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$188+ 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 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — STL
Jun 14 — Jun 211
Sat 6/14
Sat 6/21
1 adult, Economy
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Cheap flight deals from Kalispell to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Kalispell (FCA) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 9, 2025.

Round-trip from

$318
(Delta)

One-way from

$188
(Mytrip)

Popular in

June

Cheapest in

December

Average price

$700
From Kalispell Glacier Park to Lambert-St Louis
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One-way flight from Kalispell Glacier Park to Lambert-St Louis
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Highest demand for flights based on searches. 12% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Kalispell to St. Louis

Cheapest flights from Kalispell to St. Louis
Explore the most affordable flight options available from Kalispell to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 9, 2025.

This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:11 pmFCA - STL
1 stop5h 27mDelta
Mon 8/115:30 pmSTL - FCA
1 stop7h 21mDelta
Deal found 6/9$318
This Mytrip deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3110:40 amFCA - STL
2 stops22h 12mMultiple Airlines
Thu 8/710:47 amSTL - FCA
2 stops23h 32mMultiple Airlines
Deal found 6/8$386
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/246:20 amFCA - STL
1 stop5h 26mUnited Airlines
Sat 6/285:30 pmSTL - FCA
1 stop6h 18mUnited Airlines
Deal found 6/8$406
This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/78:00 pmFCA - STL
2 stops11h 20mAlaska Airlines
Mon 8/117:53 amSTL - FCA
2 stops12h 27mAlaska Airlines
Deal found 6/9$475

Cheapflights Fare Finder

Customize your flight search to find flights from Kalispell to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 9, 2025.
Use the filters below to find and compare flights from Kalispell to St. Louis that are best for you.

Fly from

Kalispell

Fly to

St. Louis

Route

Depart

Return

Price

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 8/7

6:11 pm-12:38 am

1 stop5h 27m

Lambert-St Louis

Mon 8/11

5:30 pm-11:51 pm

1 stop7h 21m

$318

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 7/31

10:40 am-9:52 am

2 stops22h 12m

Lambert-St Louis

Thu 8/7

10:47 am-9:19 am

2 stops23h 32m

$386

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 6/24

6:20 am-12:46 pm

1 stop5h 26m

Lambert-St Louis

Sat 6/28

5:30 pm-10:48 pm

1 stop6h 18m

$406

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 8/7

8:00 pm-8:20 am

2 stops11h 20m

Lambert-St Louis

Mon 8/11

7:53 am-7:20 pm

2 stops12h 27m

$475

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 6/19

10:40 am-10:33 am

2 stops22h 53m

$188

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sun 8/31

6:39 am-2:39 pm

1 stop7h 00m

$189

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 9/2

3:49 pm-11:14 pm

1 stop6h 25m

$236

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sun 8/31

5:20 am-5:54 pm

2 stops11h 34m

$275

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 6/20

6:33 am-10:59 pm

2 stops15h 26m

$366

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sun 7/20

6:20 am-9:50 pm

1 stop14h 30m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/8

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.

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

Find hourly flight availability from Kalispell to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 9, 2025.

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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

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.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated June 9, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,952 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,490 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,783 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Kalispell to St. Louis round-trip?

    Delta, at $318, was found to be the cheapest airline from Kalispell to St. Louis.Alternate airlines to your destination round-trip include United Airlines and Alaska Airlines. Delta is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Kalispell to St. Louis one-way?

    The cheapest airlines for a one-way flight from Kalispell to St. Louis are Hawaiian Airlines ($189), American Airlines ($236), and Delta ($275).

  • 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.

See more FAQs

Traveling to a place near Kalispell?

Book flights to Kalispell if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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Top 2 airlines flying from Kalispell to St. Louis

Discover the top 2 airlines that operate flights from Kalispell to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$298Average$378FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$337Average$568FlexibilityNo cancel feeOn-time69%

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