SEA - TRD

$653 Find Cheap Flights from Seattle to Trondheim

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Trondheim departing on 6/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Trondheim

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Trondheim, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Trondheim, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$676
Scandinavian Airlines
Sun 6/28Fri 7/24
SEA - TRD • 2 stops
Cheapest one-way
$653
Lufthansa
Wed 6/17
SEA - TRD • 2 stops
Top airlines
Cheapest • from $676 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Trondheim. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $784 (round-trip)
Shortest trip • 12h 59m (one-way)
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Trondheim!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Trondheim (SEA-TRD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Trondheim that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Trondheim

Sun, Jun 28 - Fri, Jul 24
Scandinavian Airlines Logo
3:55 pm - 8:20 pm
SEA
-
TRD
19h 25m
2 stops
Scandinavian Airlines Logo
8:30 pm - 1:45 pm
TRD
-
SEA
26h 15m
2 stops
$676Scandinavian Airlines
Sun, Jun 28 - Fri, Jul 24
Scandinavian Airlines Logo
3:55 pm - 12:35 am
SEA
-
TRD
23h 40m
1 stop
Scandinavian Airlines Logo
8:30 pm - 1:45 pm
TRD
-
SEA
26h 15m
2 stops
$677Scandinavian Airlines
Sun, Jun 28 - Fri, Jul 24
Scandinavian Airlines Logo
3:55 pm - 12:35 am
SEA
-
TRD
23h 40m
1 stop
Scandinavian Airlines Logo
7:45 pm - 1:45 pm
TRD
-
SEA
27h 00m
1 stop
$680Scandinavian Airlines
Sun, Jun 28 - Fri, Jul 24
Scandinavian Airlines Logo
3:55 pm - 8:20 pm
SEA
-
TRD
19h 25m
3 stops
Scandinavian Airlines Logo
6:00 am - 1:45 pm
TRD
-
SEA
16h 45m
2 stops
$770Scandinavian Airlines
Fri, Oct 9 - Tue, Oct 13
Scandinavian Airlines Logo
3:55 pm - 7:25 pm
SEA
-
TRD
18h 30m
2 stops
Scandinavian Airlines Logo
7:45 pm - 10:04 pm
TRD
-
SEA
35h 19m
2 stops
$796Scandinavian Airlines
Fri, Oct 9 - Tue, Oct 13
Scandinavian Airlines Logo
3:55 pm - 9:40 am
SEA
-
TRD
32h 45m
1 stop
Scandinavian Airlines Logo
5:40 am - 10:26 pm
TRD
-
SEA
25h 46m
2 stops
$860Scandinavian Airlines
Wed, Jun 17 - Wed, Jul 8
Multiple Airlines Logo
8:20 pm - 5:35 pm
SEA
-
TRD
36h 15m
2 stops
Multiple Airlines Logo
6:05 pm - 6:25 pm
TRD
-
SEA
33h 20m
2 stops
$1,166Multiple Airlines
Wed, Jun 17 - Wed, Jul 8
Lufthansa Logo
3:00 pm - 5:10 pm
SEA
-
TRD
17h 10m
2 stops
Lufthansa Logo
6:50 pm - 12:20 pm
TRD
-
SEA
26h 30m
1 stop
$1,202Lufthansa
Sun, Jun 28 - Fri, Jul 24
Multiple Airlines Logo
7:00 pm - 8:55 am
SEA
-
TRD
28h 55m
3 stops
Multiple Airlines Logo
5:40 am - 9:40 am
TRD
-
SEA
37h 00m
3 stops
$1,255Multiple Airlines
Wed, Jun 17 - Wed, Jul 8
Multiple Airlines Logo
3:00 pm - 10:40 pm
SEA
-
TRD
22h 40m
3 stops
Multiple Airlines Logo
6:05 pm - 5:10 pm
TRD
-
SEA
56h 05m
2 stops
$1,397Multiple Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Trondheim flights

Get data-powered insights and trends into flights from Seattle to Trondheim to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Trondheim?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seattle to Trondheim were found on Scandinavian Airlines ($676) and Lufthansa ($1,202).

Good to know

Cheapest flight$653
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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Trondheim

  • What is the cheapest flight from Seattle to Trondheim?

    In the last 3 days, the lowest price for a flight from Seattle to Trondheim was $653 for a one-way ticket and $676 for a round-trip.

  • Do I need a passport to fly between Seattle and Trondheim?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seattle and on arrival in Trondheim.

  • Which airports will I be using when flying from Seattle to Trondheim?

    On your way to Trondheim, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Trondheim Vaernes.

  • Which aircraft models fly most regularly from Seattle to Trondheim?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Trondheim?

    SkyTeam is the only airline alliance operating flights between Seattle and Trondheim.

  • How does KAYAK find such low prices on flights from Seattle to Trondheim?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Trondheim.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Trondheim?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Trondheim from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Trondheim?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Trondheim with an airline and back to Seattle with another airline. Booking your flights between Seattle and TRD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Trondheim?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Trondheim from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Trondheim

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Trondheim. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Trondheim? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1509 reviews
8.4Crew
7.1Entertainment
7.3Food
7.7Comfort
7.8Boarding
Airline reviews

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

2.0 MediocreRakesh, Mar 2026
AMS - BOM
Read more KLM reviews

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Everything you need to know for your flight from Seattle to Trondheim

Information on your arrival and departure airports