$111 Find Cheap Flights from Kansas City to St. Louis - Compare and Save

Among airlines operating Kansas City to St. Louis flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Southwest operates flights between Kansas City and St. Louis.

Flights from Kansas City to St. Louis usually depart from Kansas City (MCI) and arrive at Lambert-St Louis (STL).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Only Economy Class is available on flights from Kansas City to St. Louis.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $472 round-trip via Chicago O'Hare Intl (ORD), compared to $536 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

Connecting flights from Kansas City to St. Louis most commonly pass through:

• Chicago O'Hare Intl (ORD) - 83% of one-stop connections
• Seattle/Tacoma Intl (SEA) - 17% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.

Yes. Being flexible with your travel dates can save you up to 40% on the Kansas City to St. Louis route. Thursday is the cheapest departure day at $411 round-trip on average, while Wednesday is the most expensive at $683, a difference of $272. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Kansas City to St. Louis flights, with 34% of flights leaving in that window. Afternoon departures account for 33%, evening flights for 33%, and night flights for 0%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from Kansas City to St. Louis:

• Earliest: departs at 5:55 am and lands at 7:00 am
• Latest: departs at 6:55 pm and lands at 8:00 pm.

The flight takes about 1h 05m.

A nonstop flight from Kansas City to St. Louis takes 1h 05m, covering 236 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $177 to $955. That means the highest observed fare was about 5x higher than the lowest one.

One-way fares from Kansas City to St. Louis are currently lower than usual. Average one-way flight prices are about $120, which is 57% below the typical average for this route.

Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 4h 35m, compared with 9h 37m via Seattle/Tacoma Intl (SEA).

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Kansas City to St. Louis range from $399 to $691, with an average of $529 over the past 12 months. Anything below $399 counts as a good deal.