$393 Cheap Flights from Kalispell (FCA) to St. Thomas (STT)

View $393 flight on Sat, Oct 25, 2025Opens in a new window

Popular airlines from Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT)

Cheap Flights from Kalispell to St. Thomas (FCA-STT)

Prices were available within the past 7 days and start at $393 for one-way flights and $713 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Jan 21 - Mon, Feb 2
FCA
Kalispell
STT
St. Thomas
$713 Roundtrip, found 1 hour ago
$713
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Jan 21 from Kalispell to St. Thomas, returning Mon, Feb 2, priced at $713 found 1 hour ago
United
Sat, Jan 24 - Mon, Feb 2
FCA
Kalispell
STT
St. Thomas
$759 Roundtrip, found 1 hour ago
$759
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Jan 24 from Kalispell to St. Thomas, returning Mon, Feb 2, priced at $759 found 1 hour ago
United
Wed, Jan 21 - Fri, Jan 30
FCA
Kalispell
STT
St. Thomas
$763 Roundtrip, found 1 hour ago
$763
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Jan 21 from Kalispell to St. Thomas, returning Fri, Jan 30, priced at $763 found 1 hour ago
United
Thu, Jan 22 - Mon, Feb 2
FCA
Kalispell
STT
St. Thomas
$790 Roundtrip, found 1 hour ago
$790
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jan 22 from Kalispell to St. Thomas, returning Mon, Feb 2, priced at $790 found 1 hour ago
United
Fri, Nov 14 - Thu, Dec 4
FCA
Kalispell
STT
St. Thomas
$793 Roundtrip, found 5 days ago
$793
Roundtrip
found 5 days ago
Select United flight, departing Fri, Nov 14 from Kalispell to St. Thomas, returning Thu, Dec 4, priced at $793 found 5 days ago
United
Mon, Jan 26 - Mon, Feb 2
FCA
Kalispell
STT
St. Thomas
$803 Roundtrip, found 1 hour ago
$803
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Jan 26 from Kalispell to St. Thomas, returning Mon, Feb 2, priced at $803 found 1 hour ago
United
Fri, Nov 14 - Fri, Dec 5
FCA
Kalispell
STT
St. Thomas
$806 Roundtrip, found 5 days ago
$806
Roundtrip
found 5 days ago
Select United flight, departing Fri, Nov 14 from Kalispell to St. Thomas, returning Fri, Dec 5, priced at $806 found 5 days ago
Alaska Airlines
Sat, Oct 25 - Sat, Nov 1
FCA
Kalispell
STT
St. Thomas
$868 Roundtrip, found 1 day ago
$868
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 25 from Kalispell to St. Thomas, returning Sat, Nov 1, priced at $868 found 1 day ago
American Airlines
Sat, Oct 25 - Sat, Nov 1
FCA
Kalispell
STT
St. Thomas
$892 Roundtrip, found 1 day ago
$892
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Oct 25 from Kalispell to St. Thomas, returning Sat, Nov 1, priced at $892 found 1 day ago
Delta
Tue, Dec 23 - Mon, Dec 29
FCA
Kalispell
STT
St. Thomas
$1,234 Roundtrip, found 6 days ago
$1,234
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Dec 23 from Kalispell to St. Thomas, returning Mon, Dec 29, priced at $1,234 found 6 days ago
Flights from Kalispell (FCA) to St. Thomas (STT)
Origin airport
Glacier Park Intl.
Destination airport
Cyril E. King
Airlines serving
United
Roundtrip price
$712
Distance
3433 mi

Kalispell to St. Thomas Flights

The cheapest times to fly from Kalispell to St. Thomas

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

 

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

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

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. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $393 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. Thomas 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. Thomas 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 Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT) cost?
Snag a cheap one-way flight from $393 or cheap return flight from $713 from Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT) 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 Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT)?
Flying in January can help you save, as it's the cheapest month for flights between FCA and STT. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT)?
To find the cheapest airline flying from FCA to STT, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT)?
You'll need to catch a flight with a layover when traveling from Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from FCA to STT?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT)?
To avoid possible delays on the Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT) route, aim to fly before 3 PM. Later departures have a 22% higher chance of being canceled.**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 Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT) last-minute?
Last-minute fares from FCA to STT are usually more expensive. To secure the cheapest rates, start looking for flights ahead of time. That being said, if you can play around with your travel dates, you may score a cheap ticket right before your trip.
Is it cheaper to book a FCA to STT flight and hotel package?
Opting for a FCA to STT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our extensive range of stays and then add car rentals, activities 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 Glacier Park Intl. Airport (FCA) to Cyril E. King Airport (STT)?
If you reserved your FCA to STT flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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*Available to One Key members.