the shortest average 1-stop total travel time at 12h 36m, compared with 15h 51m via Amsterdam Schiphol (AMS).

  • What is the time difference between Seattle and Trondheim?

    Trondheim is 9 hours ahead of Seattle (Central European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking Seattle to Trondheim flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Thursday. On this route, Monday flights average $666, about $992 less than Thursday fares (60% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Seattle to Trondheim trip for May. Fares historically average $666 round-trip in that month - typically $739 less than the most expensive month, which is June (based on the last 12 months).

More options for your flight from Seattle to Trondheim

Complete your trip to Trondheim with a hotel stay or car rental

Car rentals in Trondheim
Hotels in Trondheim