$458 Cheap Flights from St. Louis (STL) to Tromsø (TOS)

View $458 flight on Tue, Aug 19, 2025Opens 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 $458 for one-way flights and $730 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$730 Roundtrip, found 5 days ago
$730
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $730 found 5 days ago
American Airlines
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$742 Roundtrip, found 5 days ago
$742
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $742 found 5 days ago
American Airlines
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$782 Roundtrip, found 5 days ago
$782
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $782 found 5 days ago
British Airways
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$785 Roundtrip, found 5 days ago
$785
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $785 found 5 days ago
British Airways
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$792 Roundtrip, found 5 days ago
$792
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $792 found 5 days ago
American Airlines
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$794 Roundtrip, found 5 days ago
$794
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $794 found 5 days ago
British Airways
Wed, Feb 4 - Sun, Feb 15
STL
St. Louis
TOS
Tromsø
$797 Roundtrip, found 5 days ago
$797
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Feb 4 from St. Louis to Tromsø, returning Sun, Feb 15, priced at $797 found 5 days ago
Air Canada
Mon, Feb 2 - Fri, Feb 13
STL
St. Louis
TOS
Tromsø
$831 Roundtrip, found 5 days ago
$831
Roundtrip
found 5 days ago
Select Air Canada flight, departing Mon, Feb 2 from St. Louis to Tromsø, returning Fri, Feb 13, priced at $831 found 5 days ago
United
Mon, Feb 2 - Fri, Feb 13
STL
St. Louis
TOS
Tromsø
$833 Roundtrip, found 5 days ago
$833
Roundtrip
found 5 days ago
Select United flight, departing Mon, Feb 2 from St. Louis to Tromsø, returning Fri, Feb 13, priced at $833 found 5 days ago
Lufthansa
Fri, Nov 7 - Wed, Nov 19
STL
St. Louis
TOS
Tromsø
$901 Roundtrip, found 3 days ago
$901
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Fri, Nov 7 from St. Louis to Tromsø, returning Wed, Nov 19, priced at $901 found 3 days ago
Flights from St. Louis (STL) to Tromsø (TOS)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Langnes
Airlines serving
Finnair, Lufthansa
Roundtrip price
$729
Distance
4156 mi

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 February. 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 $458 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.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Langnes Airport (TOS) cost?
Discover the latest flight deals from STL to TOS 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 STL to TOS?
The cheapest flights from STL to TOS 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 STL to TOS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to TOS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.

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*Available to One Key members.