$59 Cheap Flights from Kansas City (MCI) to St. Louis (STL)

View $59 flight on Wed, Feb 25, 2026Opens in a new window

Popular airlines from Kansas City International Airport (MCI) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Kansas City to St. Louis (MCI-STL)

Prices were available within the past 7 days and start at $59 for one-way flights and $107 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Feb 25 - Thu, Feb 26
MCI
Kansas City
STL
St. Louis
$107 Roundtrip, found 2 days ago
$107
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Feb 25 from Kansas City to St. Louis, returning Thu, Feb 26, priced at $107 found 2 days ago
Southwest Airlines
Wed, Feb 25 - Thu, Feb 26
MCI
Kansas City
STL
St. Louis
$112 Roundtrip, found 2 days ago
$112
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Feb 25 from Kansas City to St. Louis, returning Thu, Feb 26, priced at $112 found 2 days ago
Southwest Airlines
Wed, Feb 25 - Thu, Feb 26
MCI
Kansas City
STL
St. Louis
$117 Roundtrip, found 2 days ago
$117
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Feb 25 from Kansas City to St. Louis, returning Thu, Feb 26, priced at $117 found 2 days ago
Frontier Airlines
Mon, Nov 17 - Sat, Dec 6
MCI
Kansas City
STL
St. Louis
$120 Roundtrip, found 3 days ago
$120
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Nov 17 from Kansas City to St. Louis, returning Sat, Dec 6, priced at $120 found 3 days ago
Southwest Airlines
Wed, Feb 25 - Thu, Feb 26
MCI
Kansas City
STL
St. Louis
$122 Roundtrip, found 2 days ago
$122
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Feb 25 from Kansas City to St. Louis, returning Thu, Feb 26, priced at $122 found 2 days ago
Southwest Airlines
Wed, Feb 25 - Thu, Feb 26
MCI
Kansas City
STL
St. Louis
$134 Roundtrip, found 2 days ago
$134
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Wed, Feb 25 from Kansas City to St. Louis, returning Thu, Feb 26, priced at $134 found 2 days ago
Frontier Airlines
Mon, Nov 17 - Wed, Dec 3
MCI
Kansas City
STL
St. Louis
$140 Roundtrip, found 3 days ago
$140
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Nov 17 from Kansas City to St. Louis, returning Wed, Dec 3, priced at $140 found 3 days ago
American Airlines
Tue, Dec 9 - Fri, Dec 12
MCI
Kansas City
STL
St. Louis
$331 Roundtrip, found 2 hours ago
$331
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, Dec 9 from Kansas City to St. Louis, returning Fri, Dec 12, priced at $331 found 2 hours ago
Hawaiian Airlines
Mon, Dec 15 - Sat, Jan 3
MCI
Kansas City
STL
St. Louis
$528 Roundtrip, found 16 hours ago
$528
Roundtrip
found 16 hours ago
Select Hawaiian Airlines flight, departing Mon, Dec 15 from Kansas City to St. Louis, returning Sat, Jan 3, priced at $528 found 16 hours ago
United
Thu, Dec 25 - Sun, Dec 28
MCI
Kansas City
STL
St. Louis
$657 Roundtrip, found 2 days ago
$657
Roundtrip
found 2 days ago
Select United flight, departing Thu, Dec 25 from Kansas City to St. Louis, returning Sun, Dec 28, priced at $657 found 2 days ago

Find the cheapest month to fly from Kansas City (MCI) to St. Louis (STL)

September is typically the cheapest month to fly

From $77 - $602 per traveler.

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $153
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $153
Flights from Kansas City (MCI) to St. Louis (STL)
Origin airport
Kansas City Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$97
Distance
236 mi
Average flight time
2 hours 37 mins

Kansas City to St. Louis Flights

The cheapest times to fly from Kansas City to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Kansas City to St. Louis are during the month of February. You can find some of the cheapest flights from Kansas City to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kansas City to St. Louis

Sunday is one of the best days to book for cheap flights from Kansas City to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Kansas City to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Kansas City to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $59 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Kansas City to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Kansas City to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $59 or cheap return flight from $107 from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from MCI to STL is February, when demand is low. Off-peak season is typically when airlines offer better prices between these airports.
Which airlines fly direct from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
Board a direct flight with Southwest Airlines and travel straight from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL).
What is the cheapest airline that flies from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from MCI to STL. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
With an average of 2 direct flights that operate from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL) daily, you'll be on your way in no time.
What are the most popular departure times for flights from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
The 7 AM departures from MCI to STL are the top choice for many travelers. Greater demand means you'll likely pay more for these departures. If you're looking to save, choose a less crowded time to fly.
What day of the week has the most flights from MCI to STL?
Sunday offers the most flights from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL). Consider leaving on this day and you'll have a greater chance of finding a departure that fits your itinerary.
What is the earliest flight from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
The earliest flight departing from Kansas City Intl. Airport (MCI) is at around 6:20AM UTC-6. Board this flight and you'll touch down at Lambert-St. Louis Intl. Airport (STL) at approximately 7:30AM UTC-6. The entire trip takes 1h 10m.
How long does it take to fly from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
It takes approximately 1 hour and 7 minutes to fly the 240 mi from MCI to STL.
What airline has the least delays from MCI to STL?
Consider traveling with Southwest Airlines if you'd like to go straight from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL) without any interruptions. This carrier has the best track record for punctuality, with an on-time performance of 89%. Want to be updated if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Departures after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for St. Louis from Kansas City Intl. Airport (MCI)?
Lambert-St. Louis Intl. Airport (STL) is the only airport in St. Louis with direct flights from Kansas City Intl. Airport (MCI). Compare the available options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from MCI to STL shortly before your journey is usually more expensive. But if you're flexible with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a MCI to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a MCI to STL flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place takes the hassle out of travel planning. Simply pick your flights and select from our wide range of stays, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL)?
In most cases, you're able to reschedule or cancel your MCI to STL flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more information, go to our Customer Service portal.

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*Available to One Key members.