STL

$61 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 1/9. 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
$148
Overall average: $319
Frontier
Thu 1/8Wed 1/14
MCI - STL • 1 stop
Cheapest non-stop
$181
Typical prices: $287-$352
Southwest
Wed 1/7Wed 1/14
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

Thu, Jan 8 - Wed, Jan 14
Frontier Logo
8:23 pm - 10:02 amMCI-STL
13h 39m1 stop
Frontier Logo
3:43 pm - 7:48 pmSTL-MCI
28h 05m1 stop
$148Frontier
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Thu, Jan 8 - Sat, Jan 17
Frontier Logo
8:23 pm - 10:02 amMCI-STL
13h 39m1 stop
Frontier Logo
3:43 pm - 7:42 pmSTL-MCI
27h 59m1 stop
$154Frontier
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Thu, Jan 8 - Tue, Jan 13
Multiple Airlines Logo
8:23 pm - 10:02 amMCI-STL
13h 39m1 stop
Multiple Airlines Logo
5:11 pm - 4:09 pmSTL-MCI
22h 58m1 stop
$167Multiple Airlines
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Thu, Jan 8 - Mon, Jan 12
Multiple Airlines Logo
8:23 pm - 10:02 amMCI-STL
13h 39m1 stop
Multiple Airlines Logo
8:50 am - 4:09 pmSTL-MCI
7h 19m1 stop
$169Multiple Airlines
Find Deal
Wed, Jan 7 - Wed, Jan 14
Southwest Logo
3:55 pm - 5:00 pmMCI-STL
1h 05mnonstop
Southwest Logo
10:15 am - 11:25 amSTL-MCI
1h 10mnonstop
$181Southwest
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Wed, Jan 7 - Wed, Jan 14
Southwest Logo
6:10 am - 7:25 amMCI-STL
1h 15mnonstop
Southwest Logo
5:50 pm - 10:20 pmSTL-MCI
4h 30m1 stop
$186Southwest
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Wed, Dec 31 - Wed, Jan 7
American Airlines Logo
10:09 am - 8:35 amCOU-STL
22h 26m1 stop
American Airlines Logo
6:00 am - 9:10 pmSTL-COU
39h 10m1 stop
$262American Airlines
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Mon, Dec 29 - Mon, Jan 5
American Airlines Logo
7:44 pm - 8:48 amCOU-STL
37h 04m1 stop
American Airlines Logo
9:08 am - 11:23 amSTL-COU
26h 15m1 stop
$375American Airlines
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Sat, Dec 13 - Wed, Dec 17
United Airlines Logo
9:00 am - 8:57 pmCOU-STL
11h 57m1 stop
United Airlines Logo
10:00 am - 5:40 pmSTL-COU
7h 40m1 stop
$690United Airlines
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Sat, Dec 13 - Wed, Dec 17
United Airlines Logo
3:25 pm - 11:01 amCOU-STL
19h 36m1 stop
United Airlines Logo
9:00 am - 8:29 pmSTL-COU
11h 29m1 stop
$700United Airlines
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Useful Info

Good to know

Low seasonJanuary
Cheapest flight$61
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 15% 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 4253 reviews
7.5Entertainment
8.1Boarding
8.0Comfort
8.6Crew
7.0Food
Airline reviews

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

10.0 ExcellentDavid, Nov 2025BUF - PHX
Read more Southwest reviews

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

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.

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