$149+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — STL
Jul 3 — Jul 101
Round-trip
1 adult, Economy
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Find cheap flights from Kalispell to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Kalispell to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Kalispell to St. LouisExplore 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 3, 2026.
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 3, 2026.
This Delta deal was found by Cheapflights users on 6/1. 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 9/246:10 pm
FCA
- STL
1 stop5h 24m
Delta
Sun 9/276:25 am
STL
- FCA
1 stop8h 10m
Delta
Deal found 6/1![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 6/1. 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.
Wed 9/233:58 pm
FCA
- STL
1 stop6h 01m
United Airlines
Mon 9/285:10 am
STL
- FCA
1 stop5h 54m
United Airlines
Deal found 6/1![United Airlines logo]()
$323
This Alaska Airlines deal was found by Cheapflights users on 5/29. 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.
Wed 10/212:03 pm
FCA
- STL
1 stop8h 56m
Alaska Airlines
Sat 10/246:00 am
STL
- FCA
1 stop7h 21m
Alaska Airlines
Deal found 5/29![Alaska Airlines logo]()
$337
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:26 pm
FCA
- STL
1 stop7h 17m
American Airlines
Mon 9/285:01 am
STL
- FCA
2 stops10h 32m
American Airlines
Deal found 6/1![American Airlines logo]()
$342
This United Airlines deal was found by Cheapflights users on 5/30. 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.
Wed 6/105:28 pm
FCA
- STL
1 stop5h 29m
United Airlines
Sun 6/145:10 am
STL
- FCA
1 stop5h 51m
United Airlines
Deal found 5/30![United Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/1. 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.
Wed 10/215:20 pm
FCA
- STL
1 stop5h 25m
United Airlines
Sat 10/249:04 am
STL
- FCA
2 stops13h 23m
United Airlines
Deal found 6/1![United Airlines logo]()
$392
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:51 pm
FCA
- STL
1 stop7h 08m
American Airlines
Sun 6/145:29 am
STL
- FCA
1 stop7h 05m
American Airlines
Deal found 6/1![American Airlines logo]()
$404
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Thu 8/205:04 pm
FCA
- STL
1 stop5h 36m
United Airlines
Mon 8/244:40 pm
STL
- FCA
1 stop5h 41m
United Airlines
Deal found 6/2![United Airlines logo]()
$489
Best flights from Kalispell to St. LouisDiscover carefully curated flight deals from Kalispell to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 3, 2026.
Discover carefully curated flight deals from Kalispell to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 3, 2026.
This Delta deal was found by Cheapflights users on 6/1. 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 9/246:10 pm
FCA
- STL
1 stop5h 24m
Delta
Sun 9/276:25 am
STL
- FCA
1 stop8h 10m
Delta
Deal found 6/1![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 5/29. 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.
Wed 10/212:03 pm
FCA
- STL
1 stop8h 56m
Alaska Airlines
Sat 10/246:00 am
STL
- FCA
1 stop7h 21m
Alaska Airlines
Deal found 5/29![Alaska Airlines logo]()
$337
This United Airlines deal was found by Cheapflights users on 6/1. 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.
Wed 10/215:20 pm
FCA
- STL
1 stop5h 25m
United Airlines
Sat 10/249:04 am
STL
- FCA
2 stops13h 23m
United Airlines
Deal found 6/1![United Airlines logo]()
$392
Last-minute flights from Kalispell to St. LouisDiscover last-minute flight deals from Kalispell to St. Louis. Data last updated June 3, 2026 and is based on user searches.
Discover last-minute flight deals from Kalispell to St. Louis. Data last updated June 3, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/30. 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.
Wed 6/105:28 pm
FCA
- STL
1 stop5h 29m
United Airlines
Sun 6/145:10 am
STL
- FCA
1 stop5h 51m
United Airlines
Deal found 5/30![United Airlines logo]()
$369
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:51 pm
FCA
- STL
1 stop7h 08m
American Airlines
Sun 6/145:29 am
STL
- FCA
1 stop7h 05m
American Airlines
Deal found 6/1![American Airlines logo]()
$404
This United Airlines deal was found by Cheapflights users on 5/30. 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.
