Cheap Flights from St Louis to Kansas City International

Compare St Louis to Kansas City International flight deals

Find the cheapest month or even day of the year to fly to Kansas City International

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Flight deals from St Louis to Kansas City International

Looking for a cheap last-minute deal or the best return flight from St Louis to Kansas City International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Kansas City International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Kansas City International flights are currently cheapest in January.

Direct flights from St Louis to Kansas City International

St Louis to Kansas City International: Alternative routes

Compare routes from St Louis to Kansas City below. You may find an airport to fly into that's cheaper, faster, or easier than Kansas City International.

St Louis to Kansas City: Flight information

The things to know before you go.
Cheapest flight found$382
Cheapest month to flyJanuary
Average flight time1 hr, 8 mins
Most popular airlineSouthwest Airlines
Average flights per week26

Finding cheap flights from St Louis to Kansas City International: Frequently asked questions

The best price we found for a return flight from St Louis to Kansas City International is $382. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 8 minutes is the average flight time from St Louis to Kansas City International.
Southwest Airlines flies direct from St Louis to Kansas City International.
As of December 2025, there are 26 flights per week flying from St Louis to Kansas City International.
The cheapest month to fly from St Louis to Kansas City International is usually January.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Kansas City International Airport on Tuesday, 6 January 2026.
Yes – the average flight time is 1 hour and 8 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Kansas City International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Kansas City is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Southwest Airlines offers the cheapest flight tickets to Kansas City International.

Travelling from Lambert-St. Louis International Airport (STL) to Kansas City International Airport (MCI): what you need to know

  • Around 1 hour 5 minutes is how long you can expect to be travelling on a direct flight from Lambert-St. Louis International Airport to Kansas City International Airport.

  • Kansas City's timezone is UTC-5, which is the same as St Louis.

  • Take your pick of 16 weekly Lambert-St. Louis International Airport to Kansas City International Airport flights. The 09:40 departure with Southwest Airlines is the earliest flight you can take. Southwest Airlines operates the last service of the day at 22:50.

  • To ensure you get on your STL to MCI flight, leave plenty of time to check in and find your gate. Turning up two hours ahead of international departures and an hour before domestic flights is the standard rule.

  • Flying during a peak month like July? Major public holidays and other popular seasons can result in longer lines at airport checkpoints. Be extra cautious and arrive up to four hours before an international flight and two hours before domestic departures.

  • Southwest Airlines is your gateway to discovering Kansas City (and maybe even some other exciting parts of United States!). Browse the direct flights from Lambert-St. Louis International Airport to Kansas City International Airport offered by this carrier.

  • The airline with the highest passenger demand on this route is Southwest Airlines.

  • Southwest Airlines is the most punctual carrier that offers STL to MCI flights, with 78.05% of its services arriving as planned.

  • Think about adding a stopover when booking your ticket from Lambert-St. Louis International Airport to Kansas City International Airport. Simply uncheck 'Direct flights only' to break up your trip, or perhaps explore a new destination along the way. Check out these options between STL and MCI:

    • Chicago Midway International Airport

    • Nashville International Airport

    • Minneapolis-St. Paul International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Kansas City International Airport (MCI)

  • The cheapest price we've found for a one-way Lambert-St. Louis International Airport to Kansas City International Airport flight is $269. A round-trip ticket right now is $382. Depending on the availability when you book, these fares could change.

  • Book six months before you travel. After crunching the numbers on our calendar, this is how far you should book ahead to secure cheap tickets from STL to MCI.

  • Schedule your trip for May. That's the cheapest month for flights from Lambert-St. Louis International Airport to Kansas City International Airport. If you're flexible with your dates, try out the 'Whole month' tool to find the lowest price across each month.

  • There's no need to check every day to see if fares have gone down when you create a Price Alert. We'll let you know as soon as there's a new deal on cheap flights from STL to MCI.

  • Tailor your flights using filters. Choose your departure and arrival times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from Lambert-St. Louis International Airport to Kansas City International Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Kansas City International Airport (MCI)

Getting from Kansas City International Airport (MCI) to central Kansas City

  • MCI is located at 601 Brasilia Avenue.

  • From Kansas City International Airport, Kansas City is approximately 32 kilometres away. It takes around 20 minutes to get to the centre driving.

  • It'll take around 1 hour 10 minutes if you're travelling on public transport.

When to fly to Kansas City International Airport (MCI)

  • July is the most popular month for flights from Lambert-St. Louis International Airport to Kansas City International Airport. To escape the crowds, go to Kansas City in April.

  • The warmest month in Kansas City is July, with temperatures ranging between 18ºC and 34ºC. Book your flights from Lambert-St. Louis International Airport to Kansas City International Airport in this month if this is the kind of weather you like.

  • For cooler conditions, search for a cheap ticket from STL to MCI in January. Average temperatures are between -8ºC and 6ºC then.

Explore more of United States

  • Kansas City is easy to fall in love with, but there are so many other corners of United States you should also see. About 483 kilometres south-west of Kansas City, a visit to Oklahoma City will keep you on the go. Start with popular sights like Bricktown, Oklahoma City Zoo and Lake Hefner Golf Course.

  • Around 274 kilometres north-west of Kansas City, Omaha is another favourite stop in United States. Experience the best of this destination with a visit to Old Market, Bob Kerrey Pedestrian Bridge and Heartland of America Park.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.