CVG - STL

$73 Find Cheap Flights from Cincinnati to St. Louis - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cincinnati to St. Louis departing on 9/13. 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
$105
Typical prices: $236-$360
Frontier
Thu 8/27Sun 8/30
CVG - STL • 1 stop
Cheapest one-way
$73
Typical prices: $139-$311
Frontier
Sun 9/13
CVG - STL • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Cincinnati and St. Louis. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $275 (round-trip)
Shortest trip • 3h 39m (one-way)
Insights
Insights
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Insights
When to travel
Cheapest • 35% price drop
Most popular
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Cincinnati to St. Louis (CVG-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Cincinnati 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 Cincinnati to St. Louis

Thu, Aug 27 - Sun, Aug 30
Frontier Logo
12:26 pm - 5:22 pm
CVG
-
STL
5h 56m
1 stop
Frontier Logo
6:17 pm - 11:21 am
STL
-
CVG
16h 04m
1 stop
$105Frontier
Fri, Aug 28 - Sun, Aug 30
Frontier Logo
12:26 pm - 5:22 pm
CVG
-
STL
5h 56m
1 stop
Frontier Logo
6:17 pm - 11:21 am
STL
-
CVG
16h 04m
1 stop
$116Frontier
Wed, Sep 23 - Thu, Sep 24
American Airlines Logo
2:18 pm - 12:27 am
CVG
-
STL
11h 09m
1 stop
American Airlines Logo
5:00 am - 2:21 pm
STL
-
CVG
8h 21m
1 stop
$263American Airlines
Wed, Sep 16 - Sat, Sep 19
American Airlines Logo
10:30 am - 4:48 pm
CVG
-
STL
7h 18m
1 stop
American Airlines Logo
11:01 am - 9:04 pm
STL
-
CVG
9h 03m
1 stop
$263American Airlines
Wed, Aug 19 - Wed, Aug 19
Southwest Logo
5:40 am - 10:05 am
CVG
-
STL
5h 25m
1 stop
Southwest Logo
12:50 pm - 8:10 pm
STL
-
CVG
6h 20m
1 stop
$279Southwest
Wed, Aug 19 - Wed, Aug 19
Delta Logo
6:52 am - 9:54 am
CVG
-
STL
4h 02m
1 stop
Delta Logo
2:10 pm - 7:54 pm
STL
-
CVG
4h 44m
1 stop
$279Delta
Wed, Sep 23 - Thu, Sep 24
Southwest Logo
5:40 am - 1:55 pm
CVG
-
STL
9h 15m
2 stops
Southwest Logo
4:15 pm - 10:25 pm
STL
-
CVG
5h 10m
1 stop
$284Southwest
Tue, Oct 6 - Fri, Oct 9
Delta Logo
7:00 am - 10:51 am
CVG
-
STL
4h 51m
1 stop
Delta Logo
6:05 pm - 10:35 pm
STL
-
CVG
3h 30m
1 stop
$304Delta
Wed, Sep 30 - Sat, Oct 3
United Airlines Logo
9:00 am - 2:17 pm
CVG
-
STL
6h 17m
1 stop
United Airlines Logo
9:04 am - 5:05 pm
STL
-
CVG
7h 01m
1 stop
$349United Airlines
Fri, Dec 18 - Sun, Dec 20
United Airlines Logo
7:00 am - 10:46 am
CVG
-
STL
4h 46m
1 stop
United Airlines Logo
5:26 pm - 11:58 pm
STL
-
CVG
5h 32m
1 stop
$357United Airlines
Booking Insights

KAYAK's insights & trends for Cincinnati to St. Louis flights

Get data-powered insights and trends into flights from Cincinnati to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Cincinnati to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Cincinnati to St. Louis departing in August.

Flight prices are below average for this route right now.

Flights to St. Louis from Cincinnati usually cost between $236 and $360 in August.
The lowest price found in the past 5 days was $105 on Frontier (Aug 27-Aug 30).

What is the cheapest month to fly from Cincinnati to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Cincinnati to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Cincinnati to St. Louis is August, where tickets cost $262 (return) on average. On the other hand, the most expensive months are September and February, where the average cost of round-trip tickets is $624 and $556 respectively.

Good to know

Low season

January

Cheapest flight

$73
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 36% lower on average.
Flight from Cincinnati to St. Louis

When to book flights from Cincinnati to St. Louis

Are your dates flexible? Find out the best times to travel from Cincinnati to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Cincinnati to St. Louis

  • What is the cheapest flight from Cincinnati to St. Louis?

