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 1h. Southwest provides one of the quickest options available for as low as $112. 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 73% less than the average price by searching for this airline.

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.

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).

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

Looking at all options, your cheapest flight can be booked for $38. While the most popular route (Kansas City - Lambert-St Louis) can be booked for $137 on average, our data indicates $329 when flying from Kansas City to St. Louis.

Most accurate provider : When it comes to deals on Kansas City-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Kansas City-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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 is 1 daily flight 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.

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.

$49+ Flights from Kansas City to St. Louis

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$97 (Southwest)
One-way from	$49 (Southwest)
Popular in	February
Cheapest in	March
Average price	$489

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, 10% potential price rise

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($22 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 October 28, 2025.

Thu 12/46:15 amMCI - STL

Nonstop1h 15mSouthwest

Mon 12/82:25 pmSTL - MCI

Nonstop1h 10mSouthwest

Deal found 10/27

$97

Tue 11/116:49 pmMCI - STL

1 stop14h 18mFrontier

Sat 11/157:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/26

$119

Mon 11/108:28 pmMCI - STL

1 stop12h 39mFrontier

Wed 11/127:45 pmSTL - MCI

1 stop23h 53mFrontier

Deal found 10/27

$121

Fri 11/148:28 pmMCI - STL

1 stop12h 39mFrontier

Sat 11/157:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/26

$181

Mon 11/178:28 pmMCI - STL

1 stop12h 39mFrontier

Tue 11/187:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$185

Best flights from Kansas City to St. Louis
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 October 28, 2025.

Thu 12/412:00 pmMCI - STL

Nonstop1h 00mSouthwest

Mon 12/811:15 amSTL - MCI

2 stops6h 00mSouthwest

Deal found 10/27

$112

Fri 1/231:44 pmMCI - STL

1 stop8h 49mMultiple Airlines

Sun 1/255:11 pmSTL - MCI

1 stop19h 28mMultiple Airlines

Deal found 10/26

$170

Fri 11/148:28 pmMCI - STL

1 stop12h 39mFrontier

Sat 11/157:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/26

$181

Mon 11/178:28 pmMCI - STL

1 stop12h 39mFrontier

Tue 11/187:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$185

Tue 11/186:49 pmMCI - STL

1 stop14h 18mMultiple Airlines

Wed 11/197:24 pmSTL - MCI

1 stop16h 39mMultiple Airlines

Deal found 10/27

$212

Fri 11/148:28 pmMCI - STL

1 stop12h 39mFrontier

Sun 11/167:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/27

$234

Mon 11/178:28 pmMCI - STL

1 stop12h 39mMultiple Airlines

Wed 11/197:45 pmSTL - MCI

2 stops24h 18mMultiple Airlines

Deal found 10/27

$245

Fri 11/148:28 pmMCI - STL

1 stop12h 39mFrontier

Thu 11/209:54 pmSTL - MCI

2 stops21h 39mFrontier

Deal found 10/27

$286

Last-minute flights from Kansas City to St. Louis
Discover last-minute flight deals from Kansas City to St. Louis. Data last updated October 28, 2025 and is based on user searches.

Fri 10/318:28 pmMCI - STL

1 stop12h 39mFrontier

Sun 11/27:45 pmSTL - MCI

1 stop23h 53mFrontier

Deal found 10/26

$214

Mon 11/108:28 pmMCI - STL

1 stop12h 39mFrontier

Wed 11/127:45 pmSTL - MCI

1 stop23h 53mFrontier

Deal found 10/27

$121

Tue 11/116:49 pmMCI - STL

1 stop14h 18mFrontier

Sat 11/157:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/26

$119

Wed 11/126:49 pmMCI - STL

2 stops15h 23mFrontier

Tue 11/187:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$192

Wed 11/126:49 pmMCI - STL

2 stops15h 23mFrontier

Sat 11/157:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/27

$216

Fri 11/148:28 pmMCI - STL

1 stop12h 39mFrontier

Sat 11/157:45 pmSTL - MCI

1 stop23h 48mFrontier

Deal found 10/26

$181

Sat 11/158:28 pmMCI - STL

1 stop12h 39mFrontier

Tue 11/187:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$197

Sun 11/168:28 pmMCI - STL

2 stops16h 49mFrontier

Tue 11/187:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$198

Sun 11/168:28 pmMCI - STL

1 stop12h 39mFrontier

Mon 11/177:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$218

Mon 11/178:28 pmMCI - STL

1 stop12h 39mFrontier

Tue 11/187:45 pmSTL - MCI

1 stop21h 34mFrontier

Deal found 10/27

$185

Tue 11/186:49 pmMCI - STL

1 stop14h 18mMultiple Airlines

Wed 11/197:24 pmSTL - MCI

1 stop16h 39mMultiple Airlines

Deal found 10/27

$212

One-way flights from Kansas City to St. Louis
Search for one-way flight options from Kansas City to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 28, 2025.

