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Cheap flights from Kansas City to St. Louis from $116

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Kansas City to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
4:20 pm - 5:20 pmMCI  Kansas City-STL Lambert-St Louis
1h 00mnonstop
Southwest Logo
8:15 pm - 9:30 pmSTL  Lambert-St Louis-MCI Kansas City
1h 15mnonstop
$117Southwest
Thu, Dec 3 - Mon, Dec 7
Southwest Logo
4:20 pm - 5:20 pmMCI  Kansas City-STL Lambert-St Louis
1h 00mnonstop
Southwest Logo
8:15 pm - 9:30 pmSTL  Lambert-St Louis-MCI Kansas City
1h 15mnonstop
$117Southwest
Thu, Dec 3 - Tue, Dec 8
Southwest Logo
8:15 am - 9:25 amMCI  Kansas City-STL Lambert-St Louis
1h 10mnonstop
Southwest Logo
8:15 pm - 9:30 pmSTL  Lambert-St Louis-MCI Kansas City
1h 15mnonstop
$117Southwest
Wed, Dec 30 - Tue, Jan 5
Frontier Logo
8:29 pm - 10:57 amMCI  Kansas City-STL Lambert-St Louis
14h 28m1 stop Denver Intl
Frontier Logo
7:54 pm - 7:35 pmSTL  Lambert-St Louis-MCI Kansas City
23h 41m1 stop Denver Intl
$118Frontier
Thu, Dec 3 - Mon, Dec 7
Southwest Logo
5:10 am - 11:05 amMCI  Kansas City-STL Lambert-St Louis
5h 55m1 stop Chicago Midway
Southwest Logo
8:25 am - 9:35 amSTL  Lambert-St Louis-MCI Kansas City
1h 10mnonstop
$127Southwest
Fri, Dec 18 - Mon, Dec 21
Southwest Logo
5:10 am - 11:05 amMCI  Kansas City-STL Lambert-St Louis
5h 55m1 stop Chicago Midway
Southwest Logo
3:30 pm - 9:40 pmSTL  Lambert-St Louis-MCI Kansas City
6h 10m1 stop Orlando
$137Southwest
Fri, Dec 18 - Mon, Dec 21
Southwest Logo
8:15 am - 9:25 amMCI  Kansas City-STL Lambert-St Louis
1h 10mnonstop
Southwest Logo
1:35 pm - 2:40 pmSTL  Lambert-St Louis-MCI Kansas City
1h 05mnonstop
$191Southwest
Fri, Dec 18 - Mon, Dec 21
Southwest Logo
4:20 pm - 5:20 pmMCI  Kansas City-STL Lambert-St Louis
1h 00mnonstop
Southwest Logo
5:55 am - 12:25 pmSTL  Lambert-St Louis-MCI Kansas City
6h 30m1 stop Phoenix Sky Harbor Intl
$201Southwest
Thu, Dec 3 - Mon, Dec 7
Southwest Logo
4:20 pm - 5:20 pmMCI  Kansas City-STL Lambert-St Louis
1h 00mnonstop
Southwest Logo
4:15 pm - 10:10 pmSTL  Lambert-St Louis-MCI Kansas City
5h 55m1 stop Dallas Love Field
$201Southwest
Thu, Dec 3 - Tue, Dec 8
Frontier Logo
10:30 am - 12:12 amMCI  Kansas City-STL Lambert-St Louis
13h 42m1 stop Orlando
Frontier Logo
6:20 pm - 9:35 amSTL  Lambert-St Louis-MCI Kansas City
15h 15m1 stop Orlando
$206Frontier
Fri, Dec 4 - Sun, Dec 13

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Frontier flights from Kansas City to St. Louis

Our best Frontier deals on Kansas City to St. Louis flight tickets
Frontier
Dec 3
MCI8:29 pmKansas City
14h 28m
1 stop
STL10:57 amLambert-St Louis
Dec 7
STL7:54 pmLambert-St Louis
23h 41m
1 stop
MCI7:35 pmKansas City
$118
Frontier
Dec 4
MCI10:30 amKansas City
13h 42m
1 stop
STL12:12 amLambert-St Louis
Dec 13
STL6:20 pmLambert-St Louis
15h 15m
1 stop
MCI9:35 amKansas City
$206
Frontier
Dec 4
MCI8:29 pmKansas City
14h 28m
1 stop
STL10:57 amLambert-St Louis
Dec 11
STL7:54 pmLambert-St Louis
23h 41m
1 stop
MCI7:35 pmKansas City
$222

Southwest flights from Kansas City to St. Louis

Our best Southwest deals on Kansas City to St. Louis flight tickets
Southwest
Dec 3
MCI4:20 pmKansas City
1h 00m
STL5:20 pmLambert-St Louis
Dec 8
STL8:15 pmLambert-St Louis
1h 15m
MCI9:30 pmKansas City
$117
Southwest
Dec 18
MCI5:10 amKansas City
5h 55m
1 stop
STL11:05 amLambert-St Louis
Dec 21
STL8:25 amLambert-St Louis
1h 10m
MCI9:35 amKansas City
$127
Southwest
Dec 18
MCI5:10 amKansas City
5h 55m
1 stop
STL11:05 amLambert-St Louis
Dec 21
STL3:30 pmLambert-St Louis
6h 10m
1 stop
MCI9:40 pmKansas City
$137

momondo Fare Finder

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

Fly from

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Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 12/3

