Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Kansas City to St. Louis from $111

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.
Frontier Logo
10:30 pm - 11:17 amMCI  Kansas City-STL Lambert-St Louis
12h 47m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:17 pm - 9:45 pmSTL  Lambert-St Louis-MCI Kansas City
9h 28m1 stop Las Vegas Harry Reid Intl
$230Frontier
Sun, Sep 27 - Mon, Sep 28
Frontier Logo
10:30 pm - 11:17 amMCI  Kansas City-STL Lambert-St Louis
12h 47m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:17 pm - 9:45 pmSTL  Lambert-St Louis-MCI Kansas City
9h 28m1 stop Las Vegas Harry Reid Intl
$240Frontier
Thu, Sep 24 - Mon, Sep 28
Frontier Logo
10:30 pm - 11:32 amMCI  Kansas City-STL Lambert-St Louis
13h 02m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:00 pm - 7:48 pmSTL  Lambert-St Louis-MCI Kansas City
23h 48m1 stop Denver Intl
$244Frontier
Mon, Oct 5 - Fri, Oct 9
Frontier Logo
8:32 pm - 7:17 pmMCI  Kansas City-STL Lambert-St Louis
22h 45m1 stop Denver Intl
Frontier Logo
12:17 pm - 9:45 pmSTL  Lambert-St Louis-MCI Kansas City
9h 28m1 stop Las Vegas Harry Reid Intl
$250Frontier
Fri, Sep 25 - Mon, Sep 28
Frontier Logo
8:32 pm - 7:17 pmMCI  Kansas City-STL Lambert-St Louis
22h 45m1 stop Denver Intl
Frontier Logo
12:27 pm - 9:45 pmSTL  Lambert-St Louis-MCI Kansas City
9h 18m1 stop Las Vegas Harry Reid Intl
$250Frontier
Fri, Sep 25 - Sun, Sep 27
Frontier Logo
8:32 pm - 7:17 pmMCI  Kansas City-STL Lambert-St Louis
22h 45m1 stop Denver Intl
Frontier Logo
8:10 pm - 7:37 pmSTL  Lambert-St Louis-MCI Kansas City
23h 27m1 stop Denver Intl
$258Frontier
Thu, Oct 1 - Mon, Oct 5
Frontier Logo
10:30 pm - 11:17 amMCI  Kansas City-STL Lambert-St Louis
12h 47m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:27 pm - 9:45 pmSTL  Lambert-St Louis-MCI Kansas City
9h 18m1 stop Las Vegas Harry Reid Intl
$260Frontier
Thu, Sep 24 - Sun, Sep 27
Frontier Logo
10:30 pm - 11:17 amMCI  Kansas City-STL Lambert-St Louis
12h 47m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:17 pm - 9:45 pmSTL  Lambert-St Louis-MCI Kansas City
9h 28m1 stop Las Vegas Harry Reid Intl
$260Frontier
Thu, Sep 24 - Mon, Sep 28
Southwest Logo
1:50 pm - 2:55 pmMCI  Kansas City-STL Lambert-St Louis
1h 05mnonstop
Southwest Logo
9:50 pm - 11:00 pmSTL  Lambert-St Louis-MCI Kansas City
1h 10mnonstop
$277Southwest
Thu, Oct 1 - Mon, Oct 5
Southwest Logo
6:00 pm - 7:05 pmMCI  Kansas City-STL Lambert-St Louis
1h 05mnonstop
Southwest Logo
9:50 pm - 11:00 pmSTL  Lambert-St Louis-MCI Kansas City
1h 10mnonstop
$277Southwest
Mon, Oct 19 - Thu, Oct 22

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Frontier flights from Kansas City to St. Louis

Our best Frontier deals on Kansas City to St. Louis flight tickets
Frontier
Sep 24
MCI10:30 pmKansas City
12h 47m
1 stop
STL11:17 amLambert-St Louis
Sep 28
STL12:17 pmLambert-St Louis
9h 28m
1 stop
MCI9:45 pmKansas City
$240
Frontier
Oct 5
MCI10:30 pmKansas City
13h 02m
1 stop
STL11:32 amLambert-St Louis
Oct 9
STL8:00 pmLambert-St Louis
23h 48m
1 stop
MCI7:48 pmKansas City
$244
Frontier
Sep 25
MCI8:32 pmKansas City
22h 45m
1 stop
STL7:17 pmLambert-St Louis
Sep 28
STL12:17 pmLambert-St Louis
9h 28m
1 stop
MCI9:45 pmKansas City
$250

