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$150+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — STL
nov. 27 — dic. 41
jue. 11/27
jue. 12/4
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 octubre 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$247
(United Airlines)

One-way from

$150
(Delta)

Popular in

September

Cheapest in

December

Average price

$486
Provider with most accurate pricing for Kalispell Glacier Park-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Kalispell Glacier Park-Lambert-St Louis flights.
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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. 5% potential increase in price ($26 potential increase over avg. RT price).
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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 October 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 octubre 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/26. 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.
dom. 11/232:38 pmFCA - STL
1 stop6h 16mUnited Airlines
mié. 11/264:43 pmSTL - FCA
1 stop6h 01mUnited Airlines
Deal found 10/26$247
This Delta deal was found by Cheapflights users on 10/26. 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.
lun. 11/105:00 amFCA - STL
1 stop7h 31mDelta
vie. 11/146:34 amSTL - FCA
1 stop5h 52mDelta
Deal found 10/26$339
This Delta deal was found by Cheapflights users on 10/25. 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.
dom. 11/236:06 pmFCA - STL
2 stops13h 22mDelta
mié. 11/266:00 amSTL - FCA
2 stops12h 26mDelta
Deal found 10/25$689

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 octubre 28, 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

dom. 11/23

2:38 pm-9:54 pm

1 stop6h 16m

Lambert-St Louis

mié. 11/26

4:43 pm-9:44 pm

1 stop6h 01m

$247

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

mié. 4/15

3:00 pm-11:01 pm

1 stop7h 01m

Lambert-St Louis

sáb. 4/18

6:30 am-1:45 pm

1 stop8h 15m

$257

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

lun. 11/10

5:00 am-1:31 pm

1 stop7h 31m

Lambert-St Louis

vie. 11/14

6:34 am-11:26 am

1 stop5h 52m

$339

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

dom. 11/16

2:51 pm-11:23 pm

1 stop7h 32m

$150

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

dom. 11/16

5:44 pm-9:07 am

3 stops38h 23m

$167

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

jue. 3/19

3:00 pm-11:10 pm

1 stop7h 10m

$360

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

jue. 3/19

12:44 pm-8:48 am

2 stops19h 04m

$519

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

jue. 3/19

10:58 am-7:13 am

3 stops43h 15m

$764

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Compare providers for flights from Kalispell to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Kalispell to St. Louis in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Kalispell-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Kalispell-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Kalispell-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Kalispell-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Kalispell-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, March is the cheapest month in which you can book a flight from Kalispell to St. Louis (average of $180). Flying from Kalispell to St. Louis in September is currently the most expensive (average of $395). 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.

How much does it cost to fly round-trip from Kalispell to St. Louis?

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 octubre 28, 2025.
Peruse reviews from past customers who have flown with Delta and United 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
7.9
Good
7,994 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,994 reviews
Delta
7.9
Good
7,994 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
9,001 reviews
Delta
7.9
Good
7,994 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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.

  • How long is the flight from Kalispell to St. Louis?

    Airlines like United Airlines and Delta fly from Kalispell to St. Louis in about 6h 16m. The time it takes to get you to your destination can typically vary by up to 45m. The distance between Kalispell and St. Louis is about 1358 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Delta, at $205, was found to be the cheapest airline from Kalispell to St. Louis. An alternate airline flying to your destination would be United Airlines. Delta is 55% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, March is the cheapest month in which you can book a flight from Kalispell to St. Louis (average of $180). Flying from Kalispell to St. Louis in September is currently the most expensive (average of $395). 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 St. Louis?

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

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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 octubre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$357FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$311Average$511FlexibilityNo cancel feeOn-time69%

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