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

$49+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — STL
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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

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 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$97
(Southwest)

One-way from

$49
(Southwest)

Popular in

February

Cheapest in

March

Average price

$152
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
High demand for flights, 7% potential price rise
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find 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 25, 2025.

This Southwest deal was found by Cheapflights users on 3/24. 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.
Thu 5/15:40 amMCI - STL
Nonstop1h 05mSouthwest
Mon 5/51:55 pmSTL - MCI
Nonstop1h 05mSouthwest
Deal found 3/24$97
This CheapOair deal was found by Cheapflights users on 3/23. 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 4/138:35 pmMCI - STL
1 stop12h 31mFrontier
Sun 4/2012:41 pmSTL - MCI
1 stop7h 04mFrontier
Deal found 3/23$226
This American Airlines deal was found by Cheapflights users on 3/24. 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 6/115:49 pmMCI - STL
1 stop5h 11mAmerican Airlines
Fri 6/135:29 pmSTL - MCI
1 stop5h 44mAmerican Airlines
Deal found 3/24$330
This Mytrip deal was found by Cheapflights users on 3/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/184:23 pmMCI - STL
3 stops43h 22mMultiple Airlines
Tue 4/226:10 pmSTL - MCI
2 stops20h 32mMultiple Airlines
Deal found 3/23$355
This United Airlines deal was found by Cheapflights users on 3/23. 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 6/48:00 amMCI - STL
1 stop7h 30mUnited Airlines
Thu 6/58:10 amSTL - MCI
2 stops15h 19mUnited Airlines
Deal found 3/23$549

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 25, 2025.
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

Thu 5/1

5:40 am-6:45 am

Nonstop1h 05m

Lambert-St Louis

Mon 5/5

1:55 pm-3:00 pm

Nonstop1h 05m

$97

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sun 4/13

8:35 pm-9:06 am

1 stop12h 31m

Lambert-St Louis

Sun 4/20

12:41 pm-7:45 pm

1 stop7h 04m

$226

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Wed 6/11

5:49 pm-11:00 pm

1 stop5h 11m

Lambert-St Louis

Fri 6/13

5:29 pm-11:13 pm

1 stop5h 44m

$330

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 4/18

4:23 pm-11:45 am

3 stops43h 22m

Lambert-St Louis

Tue 4/22

6:10 pm-2:42 pm

2 stops20h 32m

$355

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Wed 6/4

8:00 am-3:30 pm

1 stop7h 30m

Lambert-St Louis

Thu 6/5

8:10 am-11:29 pm

2 stops15h 19m

$549

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 4/28

5:40 am-6:45 am

Nonstop1h 05m

$49

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Sat 4/5

8:37 pm-11:37 am

1 stop15h 00m

$87

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Wed 5/7

2:45 pm-9:15 am

2 stops18h 30m

$136

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 5/19

10:51 am-6:41 pm

2 stops7h 50m

$158

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 5/23

5:15 am-9:54 am

1 stop4h 39m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 11 results
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
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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, August is the cheapest month in which you can book a flight from Kansas City to St. Louis (average of $311). Flying from Kansas City to St. Louis in March is currently the most expensive (average of $356). 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 25, 2025.

When flying from Kansas City to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 13% versus a flight in the afternoon.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 25, 2025.
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,605 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
7,876 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
6.0
Okay
3,273 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 00m 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 13 times in the past calendar month.

  • What are the cheapest airlines flying 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. Additional options worth looking into are Frontier and American Airlines, starting at $279 and $330 round-trip. You may be able to fly from Kansas City to St. Louis for 71% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Kansas City to St. Louis one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $49. Frontier flights start at $87 while deals on Spirit Airlines start at $136 one-way.

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

    Looking at all options, your cheapest flight can be booked for $128. While the most popular route (Kansas City - Lambert-St Louis) can be booked for $112 on average our data indicates $326 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, August is the cheapest month in which you can book a flight from Kansas City to St. Louis (average of $311). Flying from Kansas City to St. Louis in March is currently the most expensive (average of $356). 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
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
Chesterfield

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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$117Average$347FlexibilityNo 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.