United Airlines flights from Kansas City to St. Louis

Our best United Airlines deals on Kansas City to St. Louis flight tickets
United Airlines
Oct 5
MCI5:06 pmKansas City
4h 15m
1 stop
STL9:21 pmLambert-St Louis
Oct 8
STL6:00 amLambert-St Louis
4h 26m
1 stop
MCI10:26 amKansas City
$297
United Airlines
Oct 1
MCI6:29 amKansas City
9h 31m
1 stop
STL4:00 pmLambert-St Louis
Oct 5
STL4:39 pmLambert-St Louis
7h 05m
1 stop
MCI11:44 pmKansas City
$367
United Airlines
Sep 23
MCI1:10 pmKansas City
6h 06m
1 stop
STL7:16 pmLambert-St Louis
Sep 26
STL8:00 amLambert-St Louis
6h 18m
1 stop
MCI2:18 pmKansas City
$573

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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Sun 9/27

10:30 pm-11:17 am

1 stop12h 47m

Lambert-St Louis

Mon 9/28

12:17 pm-9:45 pm

1 stop9h 28m

$230

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 9/24

10:30 pm-11:17 am

1 stop12h 47m

Lambert-St Louis

Mon 9/28

12:17 pm-9:45 pm

1 stop9h 28m

$240

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Mon 10/5

10:30 pm-11:32 am

1 stop13h 02m

Lambert-St Louis

Fri 10/9

8:00 pm-7:48 pm

1 stop23h 48m

$244

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Fri 9/25

8:32 pm-7:17 pm

1 stop22h 45m

Lambert-St Louis

Mon 9/28

12:17 pm-9:45 pm

1 stop9h 28m

$250

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Fri 9/25

8:32 pm-7:17 pm

1 stop22h 45m

Lambert-St Louis

Sun 9/27

12:27 pm-9:45 pm

1 stop9h 18m

$250

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 10/1

8:32 pm-7:17 pm

1 stop22h 45m

Lambert-St Louis

Mon 10/5

8:10 pm-7:37 pm

1 stop23h 27m

$258

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 9/24

10:30 pm-11:17 am

1 stop12h 47m

Lambert-St Louis

Sun 9/27

12:27 pm-9:45 pm

1 stop9h 18m

$260

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 9/24

10:30 pm-11:17 am

1 stop12h 47m

Lambert-St Louis

Mon 9/28

12:17 pm-9:45 pm

1 stop9h 28m

$260
Quickest round-trip

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Thu 10/1

1:50 pm-2:55 pm

Nonstop1h 05m

Lambert-St Louis

Mon 10/5

9:50 pm-11:00 pm

Nonstop1h 10m

$277

Kansas CitySt. Louis

MCI Kansas City - STL Lambert-St Louis

MCISTL

Kansas City

Mon 10/19

6:00 pm-7:05 pm

Nonstop1h 05m

Lambert-St Louis

Thu 10/22

9:50 pm-11:00 pm

Nonstop1h 10m

$277

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $433 to $603.
The lowest price recently found on this route was $230.

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 $271. The month of November is another great option to travel to St. Louis, with average flight prices from Kansas City averaging around $325.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $422. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $468. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Kansas City at noon is the least expensive time of day to depart. momondo users have found prices as low as $423 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $454 per ticket.

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?

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

$111

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 $111. The best round-trip flight deal from Kansas City to St. Louis found on momondo in the last 72 hours is $230.
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 $171Free CancellationRating
8.0
4,195 reviews
Search Southwest flights

  • Southwest Flights From Kansas City to St. Louis

    Across 15 Southwest flights from Kansas City to St. Louis this week, the average price was $525, with the best Southwest deals starting from $171 round-trip. 4,195 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
Florissant
Hermann
O'Fallon
Clayton
Farmington
Fenton
Festus
Wentzville
Edwardsville
Eureka
Litchfield
Grafton
Waterloo

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 10/10
Sat 10/17
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States