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 9/8. 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

Sat, Sep 6 - Mon, Sep 8
Southwest Logo
8:35 am - 9:40 amMCI-STL
1h 05mnonstop
Southwest Logo
9:50 am - 10:55 amSTL-MCI
1h 05mnonstop
$124Southwest
Find Deal
Sat, Sep 6 - Mon, Sep 8
Southwest Logo
8:35 am - 9:40 amMCI-STL
1h 05mnonstop
Southwest Logo
6:50 pm - 10:35 pmSTL-MCI
3h 45m1 stop
$134Southwest
Find Deal
Sat, Sep 6 - Mon, Sep 8
Southwest Logo
2:50 pm - 8:30 pmMCI-STL
5h 40m1 stop
Southwest Logo
4:20 pm - 10:05 pmSTL-MCI
5h 45m1 stop
$144Southwest
Find Deal
Thu, Jul 10 - Thu, Jul 17
Spirit Airlines Logo
10:30 am - 9:52 amMCI-STL
23h 22m1 stop
Spirit Airlines Logo
10:47 am - 1:37 pmSTL-MCI
26h 50m2 stops
$257Spirit Airlines
Find Deal
Thu, Jul 10 - Thu, Jul 17
Spirit Airlines Logo
10:30 am - 9:52 amMCI-STL
23h 22m1 stop
Spirit Airlines Logo
10:47 am - 5:09 pmSTL-MCI
30h 22m3 stops
$286Spirit Airlines
Find Deal
Fri, Aug 1 - Sun, Aug 3
Frontier Logo
11:20 am - 1:59 pmMCI-STL
26h 39m1 stop
Frontier Logo
2:36 pm - 10:21 amSTL-MCI
19h 45m1 stop
$298Frontier
Find Deal
Fri, Jul 25 - Sun, Jul 27
Frontier Logo
11:20 am - 1:59 pmMCI-STL
26h 39m1 stop
Frontier Logo
2:36 pm - 10:21 amSTL-MCI
19h 45m1 stop
$322Frontier
Find Deal
Fri, Jul 4 - Mon, Jul 7
Logo
11:00 am - 6:41 pmMCI-STL
7h 41m2 stops
Logo
7:13 pm - 6:55 pmSTL-MCI
23h 42m2 stops
$337
Find Deal
Fri, Jul 4 - Mon, Jul 7
Logo
11:00 am - 6:41 pmMCI-STL
7h 41m2 stops
Logo
7:13 pm - 1:37 pmSTL-MCI
42h 24m3 stops
$376
Find Deal
Mon, Jul 21 - Tue, Jul 22
American Airlines Logo
4:59 pm - 11:51 pmMCI-STL
6h 52m1 stop
American Airlines Logo
5:30 am - 9:53 amSTL-MCI
4h 23m1 stop
$521American Airlines
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
Useful Info

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 Tuesday and more expensive on a Saturday. 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.

Find deals

Good to know

Low seasonJune
High seasonApril
Cheapest flight$49
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 23% 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 $124 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?

    Delta, American Airlines, 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 $193 or less one-way and $356 or less round-trip.

Prefer to fly direct from Kansas City to 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
See more direct flights

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 4287 reviews
7.1Food
8.2Boarding
8.0Comfort
7.6Entertainment
8.6Crew
Airline reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

6.0 GoodDavid, Jun 2025BWI - COS
Read more Southwest reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

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

Information on your arrival and departure airports

Kansas City (MCI)
St. Louis (STL)

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