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 9/15. 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

Mon, Sep 8 - Wed, Sep 10
Frontier Logo
3:01 pm - 9:06 amMCI-STL
18h 05m1 stop
Frontier Logo
7:55 pm - 1:48 pmSTL-MCI
17h 53m1 stop
$151Frontier
Find Deal
Mon, Sep 15 - Wed, Sep 17
Frontier Logo
3:01 pm - 9:06 amMCI-STL
18h 05m1 stop
Frontier Logo
7:55 pm - 1:48 pmSTL-MCI
17h 53m1 stop
$157Frontier
Find Deal
Sun, Sep 14 - Wed, Sep 17
Frontier Logo
3:01 pm - 9:06 amMCI-STL
18h 05m1 stop
Frontier Logo
7:55 pm - 1:48 pmSTL-MCI
17h 53m1 stop
$172Frontier
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
4:45 pm - 5:50 pmMCI-STL
1h 05mnonstop
Southwest Logo
8:45 pm - 9:50 pmSTL-MCI
1h 05mnonstop
$191Southwest
Find Deal
Wed, Sep 17 - Wed, Sep 24
Southwest Logo
11:30 am - 12:35 pmMCI-STL
1h 05mnonstop
Southwest Logo
5:50 pm - 10:25 pmSTL-MCI
4h 35m1 stop
$201Southwest
Find Deal
Fri, Sep 26 - Sun, Sep 28
 Logo
3:01 pm - 9:06 amMCI-STL
18h 05m1 stop
 Logo
10:35 am - 10:18 amSTL-MCI
23h 43m1 stop
Sun, Sep 14 - Thu, Sep 18
 Logo
3:01 pm - 9:06 amMCI-STL
18h 05m1 stop
 Logo
10:35 am - 10:18 amSTL-MCI
23h 43m1 stop
Tue, Sep 23 - Mon, Sep 29
American Airlines Logo
1:14 pm - 8:15 pmMCI-STL
7h 01m1 stop
American Airlines Logo
5:18 am - 9:56 amSTL-MCI
4h 38m1 stop
$311American Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
American Airlines Logo
5:32 am - 11:52 amMCI-STL
6h 20m1 stop
American Airlines Logo
7:16 am - 2:13 pmSTL-MCI
6h 57m1 stop
$321American Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
United Airlines Logo
9:00 am - 9:54 pmCOU-STL
12h 54m1 stop
United Airlines Logo
9:00 am - 8:51 pmSTL-COU
11h 51m1 stop
$535United Airlines
Find Deal
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$80
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 2% 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 4242 reviews
8.6Crew
8.1Boarding
8.0Comfort
7.0Food
7.5Entertainment
Airline reviews

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

2.0 MediocreMike, Aug 2025AUS - BWI
Read more Southwest reviews

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.

Other than a bit of a delay, everything was good. Again, the boarding process and picking seats is the only thing I don't enjoy.

If we are going to have to pay for luggage, make it easier to do. Put something on the app during check-in so I don't need to do it at the kiosk. I've done it twice recently and I ended up having to pay at the desk because something went wrong at the kiosk in Tampa.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

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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