STL

$80 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 2/22. 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
$163
Overall average: $602
Frontier
Fri 2/20Sat 2/28
MCI - STL • 1 stop
Cheapest non-stop
$342
Typical prices: $583-$602
Southwest
Tue 2/10Wed 2/11
MCI - STL • Non-stop
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Flight Deals
Useful Info
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

Fri, Feb 20 - Sat, Feb 28
Frontier Logo
11:00 am - 6:51 am
MCI
-
STL
19h 51m
1 stop
Frontier Logo
8:17 pm - 9:58 am
STL
-
MCI
13h 41m
1 stop
$163Frontier
Fri, Feb 20 - Fri, Feb 27
Frontier Logo
11:00 am - 6:51 am
MCI
-
STL
19h 51m
1 stop
Frontier Logo
1:59 pm - 7:48 pm
STL
-
MCI
5h 49m
1 stop
$167Frontier
Thu, Feb 19 - Sat, Feb 21
Frontier Logo
8:28 pm - 1:09 pm
MCI
-
STL
16h 41m
1 stop
Frontier Logo
2:51 pm - 7:46 pm
STL
-
MCI
4h 55m
1 stop
$170Frontier
Fri, Feb 20 - Fri, Feb 27
Frontier Logo
11:00 am - 6:51 am
MCI
-
STL
19h 51m
1 stop
Frontier Logo
10:11 pm - 7:46 pm
STL
-
MCI
21h 35m
2 stops
$176Frontier
Mon, Mar 2 - Wed, Mar 4
Southwest Logo
3:35 pm - 9:45 pm
MCI
-
STL
6h 10m
1 stop
Southwest Logo
10:15 am - 11:25 am
STL
-
MCI
1h 10mnonstop
$195Southwest
Mon, Mar 2 - Wed, Mar 4
Southwest Logo
11:15 am - 3:55 pm
MCI
-
STL
4h 40m
1 stop
Southwest Logo
10:15 am - 5:00 pm
STL
-
MCI
6h 45m
2 stops
$210Southwest
Fri, Feb 20 - Sat, Feb 28
Multiple Airlines Logo
11:00 am - 12:27 am
MCI
-
STL
13h 27m
2 stops
Multiple Airlines Logo
8:17 pm - 9:58 am
STL
-
MCI
13h 41m
1 stop
$212Multiple Airlines
Thu, Feb 19 - Sat, Feb 21
Multiple Airlines Logo
11:26 am - 6:51 am
MCI
-
STL
19h 25m
2 stops
Multiple Airlines Logo
8:17 pm - 9:29 am
STL
-
MCI
13h 12m
1 stop
$213Multiple Airlines
Thu, Feb 5 - Mon, Feb 9
Frontier Logo
8:43 pm - 6:44 pm
MCI
-
STL
22h 01m
1 stop
Frontier Logo
1:40 pm - 7:51 pm
STL
-
MCI
6h 11m
1 stop
$230Frontier
Thu, Feb 5 - Mon, Feb 9
American Airlines Logo
3:19 pm - 1:03 pm
COU
-
STL
21h 44m
1 stop
American Airlines Logo
8:31 am - 2:55 pm
STL
-
COU
30h 24m
1 stop
$600American Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$80
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly and prices are also 5% 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 4266 reviews
8.1Boarding
8.6Crew
8.0Comfort
7.5Entertainment
7.0Food
Airline reviews

Great flight but super high price. Glad it was a business trip and not personal

10.0 ExcellentPieter, Jan 2026
LGB - DAL
Read more Southwest reviews

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

We got exit row seats both flights. Everything was running on time

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Pretty seamless, just a tad bit late in taking off and landing.

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

St. Louis (STL)