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$180 Cheap Flights from Kalispell (FCA) to St. Louis (STL)

View $180 flight on Tue, Aug 31, 2027Opens in a new window

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

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

Prices were available within the past 7 days and start at $180 for one-way flights and $359 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Nov 11 - Wed, Nov 18
FCA
Kalispell
STL
St. Louis
$359 Roundtrip, found 1 day ago
$359
Roundtrip
found 1 day ago
Select United flight, departing Wed, Nov 11 from Kalispell to St. Louis, returning Wed, Nov 18, priced at $359 found 1 day ago
Alaska Airlines
Mon, Sep 28 - Fri, Oct 2
FCA
Kalispell
STL
St. Louis
$359 Roundtrip, found 3 days ago
$359
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Mon, Sep 28 from Kalispell to St. Louis, returning Fri, Oct 2, priced at $359 found 3 days ago
Delta
Thu, Oct 1 - Sun, Oct 4
FCA
Kalispell
STL
St. Louis
$369 Roundtrip, found 1 day ago
$369
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Oct 1 from Kalispell to St. Louis, returning Sun, Oct 4, priced at $369 found 1 day ago
American Airlines
Thu, Oct 1 - Sun, Oct 4
FCA
Kalispell
STL
St. Louis
$379 Roundtrip, found 1 day ago
$379
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Oct 1 from Kalispell to St. Louis, returning Sun, Oct 4, priced at $379 found 1 day ago
Delta
Sat, Nov 14 - Thu, Nov 19
FCA
Kalispell
STL
St. Louis
$379 Roundtrip, found 13 hours ago
$379
Roundtrip
found 13 hours ago
Select Delta flight, departing Sat, Nov 14 from Kalispell to St. Louis, returning Thu, Nov 19, priced at $379 found 13 hours ago
United
Wed, Oct 14 - Sun, Oct 18
FCA
Kalispell
STL
St. Louis
$384 Roundtrip, found 1 day ago
$384
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 14 from Kalispell to St. Louis, returning Sun, Oct 18, priced at $384 found 1 day ago
United
Wed, Nov 11 - Wed, Nov 18
FCA
Kalispell
STL
St. Louis
$384 Roundtrip, found 18 hours ago
$384
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Nov 11 from Kalispell to St. Louis, returning Wed, Nov 18, priced at $384 found 18 hours ago
Delta
Fri, Oct 2 - Tue, Oct 6
FCA
Kalispell
STL
St. Louis
$389 Roundtrip, found 3 days ago
$389
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Oct 2 from Kalispell to St. Louis, returning Tue, Oct 6, priced at $389 found 3 days ago
United
Thu, Oct 1 - Sun, Oct 4
FCA
Kalispell
STL
St. Louis
$390 Roundtrip, found 1 day ago
$390
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 1 from Kalispell to St. Louis, returning Sun, Oct 4, priced at $390 found 1 day ago
United
Thu, Oct 1 - Sun, Oct 4
FCA
Kalispell
STL
St. Louis
$393 Roundtrip, found 1 day ago
$393
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 1 from Kalispell to St. Louis, returning Sun, Oct 4, priced at $393 found 1 day ago

What you need to know for your flight from Glacier Park Intl. to Lambert-St. Louis Intl.

Kalispell (FCA) to St. Louis (STL) at a glance

Travel between Kalispell (FCA) and St. Louis (STL) with a range of airlines operating on this domestic short-haul route. Evaluate options from full-service carriers to discover the itinerary that aligns perfectly with your budget, schedule, and travel needs while you enjoy the iconic attractions and neighborhoods of St. Louis. Get essential information for flights from Glacier Park International Airport (FCA) to Lambert-St. Louis International Airport (STL).

  • Fastest flight duration: around 4h 30m in-flight, plus roughly 1h 15m layover with one stop
  • Route distance: roughly 1,400 miles (2,250 km)
  • Flights per week: around 9 departures on average
  • Typical fares (one-way): economy tickets often range from $130–$455, depending on seasonality and how far ahead you book

Flights from Glacier Park International Airport (FCA) to Lambert-St. Louis International Airport (STL)

Based on the latest traveler bookings, here are the top airlines flying from Kalispell to St. Louis, typically favored for their one-stop services. Popular layovers include Denver International Airport (DEN) with a layover of about 1 hour, O'Hare International Airport (ORD) at approximately 1 hour and 15 minutes, and Salt Lake City International Airport (SLC), also with a layover of about 1 hour and 15 minutes. These options allow you to balance price, total travel time, and cabin class to find the ideal itinerary.

  • United: As a comprehensive airline, United provides one-stop services with one-way ticket prices generally falling between $140 and $500. It represents about 40% of the flights on this route, featuring an in-flight duration of 4 hours and 30 minutes, with an overall travel time of close to 6 hours, including layovers.
  • Delta: Delta serves as a full-service airline that offers one-stop flights, with typical one-way fares ranging from $130 to $410. It makes up approximately 31% of the departures for this route, with a flight time of 4 hours and 30 minutes and a total travel duration of around 6 hours when factoring in layovers.
  • American Airlines: This full-service carrier provides one-stop options, with one-way fares usually between $130 and $450. American Airlines accounts for about 21% of the departures on this route, with an in-flight time of 4 hours and 30 minutes, leading to an estimated total journey time of about 6 hours, including layovers.
  • Alaska Airlines: Known for its full-service offerings, Alaska Airlines features one-stop flights with one-way fares that typically range from $135 to $355. It comprises around 7% of the departures on this route, providing a flight duration of 4 hours and 30 minutes and a total travel time of roughly 6 hours, including layovers.

