Route guide · 236 miles
Cheap Flights from St. Louis to Kansas City
STL → MCI · Nonstop 0h 59m · Live round-trip fares
Looking for cheap flights from St. Louis to Kansas City? You're in the right place. Airfare Deal tracks live fares on this 236-mile route around the clock. As a rule of thumb, booking 2–4 weeks ahead lands the best prices — and a free fare alert means you never have to keep refreshing the page.
Live fares for STL → MCI are updating. Use the search below for real-time prices.
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See live fares
Updated daily
Flight time
0h 59m
Nonstop, typical
Distance
236 mi
STL → MCI
Book ahead
2–4 weeks
Best window, typically
Nonstop airlines
1
Southwest Airlines
Nonstop flights from St. Louis to Kansas City
Nonstop flights from St. Louis to Kansas City are flown by Southwest Airlines. The 236-mile trip takes about 0h 59m gate to gate, and nonstops are usually cheapest when booked 2–4 weeks ahead.
Booking insights: St. Louis → Kansas City
- Distance: 236 miles · nonstop flight time: 0h 59m.
- Cheapest upcoming week in the live data starts around Oct 29, with fares from $299.
- Fares tend to bottom out when you book about 2–4 weeks ahead — earlier than that rarely helps, later usually hurts.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- A free fare alert beats daily checking: we watch this route and ping you when prices drop.
Price trend
Cheapest departure weeks ahead
Departing around Oct 29 is currently the cheapest window — about $77 less than the nearest weeks. Based on recent fares found for this route; prices change quickly.
Cheapest month · St. Louis → Kansas City
October 2026
Every date's recent round-trip fare, at a glance.
Fares from
$299
Cheapest: Thu, Oct 29 — $299 · Priciest: Oct 22 — $376
Get this fare →Recent fares found for specific dates in October 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
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Flying from St. Louis to Kansas City: what you need to know
The flight
At 236 miles, STL to MCI is one of those quick up-and-down flights: roughly 0h 59m nonstop. There's no meal service to plan around — the decisions that matter here are departure time and which airport entrance traffic is kinder to you.
Airlines on this route
Southwest Airlines flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from St. Louis (STL)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our St. Louis airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Kansas City (MCI)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Kansas City airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Kansas City to St. Louis fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 236 miles, booking 2–4 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Morning flights are delayed less often than evening ones — earlier departures have the best on-time record.
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
St. Louis to Kansas City flight FAQs
How long is the flight from STL to MCI?
Nonstop flights from St. Louis to Kansas City take about 0h 59m and cover roughly 236 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from St. Louis to Kansas City?
Southwest Airlines typically operate nonstop flights from STL to MCI. Nonstops are usually cheapest when booked 2–4 weeks ahead of departure.
What is the cheapest month to fly from St. Louis to Kansas City?
There's no single magic month, but prices on this route generally soften in the shoulder season, when demand dips after the holidays and again in early fall. A free fare alert is the easiest way to catch those windows.
How much are last minute flights from STL to MCI?
Last-minute flights from STL to MCI (booked within 7 days of departure) typically cost noticeably more than fares booked 2–4 weeks out. Booking early is the smarter move.
What is a good round-trip deal from St. Louis to Kansas City?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from St. Louis to Kansas City?
You'll mainly see Southwest Airlines on St. Louis to Kansas City. Checking each against the live fares below is the surest way to find the lowest price for your dates.
How early should I get to St. Louis airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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