STL

$49 Find Cheap Flights from Missouri 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 to St. Louis departing on 10/16. 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

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Flight Deals

Cheap Flights from Missouri to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Missouri 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 Missouri to St. Louis

Thu, Dec 4 - Sat, Dec 6
Southwest Logo
6:15 am - 7:30 amMCI-STL
1h 15mnonstop
Southwest Logo
5:50 pm - 7:00 pmSTL-MCI
1h 10mnonstop
$97Southwest
Find Deal
Thu, Dec 4 - Sat, Dec 6
Southwest Logo
4:10 pm - 5:15 pmMCI-STL
1h 05mnonstop
Southwest Logo
8:25 am - 3:40 pmSTL-MCI
7h 15m1 stop
$107Southwest
Find Deal
Sun, Oct 12 - Mon, Oct 20
Multiple Airlines Logo
8:38 pm - 9:07 amMCI-STL
12h 29m1 stop
Multiple Airlines Logo
9:59 pm - 2:00 pmSTL-MCI
16h 01m1 stop
$208Multiple Airlines
Find Deal
Sun, Oct 12 - Mon, Oct 20
Multiple Airlines Logo
8:38 pm - 9:07 amMCI-STL
12h 29m1 stop
Multiple Airlines Logo
7:52 pm - 2:00 pmSTL-MCI
18h 08m2 stops
$240Multiple Airlines
Find Deal
Fri, Oct 10 - Fri, Oct 17
Frontier Logo
8:38 pm - 9:07 amMCI-STL
12h 29m1 stop
Frontier Logo
7:52 pm - 5:55 pmSTL-MCI
22h 03m1 stop
$258Frontier
Find Deal
Fri, Oct 10 - Mon, Oct 13
American Airlines Logo
1:49 pm - 8:09 amCOU-STL
18h 20m1 stop
American Airlines Logo
7:16 am - 11:07 amSTL-COU
27h 51m1 stop
$265American Airlines
Find Deal
Wed, Oct 8 - Thu, Oct 9
Frontier Logo
7:02 pm - 9:07 amMCI-STL
14h 05m1 stop
Frontier Logo
7:52 pm - 7:53 pmSTL-MCI
24h 01m1 stop
$268Frontier
Find Deal
Wed, Oct 15 - Mon, Oct 20
American Airlines Logo
1:30 pm - 11:54 pmMCI-STL
10h 24m1 stop
American Airlines Logo
8:42 am - 8:52 pmSTL-MCI
12h 10m1 stop
$333American Airlines
Find Deal
Thu, Nov 6 - Mon, Nov 10
United Airlines Logo
8:00 am - 3:46 pmMCI-STL
7h 46m1 stop
United Airlines Logo
6:43 pm - 4:05 pmSTL-MCI
21h 22m2 stops
$440United Airlines
Find Deal
Thu, Oct 9 - Sat, Oct 11
United Airlines Logo
7:30 am - 3:44 pmMCI-STL
8h 14m1 stop
United Airlines Logo
12:25 pm - 11:30 pmSTL-MCI
11h 05m2 stops
$471United Airlines
Find Deal

Everything you should know

Cheapest round-trip
$97
Overall average: $282
Southwest
Thu 12/4Sat 12/6
MCI - STL • Non-stop
Cheapest one-way
$49
Typical prices: $166-209
Southwest
Thu 10/16
MCI - STL • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$49
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Kansas City to St. Louis

FAQs for booking flights from Missouri to St. Louis

  • How does KAYAK find such low prices on flights from Missouri 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 Missouri to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Missouri 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 Missouri 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 Missouri with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri 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 Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Missouri to St. Louis

 
Need help choosing which airline to fly with from Missouri 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 4242 reviews
7.5Entertainment
8.6Crew
7.0Food
8.1Boarding
8.0Comfort
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Glencoe
Shrewsbury

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

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