SEA - TRD

$456 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 7/25. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights 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, Aug 24 - Thu, Aug 28
Scandinavian Airlines Logo
4:00 pm - 9:25 pmSEA-TRD
20h 25m2 stops
Scandinavian Airlines Logo
6:25 pm - 1:50 pmTRD-SEA
28h 25m2 stops
$493Scandinavian Airlines
Find Deal
Sun, Aug 24 - Thu, Aug 28
KLM Logo
1:55 pm - 10:50 pmSEA-TRD
23h 55m1 stop
KLM Logo
6:00 am - 11:35 amTRD-SEA
14h 35m1 stop
$494KLM
Find Deal
Sun, Aug 24 - Thu, Aug 28
Delta Logo
7:10 am - 11:30 amSEA-TRD
19h 20m2 stops
Delta Logo
6:00 am - 3:55 pmTRD-SEA
18h 55m1 stop
$521Delta
Find Deal
Sun, Jul 20 - Wed, Jul 30
KLM Logo
5:35 pm - 4:30 pmSEA-TRD
13h 55m1 stop
KLM Logo
12:05 pm - 11:35 amTRD-SEA
32h 30m1 stop
$552KLM
Find Deal
Sun, Jul 20 - Wed, Jul 30
Scandinavian Airlines Logo
4:00 pm - 9:35 amSEA-TRD
32h 35m1 stop
Scandinavian Airlines Logo
8:55 pm - 1:50 pmTRD-SEA
49h 55m2 stops
$569Scandinavian Airlines
Find Deal
Sun, Jul 20 - Wed, Jul 30
Scandinavian Airlines Logo
4:00 pm - 2:40 pmSEA-TRD
37h 40m2 stops
Scandinavian Airlines Logo
6:50 pm - 1:50 pmTRD-SEA
52h 00m2 stops
$606Scandinavian Airlines
Find Deal
Sun, Jul 20 - Wed, Jul 30
Scandinavian Airlines Logo
4:00 pm - 9:35 amSEA-TRD
32h 35m1 stop
Scandinavian Airlines Logo
6:50 pm - 1:50 pmTRD-SEA
52h 00m2 stops
$646Scandinavian Airlines
Find Deal
Sun, Jul 20 - Wed, Jul 30
Scandinavian Airlines Logo
4:00 pm - 6:45 pmSEA-TRD
17h 45m3 stops
Scandinavian Airlines Logo
6:50 pm - 1:50 pmTRD-SEA
52h 00m2 stops
$759Scandinavian Airlines
Find Deal
Sun, Jul 20 - Wed, Jul 30
Scandinavian Airlines Logo
4:00 pm - 6:45 pmSEA-TRD
17h 45m3 stops
Scandinavian Airlines Logo
8:55 pm - 1:50 pmTRD-SEA
49h 55m2 stops
$762Scandinavian Airlines
Find Deal
Sun, Jul 20 - Wed, Jul 30
Scandinavian Airlines Logo
4:00 pm - 9:35 amSEA-TRD
32h 35m1 stop
Scandinavian Airlines Logo
5:45 am - 1:50 pmTRD-SEA
17h 05m1 stop
$829Scandinavian Airlines
Find Deal
Useful Info

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 ($493) and KLM ($494).

Find deals

Good to know

Cheapest flight$456
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 $456 for a one-way ticket and $493 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, and oneworld are the airline alliances operating flights between Seattle and Trondheim, with SkyTeam being the most commonly used for this route.

  • 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 1366 reviews
7.1Entertainment
7.2Food
7.8Boarding
8.4Crew
7.7Comfort
Airline reviews

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

2.0 Mediocrejoseph, Jun 2025JFK - AMS
Read more KLM reviews

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

Great boarding, great short flight but no entertainment whatsoever and no wifi. Prepare to disembark by a staircase.

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

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

Information on your arrival and departure airports

Seattle (SEA)
Trondheim (TRD)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.