    In the last 5 days, the lowest price for a flight from Cincinnati to St. Louis was $73 for a one-way ticket and $105 for a round-trip.

  • Do I need a passport to fly between Cincinnati and St. Louis?

    No

  • Which airports will I be using when flying from Cincinnati to St. Louis?

    When flying out of Cincinnati you will be using Cincinnati Cinci./N. Kentucky. You will be landing at St. Louis, also known as Lambert-St Louis.

  • Which aircraft models fly most regularly from Cincinnati to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Cincinnati to St. Louis?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Cincinnati and St. Louis, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Cincinnati to St. Louis, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Cincinnati to St. Louis are Southwest and Delta. With an average price for the route of $422 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $360 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Cincinnati 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 Cincinnati to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Cincinnati to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Cincinnati 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 Cincinnati 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 Cincinnati with another airline. Booking your flights between Cincinnati and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Cincinnati 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 Cincinnati up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Cincinnati to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Cincinnati to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Cincinnati 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 4229 reviews
8.0Comfort
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
Airline reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

2.0 MediocreStuart, Mar 2026
HOU - STL
Read more Southwest reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

Everything went smoothly and we even arrived a little bit early.

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.

Southwest's seats are the least comfortable I have ever sat in.

For my birthday trip this was my second time ever flying, this trip was the best.

Crew was great flight was great baggage claim was a failure. It took over 1 hour for bags to arrive. Poor communication poor effort when I spoke to the supervisor about the delay

Everything was great except the food. The pretzels are really crappy.

I had a front row middle. I am not a big person and I barely fit in between that seat! No place to put my arms, even though the guys on each side were not taking over the arm rests. It felt like a frontier flight (if that tells you everything )

Overall is was a pretty good flight. However we were 15 mins late taking off and no one told us anything. We were all in our seats just sitting there for 15mins and all the sudden the pilot stayed we are leaving now. I think they should have at least said something after our take off time passed. Everyone was wondering what was going on. I will say the pilot did increase the speed of the plane so we arrived in time. So we weren't late.

The flight was over 2 hours late.. once we finally got boarded things were fine

Good flight. Connector flight was delayed so made a short turnaround in Atlanta which was stressful. Otherwise, great crew, Staff in ATL was very informative about the delay and ensured people their connections were fine. Notified the ones that were not. Great communication.

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Only water, tea or coffee served midflight, even to comfort seating. Man next to me needed two seats and took up a portion of my seat and Delta did nothing.

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Zero updates from the pilots for 30 minutes in the tarmac

Delta flight attendants poorly managed the boarding process and overhead storage. My bag was checked last minute and no claim ticket was provided. My bag is now lost. Complete incompetence by all flight crew involved.

As we lined up to board they gave our plane to a flight going to Newark. So then we got delayed until they could find another plane. Flight crew was ok. I’m assuming since it’s a shorter flight they only offered water and coffee.

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

Flight was delayed 14 hours due to DC air show and weather. Missed connection to MUC.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Airport terminal was outdated, flight was on a small jet with no wifi

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

We boarded and buckled and then deplaned due to no pilot. Had to wait over 3 hours for a new pilot. Not weather related, just poor management.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

I like the speed of boarding and deplaning and the fact that everything was on time. The crew (attendants) were probably quite new and did not begin the in cabin service until 30 min before landing even though there was little to no air turbulence for the last 1.5 hours of the flight. It made for a mad scramble at the end to get trash collected and carts stowed before touch down.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

I did like the employee's, they are very friendly and all smiled most of the time, Overall, from checking in bags to getting on plane, not enough employees to be able to get all on the plane, therefore I was not able to get on the plane, due to no one wea there for me to check in my bag, so I decided to go thru the security point and by the time they were done with my bags, I was told that my bag cannot be checked in, and then found out that the lady that does the check in was boarding the customers onto the plane, she said that she was going back and fourth, there for was not able to get on the plane, which changed all my flights by the time I got to Dallas, I was on standby 3 times, and wasn't sure about being able to get on the fourth plane, so ended up buying another plane ticket, so I could make my destination on time.

Not sure about entertainment as I didn't use any, so maybe there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

American Airlines “Randy” questioned why I needed preboarding and denied my request for same. Then Randy attempted to berate me when I boarded with my group. I was seated in an exit roll with a young man with a disability that exhibited difficulty controlling and settling himself. But Tandy questioned my disability. The flight was horrible. It was overpacked.

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

Information on your arrival and departure airports