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

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

Prices were available within the past 7 days and start at $61 for one-way flights and $120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Dec 6 - Thu, Dec 11
STL
St. Louis
MCI
Kansas City
$120 Roundtrip, found 6 hours ago
$120
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Sat, Dec 6 from St. Louis to Kansas City, returning Thu, Dec 11, priced at $120 found 6 hours ago
Frontier Airlines
Wed, Nov 12 - Mon, Nov 17
STL
St. Louis
MCI
Kansas City
$122 Roundtrip, found 17 hours ago
$122
Roundtrip
found 17 hours ago
Select Frontier Airlines flight, departing Wed, Nov 12 from St. Louis to Kansas City, returning Mon, Nov 17, priced at $122 found 17 hours ago
Southwest Airlines
Mon, Dec 8 - Wed, Dec 10
STL
St. Louis
MCI
Kansas City
$137 Roundtrip, found 4 days ago
$137
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Dec 8 from St. Louis to Kansas City, returning Wed, Dec 10, priced at $137 found 4 days ago
Frontier Airlines
Wed, Dec 3 - Thu, Dec 11
STL
St. Louis
MCI
Kansas City
$140 Roundtrip, found 6 hours ago
$140
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Wed, Dec 3 from St. Louis to Kansas City, returning Thu, Dec 11, priced at $140 found 6 hours ago
Frontier Airlines
Sat, Dec 6 - Sun, Dec 14
STL
St. Louis
MCI
Kansas City
$153 Roundtrip, found 6 hours ago
$153
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Sat, Dec 6 from St. Louis to Kansas City, returning Sun, Dec 14, priced at $153 found 6 hours ago
Southwest Airlines
Mon, Nov 17 - Tue, Nov 18
STL
St. Louis
MCI
Kansas City
$157 Roundtrip, found 4 days ago
$157
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Nov 17 from St. Louis to Kansas City, returning Tue, Nov 18, priced at $157 found 4 days ago
Frontier Airlines
Wed, Nov 12 - Mon, Nov 17
STL
St. Louis
MCI
Kansas City
$160 Roundtrip, found 17 hours ago
$160
Roundtrip
found 17 hours ago
Select Frontier Airlines flight, departing Wed, Nov 12 from St. Louis to Kansas City, returning Mon, Nov 17, priced at $160 found 17 hours ago
American Airlines
Wed, Dec 3 - Thu, Dec 11
STL
St. Louis
MCI
Kansas City
$169 Roundtrip, found 4 days ago
$169
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Dec 3 from St. Louis to Kansas City, returning Thu, Dec 11, priced at $169 found 4 days ago
United
Tue, Dec 9 - Wed, Dec 24
STL
St. Louis
MCI
Kansas City
$336 Roundtrip, found 5 days ago
$336
Roundtrip
found 5 days ago
Select United flight, departing Tue, Dec 9 from St. Louis to Kansas City, returning Wed, Dec 24, priced at $336 found 5 days ago
Delta
Wed, Dec 3 - Thu, Dec 11
STL
St. Louis
MCI
Kansas City
$439 Roundtrip, found 4 days ago
$439
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Dec 3 from St. Louis to Kansas City, returning Thu, Dec 11, priced at $439 found 4 days ago

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

September is typically the cheapest month to fly

From $77 - $658 per traveler.

Alternative airports near Kansas City

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

Select flight to Kansas City Intl. MCI. Cheapest option available. Average driving time to city center is 23 minutes. Flights from $160
MCI
Kansas City Intl.
Cheapest
Average driving time to city center23 min
Flights from $160

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI) cost?
Secure a cheap one-way flight from $61 or cheap return flight from $120 from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI) 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 Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
The cheapest month to fly from STL to MCI is December, when there's less demand. Off-peak months are generally when you'll find cheap fares for travel between these airports.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
Catch a nonstop flight with Southwest Airlines and head straight from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI).
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
To find the cheapest airline that'll fly you from STL to MCI, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
With an average of 2 nonstop flights departing from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI) daily, you'll be taking off on vacation soon enough.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
The 11 AM departures from STL to MCI are the top choice for many travelers. They can also be more expensive. If you're hoping to save money, book during off-peak hours.
What day of the week has the most flights from STL to MCI?
Jet off on a Friday if you're looking for the biggest selection of flights from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
Lambert-St. Louis Intl. Airport (STL)'s earliest flight to Kansas City Intl. Airport (MCI) departs at approximately 9:10AM UTC-6. With a total journey time of 1h 10m, you'll arrive at around 10:20AM UTC-6.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
Flights from STL to MCI have an average travel time of 1 hour and 10 minutes. The distance between the two is 240 mi.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 22% more likely to be 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 Kansas City from Lambert-St. Louis Intl. Airport (STL)?
Kansas City Intl. Airport (MCI) is the only airport in Kansas City with direct flights from Lambert-St. Louis Intl. Airport (STL). Check out the available options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI) last-minute?
Holding off until just before your trip to book your flight from STL to MCI generally means paying more. Although you may find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to boost your chances of scoring a bargain.
Is it cheaper to book a STL to MCI flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to MCI flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place takes the hassle out of travel planning. Simply pick your flights and choose from our extensive range of hotels, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Kansas City Intl. Airport (MCI)?
In most cases, you can cancel or modify your STL to MCI flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want further details, head to our Customer Service portal.

Book with confidence

St. Louis to Kansas City Flights

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

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 St. Louis to Kansas City are during the month of December. You can find some of the cheapest flights from St. Louis to Kansas City with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Kansas City: 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 St. Louis to Kansas City

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 St. Louis to Kansas City in 2025. You can also book with separate airlines for your outbound and return journeys, from $61 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 St. Louis to Kansas City 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 St. Louis to Kansas City 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.

 

St. Louis to Kansas City Flights

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*Available to One Key members.