Travelers flying from Kalispell to St. Louis have the option to upgrade their experience, as United offers first-class service on this route.

Best time to fly from Kalispell (FCA) to St. Louis (STL)

The most popular months for travelers flying from Kalispell to St. Louis are July, August, and September, when peak temperatures in St. Louis reach up to 78.6°F in July. If you prefer quieter travel, consider November, the least busy time to visit with temperatures around 46.2°F and typically the lowest average one-way fare (around $174). Flight availability peaks in July and August, with approximately 11 flights per week, making it easier to find convenient departure times. February, March, April, October, and December have the fewest flights, with approximately 7 flights per week.

  • Cheapest time to fly: November usually offers good deals with average one-way fare around $174, roughly 29% cheaper than the yearly average.
  • Most flight options: July and August have the highest number of flights from Kalispell to St. Louis, with approximately 11 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January31.6°F (-0.2°C)Average10$204
February34.9°F (1.6°C)Average7$264
March46.4°F (8.0°C)Average7$300
April56.1°F (13.4°C)Low7$219
May66.6°F (19.2°C)Average9$203
June76.1°F (24.5°C)Average9$223
July78.6°F (25.9°C)High11$310
August77.0°F (25.0°C)High11$304
September70.9°F (21.6°C)High9$255
October58.6°F (14.8°C)Average7$231
November46.2°F (7.9°C)Low8$174
December37.8°F (3.2°C)Low7$285

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Kalispell (FCA) to St. Louis (STL)

  • Kalispell to St. Louis (FCA-SUS): Spirit of St. Louis Airport (SUS) is located approximately 16 miles from Lambert-St. Louis International Airport (STL).
  • Kalispell to St. Louis (FCA-CPS): St. Louis Downtown Airport (CPS) lies around 16 miles from Lambert-St. Louis International Airport (STL).
  • Kalispell to Springfield (FCA-SPI): Abraham Lincoln Capital Airport (SPI) is about 85 miles distant from Lambert-St. Louis International Airport (STL).

How to find the best prices for flights from Kalispell (FCA) to St. Louis (STL)

Getting some of the best deals on flights from Kalispell to St. Louis is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are generally found when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Departures between 12 PM and 6 PM often offer lower prices and are the most favored flight times. Additionally, flying on Thursdays typically provides cheaper options, while Saturdays remain the most popular travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Lambert-St. Louis International Airport from Glacier Park International Airport

St. Louis welcomes travelers from Kalispell with a range of transport options based on price, convenience, and proximity. Here's how to reach St. Louis efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Louis, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Lambert-St. Louis International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Lambert-St. Louis International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is located about 0.1 miles away on foot, providing easy access to public transport for travelers.

Frequently asked questions

How much does a flight from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $180 and cheap return flights from $359 Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights usually range from $155 to $1015, and return flights typically cost between $269 and $1356. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
January is the cheapest month to fly from Kalispell, MT (FCA) to St. Louis, MO (STL), with average return fares around $308. This price is about 26% lower than the average throughout the year, as travel tends to slow down after the holiday season. Other affordable months to consider are May and November.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter FCA to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
American Airlines is one of the cheapest airlines offering connecting flights from Kalispell, MT (FCA) to St. Louis, MO (STL), starting from around $226 for a round-trip ticket. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The ideal months to fly from Kalispell (FCA) to St. Louis (STL) are January and May. You can find return flights for about $308 in January, making it the cheapest month, while May is popular for its spring weather. This balance of price and pleasant conditions makes these months great for your trip.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Kalispell, MT (Glacier Park Intl.) to St. Louis, MO (Lambert-St. Louis Intl.) typically departs at around 5:00 AM, operated by Delta. This seasonal service is available in February, allowing you to kick off your travel day bright and early. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Kalispell (FCA) to St. Louis (STL) are in the early morning, from 6am to 9am. This accounts for around 35% of total traffic. Airlines like Alaska Airlines and United Airlines offer flights during this window. Many travelers prefer this timing as it allows them to arrive in St. Louis with a full day ahead.
How long does it take to fly from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A flight from FCA to STL with a layover takes around 5 hours 20 minutes, with the route covering approximately 1,359 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can fly first class between FCA and STL. First class cabins are available on:

  • Delta Air Lines
  • United Airlines
  • American Airlines

How do I earn miles on a Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from Glacier Park Intl. (FCA)?
If you're planning to travel to St. Louis from Glacier Park Intl. (FCA), you can fly into Lambert-St. Louis Intl. (STL) Some flights may connect through major hubs like Denver Intl. (DEN), Portland Intl. (PDX), Seattle - Tacoma Intl. (SEA) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Kalispell, MT (FCA-Glacier Park Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) 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 ticket you have, 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'd like more information.

Travel information

Origin airport
Glacier Park Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$358
Distance
1358 mi

Book with confidence

Kalispell to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Kalispell 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 Kalispell 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 Kalispell to St. Louis in 2026. You can also book with separate airlines for your outbound and return journeys, from $180 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 Kalispell 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 Kalispell 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.

 

Kalispell to St. Louis Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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