MCI - STL

$49 Find Cheap Flights from Kansas City to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Kansas City to St. Louis departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Kansas City to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Kansas City to St. Louis, as well as popular online travel agencies
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Flights Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Kansas City to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Kansas City to St. Louis

Tue, Aug 26 - Tue, Sep 2
Southwest Logo
11:30 am - 12:35 pmMCI-STL
1h 05mnonstop
Southwest Logo
8:45 pm - 9:50 pmSTL-MCI
1h 05mnonstop
$97Southwest
Find Deal
Tue, Aug 26 - Tue, Sep 2
Southwest Logo
5:05 pm - 9:50 pmMCI-STL
4h 45m1 stop
Southwest Logo
1:20 pm - 2:25 pmSTL-MCI
1h 05mnonstop
$107Southwest
Find Deal
Mon, Aug 25 - Wed, Sep 3
Frontier Logo
2:18 pm - 9:11 amMCI-STL
18h 53m1 stop
Frontier Logo
7:54 pm - 1:48 pmSTL-MCI
17h 54m1 stop
$195Frontier
Find Deal
Mon, Aug 18 - Thu, Aug 21
Frontier Logo
8:01 pm - 9:11 amMCI-STL
13h 10m1 stop
Frontier Logo
7:54 pm - 5:17 pmSTL-MCI
21h 23m1 stop
$205Frontier
Find Deal
Mon, Aug 18 - Tue, Aug 19
American Airlines Logo
3:17 pm - 7:09 pmMCI-STL
3h 52m1 stop
American Airlines Logo
7:23 am - 8:48 pmSTL-MCI
13h 25m1 stop
$304American Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
Spirit Airlines Logo
6:00 am - 9:40 amMCI-STL
27h 40m2 stops
Spirit Airlines Logo
2:30 pm - 10:53 pmSTL-MCI
32h 23m3 stops
$329Spirit Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
American Airlines Logo
6:11 pm - 10:59 pmMCI-STL
4h 48m1 stop
American Airlines Logo
5:15 am - 9:49 amSTL-MCI
4h 34m1 stop
$331American Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
Spirit Airlines Logo
6:00 am - 9:40 amMCI-STL
27h 40m2 stops
Spirit Airlines Logo
2:30 pm - 10:53 pmSTL-MCI
32h 23m3 stops
$332Spirit Airlines
Find Deal
Sat, Aug 23 - Tue, Sep 2
Delta Logo
5:50 am - 7:07 pmMCI-STL
13h 17m1 stop
Delta Logo
3:36 pm - 11:54 pmSTL-MCI
8h 18m1 stop
$383Delta
Find Deal
Mon, Aug 25 - Sat, Aug 30
Delta Logo
6:42 pm - 9:15 amMCI-STL
14h 33m1 stop
Delta Logo
7:00 am - 6:56 pmSTL-MCI
11h 56m1 stop
$405Delta
Find Deal
Expert advice

Expert advice for your flight from Kansas City to St. Louis

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
MCI

MCI's compact terminal makes departures easy. Security is right behind check-in, leading directly to gates. Arrive two hours early to enjoy local dining options.

Read more about MCIby John Walton
STL

Use MetroLink for easy city access from STL. The Red Line connects the airport to downtown St. Louis, avoiding rush hour traffic.

Read more about STLby Yulia Denisyuk
Our travel experts
John Walton

John Walton

Expert on MCI

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Booking Insights

KAYAK's insights & trends for Kansas City to St. Louis flights

Get data-powered insights and trends into flights from Kansas City to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Kansas City to St. Louis?

The average price of all round-trip flights from Kansas City to St. Louis clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to St. Louis on a Thursday and more expensive on a Monday. On your return trip to Kansas City, you should consider flying back on a Saturday, and avoid Sundays for better deals.

What is the cheapest month to fly from Kansas City to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Kansas City to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Kansas City to St. Louis is March, where tickets cost $152 (return) on average. On the other hand, the most expensive months are February and October, where the average cost of round-trip tickets is $602 and $489 respectively.

Good to know

Low seasonAugust
Cheapest flight$49
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 20% increase in price.
Flight from Kansas City to St. Louis

When to book flights from Kansas City to St. Louis

Are your dates flexible? Find out the best times to travel from Kansas City to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Kansas City to St. Louis

  • What is the cheapest flight from Kansas City to St. Louis?

    In the last 3 days, the lowest price for a flight from Kansas City to St. Louis was $49 for a one-way ticket and $97 for a round-trip.

  • Do I need a passport to fly between Kansas City and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Kansas City to St. Louis?

    American Airlines, Delta, and JetBlue offer inflight Wi-Fi service on the Kansas City to St. Louis flight route.

  • Which aircraft models fly most regularly from Kansas City to St. Louis?

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Kansas City to St. Louis flight route.

  • On which days can I fly direct from Kansas City to St. Louis?

    There are nonstop flights from Kansas City to St. Louis on a daily basis.

  • How does KAYAK find such low prices on flights from Kansas City to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Kansas City to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Kansas City to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Kansas City is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Kansas City to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Kansas City with another airline. Booking your flights between Kansas City and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Kansas City to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Kansas City up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Kansas City to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $135 or less one-way and $282 or less round-trip.

Prefer to fly direct from Kansas City to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Kansas City to Lambert-St Louis.
Find which airlines fly direct from Kansas City Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Kansas City to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Lambert-St Louis to Kansas City

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top airline flying from Kansas City to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Kansas City to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Kansas City to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4241 reviews
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

It was one and half hour late... Not sure if any other experience matters.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

Everything you need to know for your flight from Kansas City to St. Louis

Information on your arrival and departure airports

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