$436 Cheap Flights from St. Louis (STL) to Tromsø (TOS)

View $436 flight on Fri, Jan 23, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Tromsø (TOS-Langnes)

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Cheap Flights from St. Louis to Tromsø (STL-TOS)

Prices were available within the past 7 days and start at $436 for one-way flights and $543 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Jan 12 - Tue, Jan 27
STL
St. Louis
TOS
Tromsø
$543 Roundtrip, found 2 days ago
$543
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Jan 12 from St. Louis to Tromsø, returning Tue, Jan 27, priced at $543 found 2 days ago
Delta
Mon, Feb 9 - Thu, Feb 26
STL
St. Louis
TOS
Tromsø
$550 Roundtrip, found 2 days ago
$550
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Feb 9 from St. Louis to Tromsø, returning Thu, Feb 26, priced at $550 found 2 days ago
Delta
Mon, Jan 19 - Tue, Feb 3
STL
St. Louis
TOS
Tromsø
$569 Roundtrip, found 2 days ago
$569
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Jan 19 from St. Louis to Tromsø, returning Tue, Feb 3, priced at $569 found 2 days ago
KLM
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
TOS
Tromsø
$574 Roundtrip, found 2 days ago
$574
Roundtrip
found 2 days ago
Select KLM flight, departing Tue, Jan 20 from St. Louis to Tromsø, returning Tue, Feb 3, priced at $574 found 2 days ago
KLM
Fri, Jan 23 - Sun, Feb 8
STL
St. Louis
TOS
Tromsø
$576 Roundtrip, found 2 days ago
$576
Roundtrip
found 2 days ago
Select KLM flight, departing Fri, Jan 23 from St. Louis to Tromsø, returning Sun, Feb 8, priced at $576 found 2 days ago
KLM
Tue, Dec 9 - Thu, Dec 25
STL
St. Louis
TOS
Tromsø
$581 Roundtrip, found 1 day ago
$581
Roundtrip
found 1 day ago
Select KLM flight, departing Tue, Dec 9 from St. Louis to Tromsø, returning Thu, Dec 25, priced at $581 found 1 day ago
KLM
Tue, Dec 9 - Tue, Dec 23
STL
St. Louis
TOS
Tromsø
$599 Roundtrip, found 1 day ago
$599
Roundtrip
found 1 day ago
Select KLM flight, departing Tue, Dec 9 from St. Louis to Tromsø, returning Tue, Dec 23, priced at $599 found 1 day ago
Scandinavian Airlines
Thu, Jan 15 - Thu, Jan 29
STL
St. Louis
TOS
Tromsø
$638 Roundtrip, found 1 day ago
$638
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Thu, Jan 15 from St. Louis to Tromsø, returning Thu, Jan 29, priced at $638 found 1 day ago
Lufthansa
Fri, Jan 16 - Thu, Jan 29
STL
St. Louis
TOS
Tromsø
$662 Roundtrip, found 1 day ago
$662
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Fri, Jan 16 from St. Louis to Tromsø, returning Thu, Jan 29, priced at $662 found 1 day ago
Finnair
Wed, Feb 18 - Tue, Mar 3
STL
St. Louis
TOS
Tromsø
$881 Roundtrip, found 2 days ago
$881
Roundtrip
found 2 days ago
Select Finnair flight, departing Wed, Feb 18 from St. Louis to Tromsø, returning Tue, Mar 3, priced at $881 found 2 days ago

Alternative airports near Tromsø

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Langnes TOS. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $1,137
TOS
Langnes
CheapestClosest
Average driving time to city center6 min
Flights from $1,137

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS) cost?
Snag a cheap one-way flight from $436 or cheap return flight from $543 from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS)?
The cheapest month to fly from STL to TOS is January, when demand is low. Off-peak months are generally when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS)?
To find the cheapest airline flying from STL to TOS, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to TOS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS)?
To arrive at Langnes Airport (TOS) on schedule, book a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS) last-minute?
Booking your ticket from STL to TOS right before your getaway is generally more expensive. But if there's some wiggle room with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a STL to TOS flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to TOS flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one place will take the hassle out of travel planning. Simply pick your flights and select from our extensive range of stays, then customize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS)?
In most instances, you can modify or cancel your STL to TOS flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want further information, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Langnes
Airlines serving
Finnair, Lufthansa
Roundtrip price
$542
Distance
4156 mi

Book with confidence

St. Louis to Tromsø Flights

The cheapest times to fly from St. Louis to Tromsø

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 St. Louis to Tromsø are during the month of January. You can find some of the cheapest flights from St. Louis to Tromsø with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Tromsø: 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 St. Louis to Tromsø

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 St. Louis to Tromsø in 2025. You can also book with separate airlines for your outbound and return journeys, from $436 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 St. Louis to Tromsø 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 St. Louis to Tromsø 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.

 

St. Louis to Tromsø Flights

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