STL

$71 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 5/8. 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
$187
Overall average: $399
American Airlines
Wed 4/1Sun 4/5
MCI - STL • 1 stop
Cheapest non-stop
$193
Typical prices: $152-$399
Southwest
Sat 3/28Mon 3/30
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

Wed, Apr 1 - Sun, Apr 5
American Airlines Logo
9:44 am - 5:13 pm
MCI
-
STL
7h 29m
1 stop
American Airlines Logo
5:12 am - 10:12 am
STL
-
MCI
5h 00m
1 stop
$187American Airlines
Thu, Feb 26 - Mon, Mar 2
Frontier Logo
9:24 pm - 1:09 pm
MCI
-
STL
15h 45m
1 stop
Frontier Logo
1:54 pm - 7:48 pm
STL
-
MCI
5h 54m
1 stop
$192Frontier
Sat, Mar 28 - Mon, Mar 30
Southwest Logo
5:45 pm - 6:50 pm
MCI
-
STL
1h 05mnonstop
Southwest Logo
4:05 pm - 5:15 pm
STL
-
MCI
1h 10mnonstop
$193Southwest
Sat, Feb 28 - Wed, Mar 4
American Airlines Logo
9:05 am - 1:50 pm
MCI
-
STL
4h 45m
1 stop
American Airlines Logo
4:13 pm - 11:06 pm
STL
-
MCI
6h 53m
1 stop
$195American Airlines
Tue, Mar 3 - Tue, Mar 10
Southwest Logo
6:50 am - 12:20 pm
MCI
-
STL
5h 30m
1 stop
Southwest Logo
5:35 pm - 10:55 pm
STL
-
MCI
5h 20m
1 stop
$197Southwest
Tue, Mar 3 - Tue, Mar 10
Southwest Logo
11:00 am - 4:50 pm
MCI
-
STL
5h 50m
2 stops
Southwest Logo
5:35 pm - 10:55 pm
STL
-
MCI
5h 20m
1 stop
$202Southwest
Sat, Mar 28 - Mon, Mar 30
Southwest Logo
5:45 pm - 6:50 pm
MCI
-
STL
1h 05mnonstop
Southwest Logo
7:25 pm - 11:30 pm
STL
-
MCI
4h 05m
1 stop
$203Southwest
Wed, Mar 11 - Thu, Mar 12
Southwest Logo
6:15 pm - 10:20 pm
MCI
-
STL
4h 05m
1 stop
Southwest Logo
5:20 am - 12:00 pm
STL
-
MCI
6h 40m
1 stop
$205Southwest
Sat, Mar 28 - Mon, Mar 30
Southwest Logo
3:55 pm - 8:45 pm
MCI
-
STL
4h 50m
1 stop
Southwest Logo
4:45 pm - 10:55 pm
STL
-
MCI
6h 10m
1 stop
$213Southwest
Sun, Mar 22 - Sat, Mar 28
Frontier Logo
8:40 pm - 9:49 am
MCI
-
STL
13h 09m
1 stop
Frontier Logo
1:58 pm - 2:55 pm
STL
-
MCI
24h 57m
1 stop
$241Frontier
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$71
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 7% 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 4283 reviews
8.1Boarding
8.0Comfort
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

2.0 MediocreMike, Feb 2026
LAS - OKC
Read more Southwest reviews

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

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