$76+ Cheap flights from Kansas City to St. Louis (MCI - 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — STL
Jul 13 — Jul 201
Round-trip
1 adult, Economy
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Find cheap flights from Kansas City 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
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Cheapest flights from Kansas City to St. LouisExplore the most affordable flight options available from Kansas City to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
Explore the most affordable flight options available from Kansas City to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Fri 7/106:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Fri 7/174:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Deal found 6/12![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 7/106:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Sun 7/126:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/10![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Thu 8/201:50 pm
MCI
- STL
1 stop29h 46m
Frontier
Sun 8/306:33 pm
STL
- MCI
1 stop22h 51m
Frontier
Deal found 6/12![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Tue 7/74:58 pm
MCI
- STL
1 stop26h 25m
Frontier
Tue 7/146:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/10![Frontier logo]()
$227
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/11:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Wed 7/88:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Deal found 6/10![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 9/96:11 pm
MCI
- STL
1 stop15h 29m
Frontier
Thu 9/106:41 pm
STL
- MCI
2 stops22h 35m
Frontier
Deal found 6/12![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Fri 7/176:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Sun 7/197:10 pm
STL
- MCI
1 stop20h 37m
Frontier
Deal found 6/11![Frontier logo]()
$252
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/54:32 pm
MCI
- STL
1 stop25h 43m
Frontier
Tue 7/78:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Deal found 6/12![Frontier logo]()
$260
This eDestinos deal was found by Cheapflights users on 6/12. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:16 pm
MCI
- STL
1 stop14h 36m
Frontier
Mon 7/64:57 pm
STL
- MCI
2 stops20h 03m
Frontier
Deal found 6/12![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/86:07 pm
MCI
- STL
1 stop23h 30m
Multiple Airlines
Wed 7/154:57 pm
STL
- MCI
2 stops40h 53m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$269
Best flights from Kansas City to St. LouisDiscover carefully curated flight deals from Kansas City to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
Discover carefully curated flight deals from Kansas City to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
This eDestinos deal was found by Cheapflights users on 6/12. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:16 pm
MCI
- STL
1 stop14h 36m
Frontier
Mon 7/64:57 pm
STL
- MCI
2 stops20h 03m
Frontier
Deal found 6/12![Frontier logo]()
$263
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:20 pm
MCI
- STL
Nonstop1h 05m
Southwest
Thu 7/234:45 pm
STL
- MCI
Nonstop1h 05m
Southwest
Deal found 6/8![Southwest logo]()
$381
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 8/315:08 pm
MCI
- STL
1 stop5h 51m
United Airlines
Tue 9/17:25 am
STL
- MCI
1 stop4h 55m
United Airlines
Deal found 6/12![United Airlines logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Thu 8/61:45 pm
MCI
- STL
2 stops19h 12m
Frontier
Mon 8/108:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Deal found 6/11![Frontier logo]()
$299
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/138:05 am
MCI
- STL
Nonstop1h 05m
Southwest
Thu 7/169:45 pm
STL
- MCI
Nonstop1h 10m
Southwest
Deal found 6/11![Southwest logo]()
$411
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/251:43 pm
MCI
- STL
1 stop7h 03m
United Airlines
Wed 8/268:00 am
STL
- MCI
1 stop4h 20m
United Airlines
Deal found 6/10![United Airlines logo]()
$421
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:15 am
MCI
- STL
1 stop5h 55m
Southwest
Mon 7/69:45 pm
STL
- MCI
Nonstop1h 10m
Southwest
Deal found 6/12![Southwest logo]()
$411
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/107:10 pm
MCI
- STL
1 stop4h 45m
Southwest
Sun 7/129:45 pm
STL
- MCI
Nonstop1h 10m
Southwest
Deal found 6/8![Southwest logo]()
$411
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:00 pm
MCI
- STL
Nonstop1h 05m
Southwest
Mon 9/78:30 am
STL
- MCI
Nonstop1h 05m
Southwest
Deal found 6/9![Southwest logo]()
$411
Last-minute flights from Kansas City to St. LouisDiscover last-minute flight deals from Kansas City to St. Louis. Data last updated June 13, 2026 and is based on user searches.
