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Not ready to book? to track prices.Find the cheapest flights from Kansas City to St. Louis
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Spirit Airlines flights from Kansas City to St. Louis
Our best Spirit Airlines deals on Kansas City to St. Louis flight tickets
Southwest flights from Kansas City to St. Louis
Our best Southwest deals on Kansas City to St. Louis flight tickets
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 cheapest month to fly to St. Louis?
In general, March 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 $152. The month of January is another great option to travel to St. Louis, with average flight prices from Kansas City averaging around $208.
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 Tuesday when prices can be found for as low as $384. 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 Saturday because tickets tend to average around $431. 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 $364 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 $414 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 Lambert-St Louis flights?
There are 1 cabin classes available to choose from on Kansas City to Lambert-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?
You could potentially save up to 62% on your flight if you consider stops on a Kansas City to St. Louis flight.
How many flights depart from Kansas City to St. Louis on average per day?
As of June 2025, there are 2 flights per day flying from Kansas City to St. Louis. The most common time of day flights depart is 5:00AM, with 30% of flights taking off in the morning.
How many flights depart from Kansas City to St. Louis on average per week?
The number of flights available between Kansas City and St. Louis is 17 per week as of June 2025. The most frequent departure day is Tue, with 24% of weekly flights leaving on this day.
When to book flights from Kansas City to St. Louis
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
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?
The number of operators available for flights from Kansas City Airport to Lambert-St Louis Airport is 1 as of June 2025.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Kansas City to St. Louis is Boeing 737-800 Passenger/BBJ2 (winglets) (17.90% of total bookings). The next most popular plane models are Boeing 737-700 Passenger/BBJ1 (winglets) (17.59%), Embraer 175 (16.05%), and Boeing 737 MAX 8 (8.64%).
What is the most popular airline from Kansas City to St. Louis?
Based on momondo bookings for flights between Kansas City and St. Louis, the leading airline is Southwest, making up 100% of the total bookings.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $97 | Free Cancellation | Rating 8.0 4,287 reviews |
Southwest Flights From Kansas City to St. Louis
Across 17 Southwest flights from Kansas City to St. Louis this week, the average price was $353, with the best Southwest deals starting from $97 round-trip. 4,287 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 locationsWhy 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.