4:20 pm-5:20 pm

Nonstop1h 00m

Lambert-St Louis

Mon 12/7

8:15 pm-9:30 pm

Nonstop1h 15m

$117

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 12/3

4:20 pm-5:20 pm

Nonstop1h 00m

Lambert-St Louis

Tue 12/8

8:15 pm-9:30 pm

Nonstop1h 15m

$117

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Wed 12/30

8:15 am-9:25 am

Nonstop1h 10m

Lambert-St Louis

Tue 1/5

8:15 pm-9:30 pm

Nonstop1h 15m

$117

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 12/3

8:29 pm-10:57 am

1 stop14h 28m

Lambert-St Louis

Mon 12/7

7:54 pm-7:35 pm

1 stop23h 41m

$118

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Fri 12/18

5:10 am-11:05 am

1 stop5h 55m

Lambert-St Louis

Mon 12/21

8:25 am-9:35 am

Nonstop1h 10m

$127

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Fri 12/18

5:10 am-11:05 am

1 stop5h 55m

Lambert-St Louis

Mon 12/21

3:30 pm-9:40 pm

1 stop6h 10m

$137

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Fri 12/18

8:15 am-9:25 am

Nonstop1h 10m

Lambert-St Louis

Mon 12/21

1:35 pm-2:40 pm

Nonstop1h 05m

$191

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 12/3

4:20 pm-5:20 pm

Nonstop1h 00m

Lambert-St Louis

Mon 12/7

5:55 am-12:25 pm

1 stop6h 30m

$201

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 12/3

4:20 pm-5:20 pm

Nonstop1h 00m

Lambert-St Louis

Tue 12/8

4:15 pm-10:10 pm

1 stop5h 55m

$201

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Fri 12/4

10:30 am-12:12 am

1 stop13h 42m

Lambert-St Louis

Sun 12/13

6:20 pm-9:35 am

1 stop15h 15m

$206

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Kansas City to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Kansas City and St. Louis?

Prices are currently low for flights on this route.

Typical prices usually range from $213 to $371.
The lowest price recently found on this route was $117.

What is the cheapest month to fly to St. Louis?

In general, December is the cheapest month to fly from Kansas City to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $191. The month of November is another great option to travel to St. Louis, with average flight prices from Kansas City averaging around $276.

What is the cheapest Kansas City to Lambert-St Louis flight route?

Fly from Kansas City to Lambert-St Louis for the best Kansas City - Lambert-St Louis flight prices

What cabin class options are available on Kansas City to St. Louis flights?

There is only 1 cabin class available to choose from on Kansas City to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Kansas City to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Kansas City to St. Louis.

How have Kansas City to St. Louis flight prices changed over time?

As of November 2026, prices for Kansas City to St. Louis flights are approximately 24% more expensive when compared to flights at the same time last year.

When to book flights from Kansas City to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Kansas City to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Kansas City to St. Louis (MCI to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Kansas City to St. Louis

Best Price Found

$116

Fastest flight time

1h 00m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Kansas City in the past 72 hours is $116. The best round-trip flight deal from Kansas City to St. Louis found on momondo in the last 72 hours is $117.
The fastest flight from Kansas City to St. Louis takes 1h 00m
Direct flights go from Kansas City to St. Louis every day.
There is 1 airport in St. Louis. From Kansas City there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Kansas City to St. Louis

  • How far is Kansas City to Lambert-St Louis by plane?

    The straight-line distance from Kansas City to Lambert-St Louis is 237.1 mi. 1h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Kansas City Airport to Lambert-St Louis Airport?

    Prices for flights from Kansas City Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Kansas City Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Kansas City Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Kansas City Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Kansas City to St. Louis?

  • What is the most popular airline from Kansas City to St. Louis?

Best airlines flying from Kansas City to St. Louis

Compare and see reviews for airlines that fly from Kansas City to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $187Free CancellationRating
8.0
4,219 reviews
Search Southwest flights

  • Southwest Flights From Kansas City to St. Louis

    Across 14 Southwest flights from Kansas City to St. Louis this week, the average price was $542, with the best Southwest deals starting from $187 round-trip. 4,219 users have rated Southwest on momondo, with an average score of 8.0/10.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Maryland Heights
St. Peters
Alton
Collinsville
Farmington
Florissant
Festus
Clayton
Hermann
Fenton
Edwardsville
O'Fallon
Eureka
Wentzville
Litchfield
Waterloo
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Kansas City to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Kansas City to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Kansas City to St. Louis with flexible booking policies on momondo?

Flights from Kansas City to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Kansas City to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Kansas City.

I’m not ready to book a flight from Kansas City to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Kansas City and alert you when they change.

An easier way to manage your St. Louis trip

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