Discover last-minute flight deals from Kansas City to St. Louis. Data last updated June 13, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/11:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Wed 7/88:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Deal found 6/10![Frontier logo]()
$240
This eDestinos deal was found by Cheapflights users on 6/12. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:16 pm
MCI
- STL
1 stop14h 36m
Frontier
Mon 7/64:57 pm
STL
- MCI
2 stops20h 03m
Frontier
Deal found 6/12![Frontier logo]()
$263
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/31:45 pm
MCI
- STL
1 stop5h 08m
Frontier
Sat 7/42:56 pm
STL
- MCI
1 stop24h 51m
Frontier
Deal found 6/9![Frontier logo]()
$274
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/54:32 pm
MCI
- STL
1 stop25h 43m
Frontier
Tue 7/78:08 pm
STL
- MCI
1 stop16h 52m
Frontier
Deal found 6/12![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Tue 7/74:58 pm
MCI
- STL
1 stop26h 25m
Frontier
Tue 7/146:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/10![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/86:07 pm
MCI
- STL
1 stop23h 30m
Multiple Airlines
Wed 7/154:57 pm
STL
- MCI
2 stops40h 53m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Fri 7/106:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Fri 7/174:57 pm
STL
- MCI
1 stop24h 13m
Frontier
Deal found 6/12![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 7/106:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Sun 7/126:34 pm
STL
- MCI
1 stop22h 36m
Frontier
Deal found 6/10![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Fri 7/176:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Sun 7/197:10 pm
STL
- MCI
1 stop20h 37m
Frontier
Deal found 6/11![Frontier logo]()
$252
One-way flights from Kansas City to St. LouisSearch for one-way flight options from Kansas City to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
Search for one-way flight options from Kansas City to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:16 pm
MCI
- STL
1 stop14h 36m
Frontier
Deal found 6/8![Frontier logo]()
$76
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/8![Frontier logo]()
$77
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/8![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Mon 8/106:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/11![Frontier logo]()
$82
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/8![Frontier logo]()
$85
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:16 pm
MCI
- STL
1 stop23h 14m
Frontier
Deal found 6/8![Frontier logo]()
$88
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:11 pm
MCI
- STL
1 stop15h 29m
Frontier
Deal found 6/9![Frontier logo]()
$89
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:07 pm
MCI
- STL
1 stop14h 50m
Frontier
Deal found 6/8![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Mon 7/66:07 pm
MCI
- STL
1 stop23h 30m
Frontier
Deal found 6/12![Frontier logo]()
$99
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:19 pm
MCI
- STL
1 stop23h 11m
Frontier
Deal found 6/8![Frontier logo]()
$100
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/41:45 pm
MCI
- STL
1 stop5h 38m
Frontier
Deal found 6/9![Frontier logo]()
$105
Find flight deals from Kansas City to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Kansas City (MCI) 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 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $167 (Kiwi.com) |
One-way from | $76 (Kiwi.com) |
Popular in | February |
Cheapest in | November |
Average price | $522 |
Cheapflights Fare Finder
Customize your flight search to find flights from Kansas City 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 13, 2026.
Use the filters below to find and compare flights from Kansas City to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Fri 7/3
6:16 pm-8:52 am
1 stop14h 36m
Lambert-St Louis
Mon 7/6
4:57 pm-1:00 pm
2 stops20h 03m
$263
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Thu 8/6
1:45 pm-8:57 am
2 stops19h 12m
Lambert-St Louis
Mon 8/10
8:08 pm-1:00 pm
1 stop16h 52m
$299
Quickest round-trip
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Tue 7/21
5:20 pm-6:25 pm
Nonstop1h 05m
Lambert-St Louis
Thu 7/23
4:45 pm-5:50 pm
Nonstop1h 05m
$381
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Mon 8/31
5:08 pm-10:59 pm
1 stop5h 51m
Lambert-St Louis
Tue 9/1
7:25 am-12:20 pm
1 stop4h 55m
$389
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Mon 7/13
8:05 am-9:10 am
Nonstop1h 05m
Lambert-St Louis
Thu 7/16
9:45 pm-10:55 pm
Nonstop1h 10m
$411
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Fri 7/3
6:15 am-12:10 pm
1 stop5h 55m
Lambert-St Louis
Mon 7/6
9:45 pm-10:55 pm
Nonstop1h 10m
$411
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Fri 7/10
7:10 pm-11:55 pm
1 stop4h 45m
Lambert-St Louis
Sun 7/12
9:45 pm-10:55 pm
Nonstop1h 10m
$411
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Fri 9/4
5:00 pm-6:05 pm
Nonstop1h 05m
Lambert-St Louis
Mon 9/7
8:30 am-9:35 am
Nonstop1h 05m
$411
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Tue 8/25
1:43 pm-8:46 pm
1 stop7h 03m
Lambert-St Louis
Wed 8/26
8:00 am-12:20 pm
1 stop4h 20m
$421
Cheapest one-way
Kansas CitySt. Louis
MCI - STL
MCISTL
Kansas City
Tue 9/8
6:25 am-10:55 am
1 stop4h 30m
$116
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Kansas City 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 Kansas City 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 Kansas City-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Kansas City-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Kansas City-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Kansas City-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 Kansas City-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 Kansas City to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Kansas City with our price prediction graph.
MCI-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 Kansas City to St. Louis
What is the cheapest month to book a flight from Kansas City to St. Louis?
Currently, November is the cheapest month in which you can book a flight from Kansas City to St. Louis (average of $171). Flying from Kansas City to St. Louis in February is currently the most expensive (average of $765). 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 MCI to STL?
Find hourly flight availability from Kansas City 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 13, 2026.
When flying from Kansas City to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
The best insider tips for Kansas City to St. Louis flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Kansas City to St. Louis trip
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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 13, 2026.
Read reviews from past customers who have flown Southwest from Kansas City to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Kansas City 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
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
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Kansas City and St. Louis flights
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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 13, 2026.
Top airline flying from Kansas City to St. Louis
Discover the top airline that operate flights from Kansas City 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 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$513 | FlexibilityNo cancel fee | On-time63% |