STL

$56 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 12/24. 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

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Everything you should know

Cheapest round-trip
$117
Overall average: $282
Southwest
Wed 12/3Wed 12/10
MCI - STL • Non-stop
Cheapest one-way
$56
Overall average: $343
Frontier
Wed 12/24
MCI - STL • 1 stop
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Flight Deals
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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

Wed, Dec 3 - Wed, Dec 10
Southwest Logo
4:10 pm - 5:15 pmMCI-STL
1h 05mnonstop
Southwest Logo
2:25 pm - 3:35 pmSTL-MCI
1h 10mnonstop
$117Southwest
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Wed, Dec 3 - Wed, Dec 10
Southwest Logo
4:10 pm - 5:15 pmMCI-STL
1h 05mnonstop
Southwest Logo
6:15 pm - 10:30 pmSTL-MCI
4h 15m1 stop
$127Southwest
Find Deal
Wed, Dec 3 - Wed, Dec 10
Southwest Logo
12:25 pm - 1:30 pmMCI-STL
1h 05mnonstop
Southwest Logo
11:15 am - 5:15 pmSTL-MCI
6h 00m2 stops
$132Southwest
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Tue, Dec 2 - Tue, Dec 9
American Airlines Logo
9:35 am - 4:27 pmMCI-STL
6h 52m1 stop
American Airlines Logo
9:30 am - 1:50 pmSTL-MCI
4h 20m1 stop
$179American Airlines
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Wed, Nov 26 - Wed, Dec 3
Frontier Logo
11:20 am - 2:29 pmMCI-STL
27h 09m1 stop
Frontier Logo
7:43 pm - 7:14 pmSTL-MCI
23h 31m1 stop
$216Frontier
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Mon, Nov 24 - Mon, Dec 1
Multiple Airlines Logo
4:36 pm - 2:29 pmMCI-STL
21h 53m1 stop
Multiple Airlines Logo
4:13 pm - 12:03 pmSTL-MCI
19h 50m1 stop
$225Multiple Airlines
Find Deal
Wed, Nov 26 - Tue, Dec 2
Multiple Airlines Logo
11:20 am - 2:29 pmMCI-STL
27h 09m1 stop
Multiple Airlines Logo
3:30 pm - 12:03 pmSTL-MCI
20h 33m1 stop
$226Multiple Airlines
Find Deal
Wed, Nov 26 - Thu, Dec 4
Frontier Logo
11:20 am - 2:29 pmMCI-STL
27h 09m1 stop
Frontier Logo
12:04 pm - 11:18 amSTL-MCI
23h 14m1 stop
$227Frontier
Find Deal
Tue, Dec 2 - Sat, Dec 13
American Airlines Logo
1:45 pm - 7:30 pmMCI-STL
5h 45m1 stop
American Airlines Logo
3:59 pm - 10:54 pmSTL-MCI
6h 55m1 stop
$239American Airlines
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Fri, Nov 21 - Tue, Nov 25
United Airlines Logo
9:00 am - 12:39 pmCOU-STL
27h 39m1 stop
United Airlines Logo
9:00 am - 8:51 pmSTL-COU
11h 51m1 stop
$1,005United Airlines
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Useful Info

Good to know

Low seasonJanuary
Cheapest flight$56
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 3% increase in price.
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 4241 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

2.0 MediocreAnonymous, Nov 2025ORD - LAS
Read more Southwest reviews

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

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
Shrewsbury
Glencoe

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

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