$1,005 Cheap Flights from Trondheim (TRD) to St. Louis (STL)

View $1,005 flight on Wed, Jul 30, 2025Opens in a new window

Popular airlines from Vaernes Airport (TRD) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Trondheim to St. Louis (TRD-STL)

Prices were available within the past 7 days and start at $1,005 for one-way flights and $710 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Jul 24 - Thu, Aug 14
TRD
Trondheim
STL
St. Louis
$710 Roundtrip, found 1 day ago
$710
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jul 24 from Trondheim to St. Louis, returning Thu, Aug 14, priced at $710 found 1 day ago
Delta
Thu, Jul 24 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$738 Roundtrip, found 1 day ago
$738
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jul 24 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $738 found 1 day ago
Delta
Thu, Jul 24 - Sat, Aug 16
TRD
Trondheim
STL
St. Louis
$756 Roundtrip, found 1 day ago
$756
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jul 24 from Trondheim to St. Louis, returning Sat, Aug 16, priced at $756 found 1 day ago
KLM
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$767 Roundtrip, found 1 day ago
$767
Roundtrip
found 1 day ago
Select KLM flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $767 found 1 day ago
Delta
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$772 Roundtrip, found 1 day ago
$772
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $772 found 1 day ago
KLM
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$773 Roundtrip, found 1 day ago
$773
Roundtrip
found 1 day ago
Select KLM flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $773 found 1 day ago
Delta
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$780 Roundtrip, found 1 day ago
$780
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $780 found 1 day ago
KLM
Sat, Jul 26 - Sat, Aug 16
TRD
Trondheim
STL
St. Louis
$784 Roundtrip, found 1 day ago
$784
Roundtrip
found 1 day ago
Select KLM flight, departing Sat, Jul 26 from Trondheim to St. Louis, returning Sat, Aug 16, priced at $784 found 1 day ago
KLM
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$795 Roundtrip, found 1 day ago
$795
Roundtrip
found 1 day ago
Select KLM flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $795 found 1 day ago
Delta
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$801 Roundtrip, found 1 day ago
$801
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $801 found 1 day ago
KLM
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$801 Roundtrip, found 1 day ago
$801
Roundtrip
found 1 day ago
Select KLM flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $801 found 1 day ago
Delta
Wed, Jul 23 - Wed, Aug 13
TRD
Trondheim
STL
St. Louis
$808 Roundtrip, found 1 day ago
$808
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jul 23 from Trondheim to St. Louis, returning Wed, Aug 13, priced at $808 found 1 day ago
Flights from Trondheim (TRD) to St. Louis (STL)
Origin airport
Vaernes
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Delta, KLM
Roundtrip price
$710
Distance
4183 mi

Trondheim to St. Louis Flights

The cheapest times to fly from Trondheim to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Trondheim to St. Louis are during the month of July. You can find some of the cheapest flights from Trondheim to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Trondheim to St. Louis

Sunday is one of the best days to book for cheap flights from Trondheim to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Trondheim to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Trondheim to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,005 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Trondheim to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Trondheim to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from TRD to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from TRD to STL?
The cheapest flights from TRD to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from TRD to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from TRD to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily nonstop flights available from Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from TRD to STL?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can vary based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL) route, fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your departure to book a ticket from TRD to STL generally means paying more. Although you may find some last-minute deals, they're not always guaranteed. Keep your travel plans flexible for a better chance of snagging a bargain.
Is it cheaper to book a TRD to STL flight and hotel package?
Opting for a TRD to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our wide range of stays and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Vaernes Airport (TRD) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can cancel or modify your TRD to STL flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you want more information, visit our Customer Service portal.

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*Available to One Key members.