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Cheap flights from Cincinnati to St. Louis from $66

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 4/24. 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
2:26 pm - 11:25 pm
CVG
-
STL
9h 59m
1 stop
Frontier Logo
8:39 am - 7:23 pm
STL
-
CVG
9h 44m
1 stop
$160Frontier
Mon, Apr 13 - Fri, Apr 17
Frontier Logo
6:53 pm - 6:50 am
CVG
-
STL
12h 57m
1 stop
Frontier Logo
8:23 pm - 5:33 pm
STL
-
CVG
20h 10m
1 stop
$166Frontier
Sun, Apr 19 - Wed, Apr 22
Frontier Logo
6:00 am - 11:19 pm
CVG
-
STL
18h 19m
1 stop
Frontier Logo
8:06 pm - 7:12 pm
STL
-
CVG
22h 06m
1 stop
$181Frontier
Mon, Apr 27 - Thu, Apr 30
Frontier Logo
6:53 pm - 6:50 am
CVG
-
STL
12h 57m
1 stop
Frontier Logo
8:23 pm - 11:55 am
STL
-
CVG
14h 32m
2 stops
$197Frontier
Sun, Apr 19 - Wed, Apr 22
Frontier Logo
5:45 am - 11:19 pm
CVG
-
STL
18h 34m
1 stop
Frontier Logo
4:51 pm - 7:23 am
STL
-
CVG
13h 32m
1 stop
$205Frontier
Mon, Mar 16 - Wed, Mar 18
Frontier Logo
2:26 pm - 11:58 pm
CVG
-
STL
10h 32m
1 stop
Frontier Logo
4:59 pm - 12:58 am
STL
-
CVG
6h 59m
1 stop
$215Frontier
Fri, Apr 10 - Mon, Apr 13
American Airlines Logo
5:00 am - 1:39 pm
CVG
-
STL
9h 39m
1 stop
American Airlines Logo
8:00 am - 5:32 pm
STL
-
CVG
8h 32m
1 stop
$223American Airlines
Wed, Mar 25 - Tue, Mar 31
Frontier Logo
12:20 pm - 11:25 pm
CVG
-
STL
12h 05m
1 stop
Frontier Logo
4:59 pm - 12:58 am
STL
-
CVG
6h 59m
1 stop
$236Frontier
Wed, Apr 8 - Mon, Apr 13
Frontier Logo
5:20 pm - 11:19 pm
CVG
-
STL
6h 59m
1 stop
Frontier Logo
4:55 pm - 11:20 am
STL
-
CVG
17h 25m
1 stop
$240Frontier
Mon, May 18 - Wed, May 20
Frontier Logo
12:19 pm - 11:58 pm
CVG
-
STL
12h 39m
2 stops
Frontier Logo
4:59 pm - 11:20 pm
STL
-
CVG
29h 21m
1 stop
$248Frontier
Fri, Apr 10 - Mon, Apr 13

Delta flights from Cincinnati to St. Louis

Our best Delta deals on Cincinnati to St. Louis flight tickets
Delta
Apr 1
CVG5:55 pmCincinnati Cinci./N. Kentucky
7h 03m
1 stop
STL11:58 pmLambert-St Louis
Apr 8
STL6:32 amLambert-St Louis
5h 59m
1 stop
CVG1:31 pmCincinnati Cinci./N. Kentucky
$255
Delta
May 28
CVG3:00 pmCincinnati Cinci./N. Kentucky
3h 56m
1 stop
STL5:56 pmLambert-St Louis
Jun 1
STL7:01 pmLambert-St Louis
4h 33m
1 stop
CVG12:34 amCincinnati Cinci./N. Kentucky
$327
Delta
Mar 17
CVG6:00 amCincinnati Cinci./N. Kentucky
4h 46m
1 stop
STL9:46 amLambert-St Louis
Mar 21
STL6:32 amLambert-St Louis
5h 59m
1 stop
CVG1:31 pmCincinnati Cinci./N. Kentucky
$357

Southwest flights from Cincinnati to St. Louis

Our best Southwest deals on Cincinnati to St. Louis flight tickets
Southwest
Apr 1
CVG4:15 pmCincinnati Cinci./N. Kentucky
7h 00m
1 stop
STL10:15 pmLambert-St Louis
Apr 8
STL2:30 pmLambert-St Louis
7h 25m
2 stops
CVG10:55 pmCincinnati Cinci./N. Kentucky
$260
Southwest
Apr 1
CVG6:30 amCincinnati Cinci./N. Kentucky
9h 05m
2 stops
STL2:35 pmLambert-St Louis
Apr 8
STL2:30 pmLambert-St Louis
7h 25m
2 stops
CVG10:55 pmCincinnati Cinci./N. Kentucky
$265
Southwest
Apr 8
CVG6:15 amCincinnati Cinci./N. Kentucky
10h 00m
2 stops
STL3:15 pmLambert-St Louis
Apr 13
STL4:00 pmLambert-St Louis
6h 25m
1 stop
CVG11:25 pmCincinnati Cinci./N. Kentucky
$271

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 March 4, 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

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 4/13

2:26 pm-11:25 pm

1 stop9h 59m

Lambert-St Louis

Fri 4/17

8:39 am-7:23 pm

1 stop9h 44m

$160

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sun 4/19

6:53 pm-6:50 am

1 stop12h 57m

Lambert-St Louis

Wed 4/22

8:23 pm-5:33 pm

1 stop20h 10m

$166

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 4/27

6:00 am-11:19 pm

1 stop18h 19m

Lambert-St Louis

Thu 4/30

8:06 pm-7:12 pm

1 stop22h 06m

$181

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sun 4/19

6:53 pm-6:50 am

1 stop12h 57m

Lambert-St Louis

Wed 4/22

8:23 pm-11:55 am

2 stops14h 32m

$197

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 3/16

5:45 am-11:19 pm

1 stop18h 34m

Lambert-St Louis

Wed 3/18

4:51 pm-7:23 am

1 stop13h 32m

$205

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 4/10

2:26 pm-11:58 pm

1 stop10h 32m

Lambert-St Louis

Mon 4/13

4:59 pm-12:58 am

1 stop6h 59m

$215

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 3/25

5:00 am-1:39 pm

1 stop9h 39m

Lambert-St Louis

Tue 3/31

8:00 am-5:32 pm

1 stop8h 32m

$223

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 4/8

12:20 pm-11:25 pm

1 stop12h 05m

Lambert-St Louis

Mon 4/13

4:59 pm-12:58 am

1 stop6h 59m

$236

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 5/18

5:20 pm-11:19 pm

1 stop6h 59m

Lambert-St Louis

Wed 5/20

4:55 pm-11:20 am

1 stop17h 25m

$240

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 4/10

12:19 pm-11:58 pm

2 stops12h 39m

Lambert-St Louis

Mon 4/13

4:59 pm-11:20 pm

1 stop29h 21m

$248

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 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 $236. 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

5h 15m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 5h 15m
There are no direct flights from Cincinnati to St. Louis. There are no popular flight routes from Cincinnati to St. Louis.
Search flight deals

  • 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 5h 15m, 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
American AirlinesPriceFrom $218Free CancellationRating
7.1
11,378 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,245 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,304 reviews
Search Southwest flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,382 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
St. Peters
Wentzville
Collinsville
Alton
Fenton
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
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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