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Cheap flights from Cincinnati to St. Louis from $59

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 6/4. 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
12:24 pm - 8:52 am
CVG
-
STL
21h 28m
1 stop
Frontier Logo
5:06 pm - 11:14 am
STL
-
CVG
17h 08m
1 stop
$123Frontier
Sun, Jun 14 - Wed, Jun 17
Frontier Logo
12:12 pm - 5:33 pm
CVG
-
STL
6h 21m
1 stop
Frontier Logo
5:27 pm - 11:41 am
STL
-
CVG
17h 14m
1 stop
$124Frontier
Thu, Jun 4 - Fri, Jun 5
Frontier Logo
12:27 pm - 8:57 am
CVG
-
STL
21h 30m
1 stop
Frontier Logo
6:33 pm - 11:48 am
STL
-
CVG
16h 15m
1 stop
$126Frontier
Tue, Jul 7 - Thu, Jul 9
Frontier Logo
12:54 pm - 8:52 am
CVG
-
STL
20h 58m
1 stop
Frontier Logo
5:06 pm - 11:47 am
STL
-
CVG
17h 41m
1 stop
$150Frontier
Fri, Jun 12 - Fri, Jun 19
Frontier Logo
12:12 pm - 8:55 am
CVG
-
STL
21h 43m
1 stop
Frontier Logo
6:33 pm - 11:41 am
STL
-
CVG
16h 08m
1 stop
$152Frontier
Tue, Jun 2 - Thu, Jun 4
Frontier Logo
2:20 pm - 8:52 am
CVG
-
STL
43h 32m
2 stops
Frontier Logo
5:06 pm - 11:14 am
STL
-
CVG
17h 08m
1 stop
$169Frontier
Wed, Jun 10 - Wed, Jun 17
Frontier Logo
2:20 pm - 5:30 pm
CVG
-
STL
28h 10m
2 stops
Frontier Logo
5:06 pm - 11:14 am
STL
-
CVG
17h 08m
1 stop
$171Frontier
Wed, Jun 10 - Wed, Jun 17
Frontier Logo
12:24 pm - 5:30 pm
CVG
-
STL
6h 06m
1 stop
Frontier Logo
5:06 pm - 1:25 pm
STL
-
CVG
19h 19m
2 stops
$172Frontier
Tue, Jun 9 - Mon, Jun 15
Frontier Logo
2:20 pm - 5:30 pm
CVG
-
STL
28h 10m
2 stops
Frontier Logo
5:06 pm - 11:14 am
STL
-
CVG
17h 08m
1 stop
$189Frontier
Wed, Jun 10 - Mon, Jun 15
Frontier Logo
12:12 pm - 8:55 am
CVG
-
STL
21h 43m
1 stop
Frontier Logo
6:31 pm - 11:49 am
STL
-
CVG
16h 18m
1 stop
$195Frontier
Thu, Jun 4 - Thu, Jun 11

Frontier flights from Cincinnati to St. Louis

Our best Frontier deals on Cincinnati to St. Louis flight tickets
Frontier
Jun 14
CVG12:24 pmCincinnati Cinci./N. Kentucky
21h 28m
1 stop
STL8:52 amLambert-St Louis
Jun 17
STL5:06 pmLambert-St Louis
17h 08m
1 stop
CVG11:14 amCincinnati Cinci./N. Kentucky
$123
Frontier
Jun 4
CVG12:12 pmCincinnati Cinci./N. Kentucky
6h 21m
1 stop
STL5:33 pmLambert-St Louis
Jun 5
STL5:27 pmLambert-St Louis
17h 14m
1 stop
CVG11:41 amCincinnati Cinci./N. Kentucky
$124
Frontier
Jul 7
CVG12:27 pmCincinnati Cinci./N. Kentucky
21h 30m
1 stop
STL8:57 amLambert-St Louis
Jul 9
STL6:33 pmLambert-St Louis
16h 15m
1 stop
CVG11:48 amCincinnati Cinci./N. Kentucky
$126

Southwest flights from Cincinnati to St. Louis

Our best Southwest deals on Cincinnati to St. Louis flight tickets
Southwest
Jul 7
CVG7:00 amCincinnati Cinci./N. Kentucky
8h 50m
2 stops
STL2:50 pmLambert-St Louis
Jul 9
STL4:35 pmLambert-St Louis
6h 50m
2 stops
CVG12:25 amCincinnati Cinci./N. Kentucky
$325
Southwest
May 28
CVG5:45 amCincinnati Cinci./N. Kentucky
10h 10m
2 stops
STL2:55 pmLambert-St Louis
May 29
STL4:00 pmLambert-St Louis
6h 25m
1 stop
CVG11:25 pmCincinnati Cinci./N. Kentucky
$328
Southwest
Jun 3
CVG7:05 amCincinnati Cinci./N. Kentucky
9h 05m
2 stops
STL3:10 pmLambert-St Louis
Jun 6
STL2:10 pmLambert-St Louis
8h 55m
2 stops
CVG12:05 amCincinnati Cinci./N. Kentucky
$331

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 16, 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

Sun 6/14

12:24 pm-8:52 am

1 stop21h 28m

Lambert-St Louis

Wed 6/17

5:06 pm-11:14 am

1 stop17h 08m

$123
Quickest round-trip

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 6/4

12:12 pm-5:33 pm

1 stop6h 21m

Lambert-St Louis

Fri 6/5

5:27 pm-11:41 am

1 stop17h 14m

$124

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 7/7

12:27 pm-8:57 am

1 stop21h 30m

Lambert-St Louis

Thu 7/9

6:33 pm-11:48 am

1 stop16h 15m

$126

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 6/12

12:54 pm-8:52 am

1 stop20h 58m

Lambert-St Louis

Fri 6/19

5:06 pm-11:47 am

1 stop17h 41m

$150

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 6/2

12:12 pm-8:55 am

1 stop21h 43m

Lambert-St Louis

Thu 6/4

6:33 pm-11:41 am

1 stop16h 08m

$152

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 6/10

2:20 pm-8:52 am

2 stops43h 32m

Lambert-St Louis

Wed 6/17

5:06 pm-11:14 am

1 stop17h 08m

$169

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 6/10

2:20 pm-5:30 pm

2 stops28h 10m

Lambert-St Louis

Wed 6/17

5:06 pm-11:14 am

1 stop17h 08m

$171

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 6/9

12:24 pm-5:30 pm

1 stop6h 06m

Lambert-St Louis

Mon 6/15

5:06 pm-1:25 pm

2 stops19h 19m

$172

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 6/10

2:20 pm-5:30 pm

2 stops28h 10m

Lambert-St Louis

Mon 6/15

5:06 pm-11:14 am

1 stop17h 08m

$189

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 6/4

12:12 pm-8:55 am

1 stop21h 43m

Lambert-St Louis

Thu 6/11

6:31 pm-11:49 am

1 stop16h 18m

$195

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 36m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 3h 36m
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 36m, 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
2,950 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,456 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,292 reviews
Search Southwest flights
United AirlinesPriceFrom $259Free CancellationRating
7.4
9,731 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
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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