Thu 6/1110:42 am
FCA
- STL
2 stops9h 48m
United Airlines
Sun 6/145:10 am
STL
- FCA
1 stop5h 51m
United Airlines
Deal found 5/30![United Airlines logo]()
$540
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Sun 6/145:28 pm
FCA
- STL
1 stop5h 29m
United Airlines
Wed 6/175:10 am
STL
- FCA
1 stop5h 51m
United Airlines
Deal found 5/31![United Airlines logo]()
$496
This United Airlines deal was found by Cheapflights users on 6/1. 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 6/1610:42 am
FCA
- STL
2 stops9h 48m
United Airlines
Sat 6/204:45 pm
STL
- FCA
1 stop6h 02m
United Airlines
Deal found 6/1![United Airlines logo]()
$551
This United Airlines deal was found by Cheapflights users on 5/30. 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 6/165:28 pm
FCA
- STL
1 stop5h 29m
United Airlines
Tue 6/234:48 pm
STL
- FCA
1 stop5h 59m
United Airlines
Deal found 5/30![United Airlines logo]()
$569
This American Airlines deal was found by Cheapflights users on 6/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/164:48 pm
FCA
- STL
1 stop6h 28m
American Airlines
Sat 6/209:04 am
STL
- FCA
1 stop7h 58m
American Airlines
Deal found 6/1![American Airlines logo]()
$604
This American Airlines deal was found by Cheapflights users on 5/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/224:48 pm
FCA
- STL
1 stop6h 28m
American Airlines
Fri 6/268:36 am
STL
- FCA
1 stop7h 23m
American Airlines
Deal found 5/30![American Airlines logo]()
$627
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 June 3, 2026.
Search for one-way flight options from Kalispell to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 3, 2026.
This Delta deal was found by Cheapflights users on 6/1. 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 9/246:10 pm
FCA
- STL
1 stop5h 24m
Delta
Deal found 6/1![Delta logo]()
$149
This American Airlines deal was found by Cheapflights users on 6/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:50 pm
FCA
- STL
1 stop6h 24m
American Airlines
Deal found 6/2![American Airlines logo]()
$202
This Expedia deal was found by Cheapflights users on 6/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:33 am
FCA
- STL
1 stop6h 19m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:18 am
FCA
- STL
2 stops30h 12m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$283
This Delta deal was found by Cheapflights users on 5/30. 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.
Wed 8/196:20 am
FCA
- STL
2 stops10h 18m
Delta
Deal found 5/30![Delta logo]()
$291
This United Airlines deal was found by Cheapflights users on 5/29. 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.
Wed 8/196:20 am
FCA
- STL
1 stop5h 20m
United Airlines
Deal found 5/29![United Airlines logo]()
$369
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 June 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $297 (Delta) |
One-way from | $149 (Delta) |
Popular in | January |
Cheapest in | November |
Average price | $510 |
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 3, 2026.
Use the filters below to find and compare flights from Kalispell to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Thu 9/24
6:10 pm-12:34 am
1 stop5h 24m
Lambert-St Louis
Sun 9/27
6:25 am-1:35 pm
1 stop8h 10m
$297
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 10/21
2:03 pm-11:59 pm
1 stop8h 56m
Lambert-St Louis
Sat 10/24
6:00 am-12:21 pm
1 stop7h 21m
$337
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 10/21
5:20 pm-11:45 pm
1 stop5h 25m
Lambert-St Louis
Sat 10/24
9:04 am-9:27 pm
2 stops13h 23m
$392
Cheapest one-way
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Thu 9/24
6:10 pm-12:34 am
1 stop5h 24m
$149
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 8/19
4:50 pm-12:14 am
1 stop6h 24m
$202
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Tue 8/11
6:33 am-1:52 pm
1 stop6h 19m
$215
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 8/19
10:18 am-5:30 pm
2 stops30h 12m
$283
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 8/19
6:20 am-5:38 pm
2 stops10h 18m
$291
Quickest one-way
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 8/19
6:20 am-12:40 pm
1 stop5h 20m
$369
Sorted by cheapest first
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
FCA-STL
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
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 3, 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.
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Food
7.2
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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Kalispell and St. Louis flights
Browse other Kalispell and St. Louis flight options. Last updated on June 3, 2026.
Other flights from Kalispell
Browse through other flights departing from Kalispell. Flights are based on user searches made on Cheapflights and were last updated on June 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 3, 2026.
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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$287 | Average$356 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$544 | FlexibilityNo cancel fee | On-time69% |