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$49+ Cheap flights from St. Louis to Kansas City (STL - MCI)

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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MCI
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheap flight deals from St. Louis to Kansas City

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Kansas City (MCI). 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 September 19, 2025.

Round-trip from

$97
(Southwest)

One-way from

$49
(Southwest)

Popular in

January

Cheapest in

March

Average price

$244
From Lambert-St Louis to Kansas City
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One-way flight from Lambert-St Louis to Kansas City
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Highest demand for flights based on searches. 30% potential increase in price ($152 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Kansas City

Cheapest flights from St. Louis to Kansas City
Explore the most affordable flight options available from St. Louis to Kansas City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 19, 2025.

This Southwest deal was found by Cheapflights users on 9/18. 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 10/142:45 pmSTL - MCI
Nonstop1h 05mSouthwest
Wed 10/1510:40 amMCI - STL
Nonstop1h 05mSouthwest
Deal found 9/18$97
This Southwest deal was found by Cheapflights users on 9/17. 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.
Wed 10/154:25 pmSTL - MCI
1 stop6h 10mSouthwest
Wed 10/223:45 pmMCI - STL
1 stop3h 25mSouthwest
Deal found 9/17$117
This Southwest deal was found by Cheapflights users on 9/16. 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 10/135:05 pmSTL - MCI
1 stop5h 45mSouthwest
Mon 10/2010:50 amMCI - STL
Nonstop1h 00mSouthwest
Deal found 9/16$144
This Southwest deal was found by Cheapflights users on 9/17. 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 10/2010:15 pmSTL - MCI
Nonstop1h 05mSouthwest
Thu 10/235:30 amMCI - STL
1 stop4h 30mSouthwest
Deal found 9/17$167
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/157:52 pmSTL - MCI
2 stops19h 23mFrontier
Wed 10/227:02 pmMCI - STL
1 stop14h 05mFrontier
Deal found 9/17$219
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/107:52 pmSTL - MCI
1 stop22h 03mFrontier
Fri 10/178:38 pmMCI - STL
1 stop12h 29mFrontier
Deal found 9/17$232

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Kansas City 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 September 19, 2025.
Use the filters below to find and compare flights from St. Louis to Kansas City that are best for you.

Fly from

St. Louis

Fly to

Kansas City

Route

Depart

Return

Price

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Tue 10/14

6:35 am-11:30 am

1 stop4h 55m

Kansas City

Wed 10/15

10:40 am-11:45 am

Nonstop1h 05m

$107

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Wed 10/15

4:25 pm-10:35 pm

1 stop6h 10m

Kansas City

Wed 10/22

3:45 pm-7:10 pm

1 stop3h 25m

$117

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Mon 10/20

10:15 pm-11:20 pm

Nonstop1h 05m

Kansas City

Thu 10/23

5:30 am-10:00 am

1 stop4h 30m

$167

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Fri 10/10

7:52 pm-5:55 pm

1 stop22h 03m

Kansas City

Fri 10/17

8:38 pm-9:07 am

1 stop12h 29m

$232

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Sat 11/15

5:50 pm-7:00 pm

Nonstop1h 10m

Kansas City

Sun 11/16

7:45 am-1:30 pm

1 stop5h 45m

$254

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Wed 10/15

2:45 pm-3:50 pm

Nonstop1h 05m

Kansas City

Mon 10/20

10:50 am-11:50 am

Nonstop1h 00m

$254

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Mon 10/13

5:05 pm-10:50 pm

1 stop5h 45m

Kansas City

Mon 10/20

3:35 pm-9:30 pm

1 stop5h 55m

$264

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Thu 12/18

10:30 pm-11:40 pm

Nonstop1h 10m

$49

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Wed 12/17

2:25 pm-3:35 pm

Nonstop1h 10m

$49

St. LouisKansas City

STL - MCI

STLMCI

Lambert-St Louis

Tue 11/11

10:20 am-11:30 am

Nonstop1h 10m

$49

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 16 results
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The best insider tips for St. Louis to Kansas City flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Kansas City trip
Airports
STL

Expect security screening at STL to take 5 to 10 minutes during off-peak times. Check real-time wait times online before heading to the airport.

Read more about STLby Taryn White
MCI

For quick access to downtown KC, take the RideKC bus from MCI. It departs hourly and is free, taking about an hour to reach downtown.

Read more about MCIby Matt Meltzer
Our travel experts
Matt Meltzer

Matt Meltzer

Expert on MCI

Matt Meltzer

Matt Meltzer

Matt Meltzer has been a travel writer for over a decade, covering U.S. domestic locations and hotels for Thrillist, Fifty Grande, Matador Network, Conde Nast Traveler, and other top publications. He's won multiple travel journalism awards from the Society of American Travel Writers and North American Travel Journalists Association, and currently resides in South Florida.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more

Best time to book a flight from St. Louis to Kansas City

Have a flexible travel schedule? Discover the best time to fly to Kansas City from St. Louis 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 St. Louis to Kansas City

What is the cheapest month to book a flight from St. Louis to Kansas City?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Kansas City (average of $298). Flying from St. Louis to Kansas City in June is currently the most expensive (average of $352). 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 STL to MCI?

Find hourly flight availability from St. Louis to Kansas City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 19, 2025.

It’s optimal to fly from St. Louis to Kansas City in the evening. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Kansas City

Get insights into the airlines that provide service to Kansas City. 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 Kansas City. Reviews last updated September 19, 2025.
Read through reviews of airlines operating flights from St. Louis to Kansas City, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Kansas City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Kansas City?

    To fly from St. Louis to Kansas City, you need to book a flight from Lambert-St Louis (STL) to Kansas City (MCI). Nonstop flights to Kansas City from Lambert-St Louis take 1h 05m on average. When it comes time to book airfare, you have a few options: there are 2 outbound flights from Lambert-St Louis to Kansas City offered by 1 airline.

  • How popular is this St. Louis to Kansas City flight route?

    Flights from Lambert-St Louis to Kansas City have been viewed 5 times in the past calendar month.

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

    There are many flights that can get you from St. Louis to Kansas City in 4h 55m. Fly via Southwest to get the fastest option. There are 236 mi between St. Louis and Kansas City.

  • What is the cheapest airline to fly from St. Louis to Kansas City round-trip?

    Southwest, at $97, was found to be the cheapest airline from St. Louis to Kansas City.. Southwest is 72% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from St. Louis to Kansas City?

    Looking for the cheapest flight from St. Louis to Kansas City? While on average our users pay $281, our data indicates the cheapest price to be $58. The most popular route (Lambert-St Louis - Kansas City), is priced around $97.

  • Can I find deals for flights from St. Louis to Kansas City that include hotel bookings?

    Yes. In addition to deals on St. Louis to Kansas City flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Kansas City?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Kansas City.

  • Can I find deals for business class flights from St. Louis to Kansas City?

    Yes. Cheapflights offers flight deals from St. Louis to Kansas City 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 St. Louis to Kansas City?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Kansas City (average of $298). Flying from St. Louis to Kansas City in June is currently the most expensive (average of $352). 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 Kansas City?

Book flights to Kansas City if you plan to visit one of these locations
Shawnee
Lee's Summit
Belton
Warrensburg
North Kansas City
Liberty
Kansas City
Overland Park
Lenexa
Lansing
Lawrence
Olathe

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from St. Louis to Kansas City

Discover the top airline that operate flights from St. Louis to Kansas City. 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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$97Average$295FlexibilityNo cancel feeOn-time63%

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