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Cheap flights from Cincinnati to St. Louis from $115

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cincinnati to St. Louis departing on 6/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Cincinnati to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:52 pm - 11:59 pm
CVG
-
STL
10h 07m
1 stop
Frontier Logo
4:09 pm - 11:46 pm
STL
-
CVG
6h 37m
1 stop
$244Frontier
Sat, Aug 8 - Tue, Aug 11
Frontier Logo
8:36 pm - 7:23 pm
CVG
-
STL
23h 47m
1 stop
Frontier Logo
4:09 pm - 12:58 pm
STL
-
CVG
19h 49m
1 stop
$249Frontier
Tue, Jul 21 - Thu, Jul 23
Frontier Logo
12:18 pm - 5:37 pm
CVG
-
STL
6h 19m
1 stop
Frontier Logo
4:09 pm - 8:18 am
STL
-
CVG
15h 09m
1 stop
$250Frontier
Tue, Jul 21 - Fri, Jul 24
Frontier Logo
9:30 pm - 6:05 pm
CVG
-
STL
21h 35m
1 stop
Frontier Logo
4:09 pm - 1:51 pm
STL
-
CVG
20h 42m
1 stop
$261Frontier
Mon, Jul 20 - Wed, Jul 22
Frontier Logo
7:15 am - 11:59 pm
CVG
-
STL
17h 44m
1 stop
Frontier Logo
4:09 pm - 8:18 am
STL
-
CVG
15h 09m
1 stop
$262Frontier
Wed, Jul 15 - Fri, Jul 17
Frontier Logo
2:52 pm - 11:59 pm
CVG
-
STL
10h 07m
1 stop
Frontier Logo
4:09 pm - 12:58 pm
STL
-
CVG
19h 49m
1 stop
$264Frontier
Sat, Aug 1 - Sun, Aug 2
Frontier Logo
12:24 pm - 5:30 pm
CVG
-
STL
6h 06m
1 stop
Frontier Logo
4:17 pm - 11:46 pm
STL
-
CVG
6h 29m
1 stop
$268Frontier
Thu, Jun 18 - Mon, Jun 22
Frontier Logo
8:36 pm - 6:53 pm
CVG
-
STL
23h 17m
1 stop
Frontier Logo
4:09 pm - 11:46 pm
STL
-
CVG
6h 37m
1 stop
$270Frontier
Fri, Jul 3 - Mon, Jul 6
Frontier Logo
9:00 pm - 2:06 pm
CVG
-
STL
18h 06m
1 stop
Frontier Logo
4:17 pm - 11:46 pm
STL
-
CVG
6h 29m
1 stop
$281Frontier
Fri, Jun 19 - Mon, Jun 22
Frontier Logo
8:36 pm - 6:53 pm
CVG
-
STL
23h 17m
1 stop
Frontier Logo
7:10 pm - 8:25 pm
STL
-
CVG
24h 15m
1 stop
$282Frontier
Fri, Jul 3 - Sun, Jul 5

United Airlines flights from Cincinnati to St. Louis

Our best United Airlines deals on Cincinnati to St. Louis flight tickets
United Airlines
Aug 10
CVG6:15 pmCincinnati Cinci./N. Kentucky
6h 29m
1 stop
STL11:44 pmLambert-St Louis
Aug 12
STL8:00 amLambert-St Louis
4h 09m
1 stop
CVG1:09 pmCincinnati Cinci./N. Kentucky
$331
United Airlines
Aug 10
CVG6:12 pmCincinnati Cinci./N. Kentucky
4h 14m
1 stop
STL9:26 pmLambert-St Louis
Aug 12
STL7:25 amLambert-St Louis
4h 44m
1 stop
CVG1:09 pmCincinnati Cinci./N. Kentucky
$373
United Airlines
Jun 12
CVG9:08 amCincinnati Cinci./N. Kentucky
4h 03m
1 stop
STL12:11 pmLambert-St Louis
Jun 16
STL6:00 amLambert-St Louis
8h 41m
1 stop
CVG3:41 pmCincinnati Cinci./N. Kentucky
$459

