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$129+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — STL
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap 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 January 27, 2026.

This Delta deal was found by Cheapflights users on 1/27. 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.
Mon 4/132:49 pm
FCA
-
STL
1 stop7h 25m
Delta
Sat 4/186:19 am
STL
-
FCA
1 stop8h 00m
Delta
Deal found 1/27$257
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 6/256:33 am
FCA
-
STL
1 stop16h 25m
Alaska Airlines
Sat 6/277:30 pm
STL
-
FCA
1 stop29h 29m
Alaska Airlines
Deal found 1/27$510
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/107:46 pm
FCA
-
STL
1 stop17h 08m
Alaska Airlines
Sat 2/142:47 pm
STL
-
FCA
2 stops23h 26m
Alaska Airlines
Deal found 1/26$531
This Alaska Airlines deal was found by Cheapflights users on 1/24. 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.
Mon 4/138:26 pm
FCA
-
STL
2 stops13h 53m
Alaska Airlines
Sat 4/182:29 pm
STL
-
FCA
2 stops22h 43m
Alaska Airlines
Deal found 1/24$575
This Alaska Airlines deal was found by Cheapflights users on 1/24. 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.
Fri 2/66:25 am
FCA
-
STL
1 stop6h 29m
Alaska Airlines
Sat 2/76:19 pm
STL
-
FCA
1 stop25h 47m
Alaska Airlines
Deal found 1/24$581
This Delta deal was found by Cheapflights users on 1/26. 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.
Tue 2/105:24 am
FCA
-
STL
2 stops10h 21m
Delta
Sat 2/143:40 pm
STL
-
FCA
2 stops9h 10m
Delta
Deal found 1/26$596

Find 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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Delta)

Popular in

January

Cheapest in

November

Average price

$1,086
Provider with most accurate pricing for Kalispell Glacier Park-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kalispell Glacier Park-Lambert-St Louis flights.
Search Deals
From Kalispell Glacier Park to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($151 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 27, 2026.
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

Mon 4/13

2:49 pm-11:14 pm

1 stop7h 25m

Lambert-St Louis

Sat 4/18

6:19 am-1:19 pm

1 stop8h 00m

$257

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 6/25

6:33 am-11:58 pm

1 stop16h 25m

Lambert-St Louis

Sat 6/27

7:30 pm-11:59 pm

1 stop29h 29m

$510

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 2/10

7:46 pm-1:54 pm

1 stop17h 08m

Lambert-St Louis

Sat 2/14

2:47 pm-1:13 pm

2 stops23h 26m

$531

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Mon 4/13

8:26 pm-11:19 am

2 stops13h 53m

Lambert-St Louis

Sat 4/18

2:29 pm-12:12 pm

2 stops22h 43m

$575

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 2/6

6:25 am-1:54 pm

1 stop6h 29m

Lambert-St Louis

Sat 2/7

6:19 pm-7:06 pm

1 stop25h 47m

$581

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 2/10

5:24 am-4:45 pm

2 stops10h 21m

Lambert-St Louis

Sat 2/14

3:40 pm-11:50 pm

2 stops9h 10m

$596

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 5/22

3:00 pm-11:01 pm

1 stop7h 01m

$129

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 5/15

5:40 pm-3:50 pm

1 stop21h 10m

$140

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 5/14

3:00 pm-11:01 pm

1 stop7h 01m

$140

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 5/22

1:20 pm-11:58 pm

2 stops9h 38m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 15 results
1
2

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Kalispell-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, December is the cheapest month in which you can book a flight from Kalispell to St. Louis (average of $221). Flying from Kalispell to St. Louis in March is currently the most expensive (average of $404). 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

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 January 27, 2026.
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
8,119 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,119 reviews
Delta
7.9
Good
8,119 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,205 reviews
Delta
7.9
Good
8,119 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 Delta and Alaska Airlines fly from Kalispell to St. Louis in about 7h 25m. The time it takes to get you to your destination can typically vary by up to 9h 43m. 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 60% 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 Delta ($143), American Airlines ($159), and United Airlines ($187).

  • 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, December is the cheapest month in which you can book a flight from Kalispell to St. Louis (average of $221). Flying from Kalispell to St. Louis in March is currently the most expensive (average of $404). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$357FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$318Average$610FlexibilityNo cancel feeOn-time69%

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