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

Popular airlines from Kansas City International Airport (MCI) to St. Louis, MO (SUS-Spirit of St. Louis)

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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 $352
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $352

Frequently asked questions

How much does a flight from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS) cost?
Snag a cheap one-way flight or cheap return flight from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS) 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 Spirit of St. Louis Airport (SUS)?
The cheapest month to fly from MCI to SUS is , when there's less demand. Off-peak season is often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS)?
To find the cheapest airline flying from MCI to SUS, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS)?
You'll have to book a flight with a layover if you're traveling from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from MCI to SUS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS)?
To avoid potential delays on the Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS) route, aim to fly before 3 PM. Later flights have a 22% higher chance of cancellation.**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)?
Explore your flight options from Kansas City Intl. Airport (MCI) to Lambert-St. Louis Intl. Airport (STL). This is the only airport in St. Louis you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS) last-minute?
Booking your ticket from MCI to SUS just before your getaway is typically more expensive. However, if there's some wiggle room with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a MCI to SUS flight and hotel package?
You'll generally save money by securing a MCI to SUS flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal flights and accommodations, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Kansas City Intl. Airport (MCI) to Spirit of St. Louis Airport (SUS)?
If you booked your MCI to SUS flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

Travel information

Origin airport
Kansas City Intl.
Destination airport
Spirit of St. Louis
Distance
222 mi

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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 . 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 2026. You can also book with separate airlines for your outbound and return journeys, from 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.

 

Kansas City to St. Louis Flights

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