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$80+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — STL
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
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Cheap flight deals from Kansas City to St. Louis

Cheapest flights from Kansas City to St. Louis
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 March 13, 2026.

This CheapOair deal was found by Cheapflights users on 3/10. 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.
Fri 5/12:15 pm
MCI
-
STL
1 stop5h 06m
Frontier
Fri 5/88:12 pm
STL
-
MCI
1 stop17h 54m
Frontier
Deal found 3/10$212
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Thu 4/28:46 pm
MCI
-
STL
1 stop13h 02m
Frontier
Fri 4/38:16 pm
STL
-
MCI
1 stop23h 42m
Frontier
Deal found 3/10$222
This CheapOair deal was found by Cheapflights users on 3/9. 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 5/82:15 pm
MCI
-
STL
1 stop4h 57m
Frontier
Sun 5/108:12 pm
STL
-
MCI
1 stop17h 18m
Frontier
Deal found 3/9$226
This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/612:40 pm
MCI
-
STL
Nonstop1h 05m
Southwest
Sat 4/1110:35 am
STL
-
MCI
Nonstop1h 10m
Southwest
Deal found 3/10$233
This Southwest deal was found by Cheapflights users on 3/11. 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.
Wed 4/811:55 am
MCI
-
STL
Nonstop1h 05m
Southwest
Wed 4/156:40 pm
STL
-
MCI
1 stop4h 00m
Southwest
Deal found 3/11$243
This Southwest deal was found by Cheapflights users on 3/12. 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 4/245:50 pm
MCI
-
STL
Nonstop1h 05m
Southwest
Sat 4/2512:35 pm
STL
-
MCI
2 stops7h 55m
Southwest
Deal found 3/12$248
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Wed 4/812:24 pm
MCI
-
STL
2 stops29h 10m
Multiple Airlines
Wed 4/158:23 pm
STL
-
MCI
1 stop14h 35m
Multiple Airlines
Deal found 3/11$276

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$212
(CheapOair)

One-way from

$80
(Frontier)

Popular in

February

Cheapest in

November

Average price

$399
Provider with most accurate pricing for Kansas City-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kansas City-Lambert-St Louis flights.
Search Deals
From Kansas City to Lambert-St Louis
Search Deals
One-way flight from Kansas City to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 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

Price

Cheapest round-trip
Quickest round-trip

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Thu 4/2

5:35 pm-6:40 pm

Nonstop1h 05m

Lambert-St Louis

Thu 4/9

9:50 pm-10:55 pm

Nonstop1h 05m

$233

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 4/24

5:50 pm-6:55 pm

Nonstop1h 05m

Lambert-St Louis

Sat 4/25

2:05 pm-6:55 pm

1 stop4h 50m

$242

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 4/6

5:35 pm-6:40 pm

Nonstop1h 05m

Lambert-St Louis

Wed 4/8

5:35 am-11:35 am

1 stop6h 00m

$243

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Tue 3/31

11:05 am-12:10 pm

Nonstop1h 05m

Lambert-St Louis

Wed 4/1

6:10 am-10:55 am

1 stop4h 45m

$243

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 4/6

6:50 pm-12:05 am

1 stop5h 15m

Lambert-St Louis

Sat 4/11

2:05 pm-6:55 pm

1 stop4h 50m

$251

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Tue 5/5

5:25 am-9:30 am

1 stop4h 05m

Lambert-St Louis

Fri 5/8

5:15 pm-11:35 pm

1 stop6h 20m

$253

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 5/1

12:05 pm-1:10 pm

Nonstop1h 05m

Lambert-St Louis

Sun 5/3

8:30 am-2:15 pm

1 stop5h 45m

$312

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 5/25

8:25 am-9:30 am

Nonstop1h 05m

Lambert-St Louis

Mon 6/1

4:40 pm-11:00 pm

1 stop6h 20m

$312
Cheapest one-way
Quickest one-way

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 6/8

6:05 pm-7:10 pm

Nonstop1h 05m

$117

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Wed 6/10

1:40 pm-2:45 pm

Nonstop1h 05m

$117

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 March.
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 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.
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, May is the cheapest month in which you can book a flight from Kansas City to St. Louis (average of $97). Flying from Kansas City to St. Louis in August is currently the most expensive (average of $583). 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 March 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
Our travel experts
Matt Meltzer

Matt Meltzer

Expert on MCI

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 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

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 March 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.
Southwest
8.0
Very good
4,319 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
Southwest
8.0
Very good
4,319 reviews
Southwest
8.0
Very good
4,319 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

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.

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

    Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Kansas City. Booking flights from Kansas City (MCI) to Lambert-St Louis (STL) should be relatively easy as there are 2 daily flights to St. Louis from 1 airline. 1h 05m is how long a flight from Kansas City to Lambert-St Louis will take if you book a nonstop flight.

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

    Flights from Kansas City to Lambert-St Louis have been viewed 25 times in the past calendar month.

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

    A quick flight from Kansas City to St. Louis can take about 1h 05m. Southwest provides one of the quickest options available for as low as $233. There are 236 mi between Kansas City and St. Louis. All flights are typically nonstop.

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

    Our cheapest airline available from Kansas City to St. Louis is Southwest. Our recent data shows that you can find tickets from as low as $97 on this airline. You may be able to fly from Kansas City to St. Louis for 78% less than the average price by searching for this airline.

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

    Looking at all options, your cheapest flight can be booked for $174. While the most popular route (Kansas City - Lambert-St Louis) can be booked for $233 on average, our data indicates $349 when flying from Kansas City to St. Louis.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Kansas City to St. Louis (average of $97). Flying from Kansas City to St. Louis in August is currently the most expensive (average of $583). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$97Average$443FlexibilityNo cancel feeOn-time63%

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