MCI - STL

$90 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 4/16. 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, 0 bags

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$253
Typical prices: $321-$695
Southwest
Thu 4/9Thu 4/16
MCI - STL • 1 stop
Cheapest non-stop
$307
Typical prices: $339-$695
Southwest
Thu 4/9Thu 4/16
MCI - STL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
MCI's compact terminal makes departures easy.
Use MetroLink for easy city access from STL.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Southwest
Cheapest • from $253 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with Southwest. Average duration is 1h 05m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Chicago (ORD)
Cheapest • Avg $370 (round-trip)
Chicago (ORD)
Shortest trip • 3h 29m (one-way)
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 61% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight 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

Thu, Apr 9 - Thu, Apr 16
Southwest Logo
5:55 pm - 11:50 pm
MCI
-
STL
5h 55m
1 stop
Southwest Logo
5:40 am - 9:20 am
STL
-
MCI
3h 40m
1 stop
$253Southwest
Thu, Apr 9 - Thu, Apr 16
Southwest Logo
6:20 pm - 10:40 pm
MCI
-
STL
4h 20m
1 stop
Southwest Logo
9:50 pm - 10:55 pm
STL
-
MCI
1h 05mnonstop
$280Southwest
Sat, Apr 11 - Sat, Apr 18
Frontier Logo
8:43 pm - 10:38 am
MCI
-
STL
13h 55m
2 stops
Frontier Logo
8:17 pm - 1:30 pm
STL
-
MCI
17h 13m
1 stop
$295Frontier
Thu, Apr 9 - Thu, Apr 16
Frontier Logo
8:46 pm - 9:48 am
MCI
-
STL
13h 02m
1 stop
Frontier Logo
9:55 pm - 1:30 pm
STL
-
MCI
15h 35m
2 stops
$298Frontier
Thu, Apr 9 - Thu, Apr 16
Southwest Logo
8:25 am - 9:30 am
MCI
-
STL
1h 05mnonstop
Southwest Logo
9:50 pm - 10:55 pm
STL
-
MCI
1h 05mnonstop
$307Southwest
Thu, Apr 16 - Sat, Apr 18
Frontier Logo
11:53 am - 6:50 am
MCI
-
STL
18h 57m
1 stop
Frontier Logo
8:17 pm - 1:30 pm
STL
-
MCI
17h 13m
1 stop
$310Frontier
Thu, Apr 16 - Sat, Apr 18
Frontier Logo
11:53 am - 6:50 am
MCI
-
STL
18h 57m
1 stop
Frontier Logo
8:17 pm - 10:58 am
STL
-
MCI
14h 41m
2 stops
$311Frontier
Fri, Apr 3 - Sun, Apr 5
Southwest Logo
5:35 pm - 6:40 pm
MCI
-
STL
1h 05mnonstop
Southwest Logo
5:20 am - 9:05 am
STL
-
MCI
3h 45m
1 stop
$312Southwest
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
5:05 pm - 9:52 pm
MCI
-
STL
4h 47m
1 stop
United Airlines Logo
6:00 am - 2:19 pm
STL
-
MCI
8h 19m
1 stop
$313United Airlines
Thu, Apr 9 - Thu, Apr 16
Frontier Logo
8:46 pm - 9:48 am
MCI
-
STL
13h 02m
1 stop
Frontier Logo
9:55 pm - 1:30 pm
STL
-
MCI
15h 35m
2 stops
$314Frontier
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.

How much is a round-trip flight from Kansas City to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Kansas City to St. Louis departing in April.

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 Saturday. On your return trip to Kansas City, you should consider flying back on a Wednesday, and avoid Mondays 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 November, where tickets cost $171 (return) on average. On the other hand, the most expensive months are February and January, where the average cost of round-trip tickets is $765 and $653 respectively.

Can I save money by flying with a layover from Kansas City to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $287 on average.

Find deals
Expert advice

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

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
John Walton

John Walton

Expert on MCI

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 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

Good to know

Low seasonAugust
Cheapest flight$90
Best time to beat the crowds but there is an average 33% increase in price.
Most popular time to fly with an average 12% 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 $90 for a one-way ticket and $253 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, and American Airlines 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 MAX 8 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 $202 or less one-way and $391 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 4320 reviews
8.0Comfort
7.0Food
7.5Entertainment
8.1Boarding
8.6Crew
Airline reviews

We had a 5 hour delay on the tarmac in Baltimore

2.0 MediocreDavid, Mar 2026
ALB - BWI
Read more Southwest reviews

We had a 5 hour delay on the tarmac in Baltimore

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

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)