HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — STL
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

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 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 January 26, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/25. 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 2/105:04 pm
MCI
-
STL
1 stop29h 23m
Multiple Airlines
Sat 2/148:17 pm
STL
-
MCI
1 stop13h 12m
Multiple Airlines
Deal found 1/25$219
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
Sun 2/2210:14 am
MCI
-
STL
1 stop20h 37m
Multiple Airlines
Sun 3/110:11 pm
STL
-
MCI
1 stop25h 22m
Multiple Airlines
Deal found 1/25$231
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:15 pm
MCI
-
STL
1 stop4h 57m
Frontier
Thu 5/78:12 pm
STL
-
MCI
1 stop17h 18m
Frontier
Deal found 1/24$232
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
Sun 2/2210:14 am
MCI
-
STL
1 stop20h 37m
Frontier
Sun 3/13:49 pm
STL
-
MCI
2 stops18h 04m
Frontier
Deal found 1/25$238
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/46:15 am
MCI
-
STL
1 stop4h 30m
United Airlines
Sun 4/58:21 am
STL
-
MCI
1 stop6h 04m
United Airlines
Deal found 1/24$291
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/46:25 pm
MCI
-
STL
1 stop4h 40m
Southwest
Sun 4/54:00 pm
STL
-
MCI
Nonstop1h 10m
Southwest
Deal found 1/24$292
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/58:43 pm
MCI
-
STL
1 stop22h 01m
Frontier
Sat 2/73:46 pm
STL
-
MCI
1 stop28h 05m
Frontier
Deal found 1/24$295
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:26 am
MCI
-
STL
2 stops22h 57m
Multiple Airlines
Sat 2/78:22 pm
STL
-
MCI
1 stop13h 31m
Multiple Airlines
Deal found 1/24$313
This United Airlines deal was found by Cheapflights users on 1/25. 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 2/1910:24 am
MCI
-
STL
1 stop4h 05m
United Airlines
Mon 2/234:49 pm
STL
-
MCI
1 stop5h 10m
United Airlines
Deal found 1/25$317
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/315:04 pm
MCI
-
STL
1 stop15h 20m
Multiple Airlines
Sun 2/112:03 pm
STL
-
MCI
1 stop7h 48m
Multiple Airlines
Deal found 1/24$331
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:02 am
MCI
-
STL
1 stop4h 26m
American Airlines
Sun 4/56:33 pm
STL
-
MCI
1 stop5h 21m
American Airlines
Deal found 1/24$349

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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$219
(Kiwi.com)

One-way from

$80
(Orbitz)

Popular in

January

Cheapest in

November

Average price

$653
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. 20% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($23 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 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 January 26, 2026.
Use the filters below to find and compare flights from Kansas City to St. Louis that are best for you.

Fly from

Kansas City

Fly to

St. Louis

Route

Depart

Return

Price

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Tue 2/10

5:04 pm-10:27 pm

1 stop29h 23m

Lambert-St Louis

Sat 2/14

8:17 pm-9:29 am

1 stop13h 12m

$219

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sun 2/22

10:14 am-6:51 am

1 stop20h 37m

Lambert-St Louis

Sun 3/1

10:11 pm-11:33 pm

1 stop25h 22m

$231

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sun 2/22

10:14 am-6:51 am

1 stop20h 37m

Lambert-St Louis

Sun 3/1

3:49 pm-9:53 am

2 stops18h 04m

$238

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sat 4/4

6:15 am-10:45 am

1 stop4h 30m

Lambert-St Louis

Sun 4/5

8:21 am-2:25 pm

1 stop6h 04m

$291

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Thu 2/5

8:43 pm-6:44 pm

1 stop22h 01m

Lambert-St Louis

Sat 2/7

3:46 pm-7:51 pm

1 stop28h 05m

$295

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Thu 2/5

11:26 am-10:23 am

2 stops22h 57m

Lambert-St Louis

Sat 2/7

8:22 pm-9:53 am

1 stop13h 31m

$313

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Thu 2/19

9:10 am-2:29 pm

1 stop5h 19m

Lambert-St Louis

Mon 2/23

4:30 pm-11:17 pm

1 stop6h 47m

$317

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sat 1/31

5:04 pm-8:24 am

1 stop15h 20m

Lambert-St Louis

Sun 2/1

12:03 pm-7:51 pm

1 stop7h 48m

$331

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Wed 4/1

11:02 am-3:28 pm

1 stop4h 26m

Lambert-St Louis

Sun 4/5

6:33 pm-11:54 pm

1 stop5h 21m

$349

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sat 4/4

5:45 pm-6:50 pm

Nonstop1h 05m

Lambert-St Louis

Sun 4/5

8:25 am-9:35 am

Nonstop1h 10m

$361

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 21 results
1
2
3

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 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 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 January 26, 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 January 26, 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
4,268 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,268 reviews
Southwest
8.0
Very good
4,268 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 27 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 4h 30m. Frontier provides one of the quickest options available for as low as $291. There are 236 mi between Kansas City and St. Louis. This flight may include one or multiple stops.

  • 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 75% 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 $140. While the most popular route (Kansas City - Lambert-St Louis) can be booked for $219 on average, our data indicates $356 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$97Average$371FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights