What is the cheapest day to fly from Kalispell to St. Louis?

Travelers seeking maximum savings on their Kalispell to St. Louis flight should consider departing on Friday at noon when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest day to fly round-trip from Kalispell to St. Louis?

Thursday is generally a great day to depart. Flying on this day could help you save up to 90%.

What is the cheapest month to fly from Kalispell to St. Louis?

March is one of the best times of the year to fly to St. Louis from Kalispell. Prices for March average $462 per person but you can even find prices for as low as $180. The most expensive prices can be found in the month of November. Opting for a March flight can save you 23% on your journey compared to booking in November

What is the cheapest time of day to fly from FCA to STL?

One of the essential ways to save on airfare from Kalispell to St. Louis is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 36% on airfare.

Can I find deals for flights from Kalispell to St. Louis that include hotel bookings?

Yes. In addition to deals on Kalispell to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Kalispell to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kalispell to St. Louis.

Can I find deals for business class flights from Kalispell to St. Louis?

Yes. Cheapflights offers flight deals from Kalispell to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$267+ Flights from Kalispell to St. Louis

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Cheap flight deals from Kalispell to St. Louis

Popular in	November
Cheapest in	March
Average price	$541

High demand for flights, 4% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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One-way flights from Kalispell to St. Louis
Search for one-way flight options from Kalispell to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Sun 8/314:57 pmFCA - STL

1 stop14h 23mAmerican Airlines

Deal found 7/27

$267

Sun 8/315:20 amFCA - STL

2 stops9h 46mDelta

Deal found 7/28

$352

Fly from

Fly to

Route

Depart

Return

Price

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sun 8/31

4:57 pm-8:20 am

1 stop14h 23m

$267

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sun 8/31

5:20 am-4:06 pm

2 stops9h 46m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Kalispell to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Kalispell with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Kalispell to St. Louis

What is the cheapest month to book a flight from Kalispell to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Kalispell to St. Louis (average of $311). Flying from Kalispell to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Delta and American Airlines from Kalispell to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,979 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Can I find deals for flights from Kalispell to St. Louis that include hotel bookings?
Yes. In addition to deals on Kalispell to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Kalispell to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kalispell to St. Louis.
Can I find deals for business class flights from Kalispell to St. Louis?
Yes. Cheapflights offers flight deals from Kalispell to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Kalispell to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Kalispell to St. Louis (average of $311). Flying from Kalispell to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 2 airlines flying from Kalispell to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$287	Average$367	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$311	Average$551	FlexibilityNo cancel fee	On-time69%

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$267+ Cheap flights from Kalispell to St. Louis (FCA - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/31. Fares are subject to change and may not be available on all flights or dates of travel.

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One-way flights from Kalispell to St. LouisSearch for one-way flight options from Kalispell to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Search for one-way flight options from Kalispell to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

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Use the filters below to find and compare flights from Kalispell to St. Louis that are best for you.

Best time to book a flight from Kalispell to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Kalispell with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Kalispell to St. Louis

What is the cheapest month to book a flight from Kalispell to St. Louis?

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Delta and American Airlines from Kalispell to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Kalispell to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Kalispell to St. Louis that include hotel bookings?

How can I find direct flights from Kalispell to St. Louis?

Can I find deals for business class flights from Kalispell to St. Louis?

What is the cheapest month to book a flight from Kalispell to St. Louis?

Traveling to a place near St. Louis?

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Alternative routes for Kalispell to St. Louis

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Top 2 airlines flying from Kalispell to St. Louis

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One-way flights from Kalispell to St. Louis
Search for one-way flight options from Kalispell to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.