$153 Cheap American Airlines flights St. Louis (STL) to Kalispell (FCA)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap American Airlines round-trip flights from $305 from STL to FCA. Affordable one-way options from $153 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

American Airlines flights to Kalispell are typically cheaper in the quieter months of January and December. Whether you’re in search of a round-trip or one-way ticket, you could find a better deal then.

Look for affordable American Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Glacier Park Intl. Airport (FCA) one to three months before your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the best day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct route from STL to FCA with American Airlines or other carriers, check the “Nonstop” box when looking for tickets.

Filter your results by “Early Morning” and “Morning” to find the earliest flights from STL to FCA. Jetting off early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Get on an American Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Kalispell, and you’re most likely to land at Glacier Park Intl. Airport (FCA). This is the airline’s main hub here.

Depending on your fare type, a fee generally applies if you cancel or reschedule your flight more than 24 hours after it’s been confirmed. To find flexible fares, select our “Changes included” and “No cancel fee” boxes when you look for flights. To learn more about canceling or modifying your reservation, go to “Trips,” select your flight and tick “Manage Booking.”