American Airlines flights from Cincinnati to St. Louis

Our best American Airlines deals on Cincinnati to St. Louis flight tickets
American Airlines
Aug 4
CVG5:08 amCincinnati Cinci./N. Kentucky
4h 25m
1 stop
STL8:33 amLambert-St Louis
Aug 4
STL12:40 pmLambert-St Louis
4h 05m
1 stop
CVG5:45 pmCincinnati Cinci./N. Kentucky
$287
American Airlines
Aug 4
CVG10:05 amCincinnati Cinci./N. Kentucky
4h 48m
1 stop
STL1:53 pmLambert-St Louis
Aug 4
STL5:58 pmLambert-St Louis
5h 32m
1 stop
CVG12:30 amCincinnati Cinci./N. Kentucky
$295
American Airlines
Jun 19
CVG1:30 pmCincinnati Cinci./N. Kentucky
4h 03m
1 stop
STL4:33 pmLambert-St Louis
Jun 21
STL1:42 pmLambert-St Louis
6h 20m
1 stop
CVG9:02 pmCincinnati Cinci./N. Kentucky
$387

momondo Fare Finder

 
Customize your flight search to find flights from Cincinnati to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 30, 2026.
Use the filters below to find and compare flights from Cincinnati to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 8/8

2:52 pm-11:59 pm

1 stop10h 07m

Lambert-St Louis

Tue 8/11

4:09 pm-11:46 pm

1 stop6h 37m

$244

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 7/21

8:36 pm-7:23 pm

1 stop23h 47m

Lambert-St Louis

Thu 7/23

4:09 pm-12:58 pm

1 stop19h 49m

$249

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 7/21

12:18 pm-5:37 pm

1 stop6h 19m

Lambert-St Louis

Fri 7/24

4:09 pm-8:18 am

1 stop15h 09m

$250

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 7/20

9:30 pm-6:05 pm

1 stop21h 35m

Lambert-St Louis

Wed 7/22

4:09 pm-1:51 pm

1 stop20h 42m

$261

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 7/15

7:15 am-11:59 pm

1 stop17h 44m

Lambert-St Louis

Fri 7/17

4:09 pm-8:18 am

1 stop15h 09m

$262

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 8/1

2:52 pm-11:59 pm

1 stop10h 07m

Lambert-St Louis

Sun 8/2

4:09 pm-12:58 pm

1 stop19h 49m

$264
Quickest round-trip

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 6/18

12:24 pm-5:30 pm

1 stop6h 06m

Lambert-St Louis

Mon 6/22

4:17 pm-11:46 pm

1 stop6h 29m

$268

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 7/3

8:36 pm-6:53 pm

1 stop23h 17m

Lambert-St Louis

Mon 7/6

4:09 pm-11:46 pm

1 stop6h 37m

$270

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 6/19

9:00 pm-2:06 pm

1 stop18h 06m

Lambert-St Louis

Mon 6/22

4:17 pm-11:46 pm

1 stop6h 29m

$281

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 7/3

8:36 pm-6:53 pm

1 stop23h 17m

Lambert-St Louis

Sun 7/5

7:10 pm-8:25 pm

1 stop24h 15m

$282

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Cincinnati to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Cincinnati and St. Louis?

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

In general, August is the cheapest month to fly from Cincinnati to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $269. The month of January is another great option to travel to St. Louis, with average flight prices from Cincinnati averaging around $297.

How have Cincinnati to St. Louis flight prices changed over time?

When to book flights from Cincinnati to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Cincinnati to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Cincinnati to St. Louis (CVG to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cincinnati to St. Louis

Fastest flight time

3h 46m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 3h 46m
There are no direct flights from Cincinnati to St. Louis. There are no popular flight routes from Cincinnati to St. Louis.
Search flight deals

Frequently asked questions about flying from Cincinnati to St. Louis

  • How far is Cincinnati Cinci./N. Kentucky to Lambert-St Louis by plane?

    A flight from Cincinnati Cinci./N. Kentucky to Lambert-St Louis will travel around 307.3 mi. Flights usually cover this in 3h 46m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Cincinnati Cinci./N. Kentucky Airport to Lambert-St Louis Airport?

    Prices for flights from Cincinnati Cinci./N. Kentucky Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Cincinnati Cinci./N. Kentucky Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Cincinnati Cinci./N. Kentucky Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cincinnati Cinci./N. Kentucky Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Cincinnati to St. Louis?

Best airlines flying from Cincinnati to St. Louis

Compare and see reviews for airlines that fly from Cincinnati to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $85Free CancellationRating
5.6
2,929 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.1
11,640 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,416 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,262 reviews
Search Southwest flights
United AirlinesPriceFrom $259Free CancellationRating
7.4
9,766 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Eureka
Litchfield
Clayton
Edwardsville
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Cincinnati to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Cincinnati to St. Louis for you.

Can I find flights from Cincinnati to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Cincinnati on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Cincinnati to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Cincinnati to St. Louis.

I’m not ready to book a flight from Cincinnati to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Cincinnati to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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