$109 Cheap Flights from St. Louis (STL) to Kalispell (FCA)

View $109 flight on Mon, Nov 3, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Glacier Park Intl. Airport (FCA)

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Cheap Flights from St. Louis to Kalispell (STL-FCA)

Prices were available within the past 7 days and start at $109 for one-way flights and $227 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Sep 8 - Tue, Sep 9
STL
St. Louis
FCA
Kalispell
$227 Roundtrip, found 2 days ago
$227
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 8 from St. Louis to Kalispell, returning Tue, Sep 9, priced at $227 found 2 days ago
American Airlines
Mon, Sep 22 - Mon, Sep 29
STL
St. Louis
FCA
Kalispell
$227 Roundtrip, found 6 hours ago
$227
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Mon, Sep 22 from St. Louis to Kalispell, returning Mon, Sep 29, priced at $227 found 6 hours ago
Alaska Airlines
Mon, Sep 8 - Thu, Sep 11
STL
St. Louis
FCA
Kalispell
$230 Roundtrip, found 3 days ago
$230
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Mon, Sep 8 from St. Louis to Kalispell, returning Thu, Sep 11, priced at $230 found 3 days ago
United
Wed, Sep 10 - Wed, Sep 24
STL
St. Louis
FCA
Kalispell
$230 Roundtrip, found 5 hours ago
$230
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Sep 10 from St. Louis to Kalispell, returning Wed, Sep 24, priced at $230 found 5 hours ago
Delta
Tue, Sep 2 - Tue, Sep 9
STL
St. Louis
FCA
Kalispell
$244 Roundtrip, found 2 days ago
$244
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Sep 2 from St. Louis to Kalispell, returning Tue, Sep 9, priced at $244 found 2 days ago
Delta
Wed, Sep 10 - Wed, Sep 24
STL
St. Louis
FCA
Kalispell
$245 Roundtrip, found 5 hours ago
$245
Roundtrip
found 5 hours ago
Select Delta flight, departing Wed, Sep 10 from St. Louis to Kalispell, returning Wed, Sep 24, priced at $245 found 5 hours ago
United
Mon, Sep 8 - Thu, Sep 11
STL
St. Louis
FCA
Kalispell
$248 Roundtrip, found 3 days ago
$248
Roundtrip
found 3 days ago
Select United flight, departing Mon, Sep 8 from St. Louis to Kalispell, returning Thu, Sep 11, priced at $248 found 3 days ago
Delta
Wed, Sep 10 - Wed, Sep 24
STL
St. Louis
FCA
Kalispell
$257 Roundtrip, found 5 hours ago
$257
Roundtrip
found 5 hours ago
Select Delta flight, departing Wed, Sep 10 from St. Louis to Kalispell, returning Wed, Sep 24, priced at $257 found 5 hours ago
United
Mon, Sep 22 - Mon, Sep 29
STL
St. Louis
FCA
Kalispell
$260 Roundtrip, found 6 hours ago
$260
Roundtrip
found 6 hours ago
Select United flight, departing Mon, Sep 22 from St. Louis to Kalispell, returning Mon, Sep 29, priced at $260 found 6 hours ago
Hawaiian Airlines
Sat, Oct 25 - Mon, Nov 10
STL
St. Louis
FCA
Kalispell
$265 Roundtrip, found 14 hours ago
$265
Roundtrip
found 14 hours ago
Select Hawaiian Airlines flight, departing Sat, Oct 25 from St. Louis to Kalispell, returning Mon, Nov 10, priced at $265 found 14 hours ago

Find the cheapest month to fly from St. Louis (STL) to Kalispell (FCA)

September is typically the cheapest month to fly

From $226 - $718 per traveler.

Graph displaying average flight prices per month

Alternative airports near Kalispell

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

Select flight to Glacier Park Intl. FCA. Cheapest and Closest option available. Average driving time to city center is 13 minutes. Flights from $319
FCA
Glacier Park Intl.
CheapestClosest
Average driving time to city center13 min
Flights from $319
Flights from St. Louis (STL) to Kalispell (FCA)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Glacier Park Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$226
Distance
1358 mi

St. Louis to Kalispell Flights

The cheapest times to fly from St. Louis to Kalispell

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

 

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

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

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 Kalispell in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 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 Kalispell 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 Kalispell 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 Glacier Park Intl. Airport (FCA) cost?
Grab a cheap one-way flight from $109 or cheap return flight from $227 from Lambert-St. Louis Intl. Airport (STL) to Glacier Park Intl. Airport (FCA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Glacier Park Intl. Airport (FCA)?
Flying in September is a great way to save, as it's the cheapest month for flights between STL and FCA. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Glacier Park Intl. Airport (FCA)?
To find the cheapest airline that'll fly you from STL to FCA, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. 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 Glacier Park Intl. Airport (FCA)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Glacier Park Intl. Airport (FCA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to FCA?
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 Glacier Park Intl. Airport (FCA)?
To reach Glacier Park Intl. Airport (FCA) on schedule, book a flight that leaves 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 Glacier Park Intl. Airport (FCA) last-minute?
Last-minute fares from STL to FCA are generally more expensive. For the lowest rates, start looking for flights well in advance. That being said, if you can play around with your travel dates, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book a STL to FCA flight and hotel package?
Securing a STL to FCA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our extensive range of hotels and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Glacier Park Intl. Airport (FCA)?
If you reserved your STL to FCA flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.