Wed 1/286:10 amMCI - STL

Nonstop1h 15mSouthwest

Deal found 10/27

$49

Mon 1/264:55 pmMCI - STL

1 stop5h 00mSouthwest

Deal found 10/27

$59

Wed 12/2411:33 amMCI - STL

1 stop22h 07mFrontier

Deal found 10/26

$62

Thu 12/48:09 pmMCI - STL

1 stop14h 05mFrontier

Deal found 10/27

$65

Thu 12/118:09 pmMCI - STL

1 stop14h 05mFrontier

Deal found 10/27

$66

Wed 12/312:25 pmMCI - STL

Nonstop1h 05mSouthwest

Deal found 10/27

$69

Fri 12/52:48 pmMCI - STL

1 stop19h 26mFrontier

Deal found 10/26

$71

Thu 1/88:46 pmMCI - STL

1 stop13h 16mFrontier

Deal found 10/27

$72

Cheapflights Fare Finder

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

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Thu 12/4

12:00 pm-1:00 pm

Nonstop1h 00m

Lambert-St Louis

Mon 12/8

11:15 am-5:15 pm

2 stops6h 00m

$112

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 1/23

1:44 pm-10:33 pm

1 stop8h 49m

Lambert-St Louis

Sun 1/25

5:11 pm-12:39 pm

1 stop19h 28m

$170

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 11/14

8:28 pm-9:07 am

1 stop12h 39m

Lambert-St Louis

Sat 11/15

7:45 pm-7:33 pm

1 stop23h 48m

$181

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 11/17

8:28 pm-9:07 am

1 stop12h 39m

Lambert-St Louis

Tue 11/18

7:45 pm-5:19 pm

1 stop21h 34m

$185

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Tue 11/18

6:49 pm-9:07 am

1 stop14h 18m

Lambert-St Louis

Wed 11/19

7:24 pm-12:03 pm

1 stop16h 39m

$212

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 11/14

8:28 pm-9:07 am

1 stop12h 39m

Lambert-St Louis

Sun 11/16

7:45 pm-7:33 pm

1 stop23h 48m

$234

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 11/17

8:28 pm-9:07 am

1 stop12h 39m

Lambert-St Louis

Wed 11/19

7:45 pm-8:03 pm

2 stops24h 18m

$245

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Fri 11/14

8:28 pm-9:07 am

1 stop12h 39m

Lambert-St Louis

Thu 11/20

9:54 pm-7:33 pm

2 stops21h 39m

$286

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Mon 1/19

4:45 pm-5:50 pm

Nonstop1h 05m

$69

Kansas CitySt. Louis

MCI - STL

MCISTL

Kansas City

Thu 12/4

4:10 pm-5:15 pm

Nonstop1h 05m

$69

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 17 results

Compare providers for flights from Kansas City to St. Louis

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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Kansas City-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

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 in the evening, which can drop the price by up to 46% versus a flight in the morning.

The best insider tips for Kansas City to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Kansas City to St. Louis trip

Airports

MCI

MCI's central security checkpoint is efficient, rarely taking more than 5 minutes without TSA PreCheck.

STL

Use the MetroLink light rail for a convenient, economical ride from STL to downtown St. Louis in about 40 minutes.

Our travel experts

Matt Meltzer

Expert on MCI

Taryn White

Expert on STL

Reviews of airlines servicing St. Louis

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

4,236 reviews

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

4,236 reviews

Southwest

8.0

Very good

4,236 reviews

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

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 is 1 daily flight 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 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 1h. Southwest provides one of the quickest options available for as low as $112. 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 73% 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 $38. While the most popular route (Kansas City - Lambert-St Louis) can be booked for $137 on average, our data indicates $329 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

Edwardsville

O'Fallon

Fairview Heights

Maryland Heights

Collinsville

Eureka

Glencoe

St. Peters

Chesterfield

Alton

Farmington

Festus

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Kansas City to St. Louis

St. Louis to Kansas City flights

St. Louis to Quincy flights

St. Louis to Springfield flights

Columbia to St. Louis flights

Kansas City to Springfield flights

Springfield to Joplin flights

St. Louis to Joplin flights

St. Louis to Kirksville flights

Fort Leonard Wood to St. Louis flights

Complete your trip

St. Louis car rentals

Lambert-St Louis Airport car rentals

Springfield Capital Airport car rentals

Belleville Airport car rentals

Marion Williamson County Airport car rentals

Kansas City car rentals

Springfield car rentals

Joplin car rentals

Columbia car rentals

Fort Leonard Wood car rentals

Downtown car rentals

The Hill car rentals

Other flights to St. Louis

Top airline flying from Kansas City to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$97	Average$341	FlexibilityNo cancel fee	On-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.

$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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Kansas City to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Kansas City to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Kansas City to St. Louis

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 October 28, 2025.

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 October 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Kansas City to St. Louis that are best for you.

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 October.

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.

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?

What is the cheapest time of day to fly from MCI to STL?

The best insider tips for Kansas City to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your Kansas City to St. Louis trip

Airports

MCI

STL

Our travel experts

Reviews of airlines servicing St. Louis

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.

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?

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

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

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

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

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

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

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

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

Traveling to a place near St. Louis?

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.

Alternative routes for Kansas City to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Kansas City to St. Louis

100% Free

Book with Flexibility

Travel Smart

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 October 28, 2025.