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Cheap flights from Cincinnati to St. Louis from $64

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 3/3. 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
3:20 pm - 10:27 pm
CVG
-
STL
8h 07m
1 stop
Frontier Logo
3:49 pm - 12:59 am
STL
-
CVG
8h 10m
1 stop
$163Frontier
Tue, Mar 3 - Thu, Mar 5
Frontier Logo
6:42 pm - 6:51 am
CVG
-
STL
37h 09m
2 stops
Frontier Logo
8:22 pm - 11:33 pm
STL
-
CVG
26h 11m
1 stop
$173Frontier
Mon, Feb 16 - Fri, Feb 27
Frontier Logo
3:20 pm - 10:27 pm
CVG
-
STL
8h 07m
1 stop
Frontier Logo
9:41 am - 9:25 pm
STL
-
CVG
10h 44m
1 stop
$175Frontier
Wed, Feb 18 - Sat, Feb 21
Frontier Logo
3:20 pm - 10:27 pm
CVG
-
STL
8h 07m
1 stop
Frontier Logo
9:41 am - 5:04 pm
STL
-
CVG
6h 23m
1 stop
$181Frontier
Tue, Feb 10 - Sat, Feb 14
Frontier Logo
5:39 pm - 10:27 pm
CVG
-
STL
29h 48m
1 stop
Frontier Logo
8:20 pm - 11:33 pm
STL
-
CVG
26h 13m
1 stop
$219Frontier
Mon, Feb 9 - Fri, Feb 13
Frontier Logo
3:20 pm - 10:27 pm
CVG
-
STL
8h 07m
1 stop
Frontier Logo
8:17 pm - 1:19 pm
STL
-
CVG
16h 02m
2 stops
$242Frontier
Tue, Feb 10 - Sat, Feb 14
Frontier Logo
9:26 pm - 10:27 pm
CVG
-
STL
26h 01m
1 stop
Frontier Logo
8:22 pm - 11:33 pm
STL
-
CVG
26h 11m
1 stop
$255Frontier
Mon, Feb 16 - Fri, Feb 27
Frontier Logo
8:15 am - 10:27 pm
CVG
-
STL
15h 12m
1 stop
Frontier Logo
9:05 pm - 12:19 am
STL
-
CVG
26h 14m
1 stop
$260Frontier
Wed, Feb 18 - Sun, Mar 22
American Airlines Logo
5:00 am - 8:35 am
CVG
-
STL
4h 35m
1 stop
American Airlines Logo
2:00 pm - 8:56 pm
STL
-
CVG
5h 56m
1 stop
$267American Airlines
Mon, Feb 16 - Tue, Feb 17
Southwest Logo
1:35 pm - 6:45 pm
CVG
-
STL
6h 10m
1 stop
Southwest Logo
7:35 am - 3:35 pm
STL
-
CVG
7h 00m
2 stops
$272Southwest
Tue, Mar 3 - Thu, Mar 5

Frontier flights from Cincinnati to St. Louis

Our best Frontier deals on Cincinnati to St. Louis flight tickets
Frontier
Mar 3
CVG3:20 pmCincinnati Cinci./N. Kentucky
8h 07m
1 stop
STL10:27 pmLambert-St Louis
Mar 5
STL3:49 pmLambert-St Louis
8h 10m
1 stop
CVG12:59 amCincinnati Cinci./N. Kentucky
$163
Frontier
Feb 16
CVG6:42 pmCincinnati Cinci./N. Kentucky
37h 09m
2 stops
STL6:51 amLambert-St Louis
Feb 27
STL8:22 pmLambert-St Louis
26h 11m
1 stop
CVG11:33 pmCincinnati Cinci./N. Kentucky
$173
Frontier
Feb 18
CVG3:20 pmCincinnati Cinci./N. Kentucky
8h 07m
1 stop
STL10:27 pmLambert-St Louis
Feb 21
STL9:41 amLambert-St Louis
10h 44m
1 stop
CVG9:25 pmCincinnati Cinci./N. Kentucky
$175

Delta flights from Cincinnati to St. Louis

Our best Delta deals on Cincinnati to St. Louis flight tickets
Delta
Mar 17
CVG1:10 pmCincinnati Cinci./N. Kentucky
4h 06m
1 stop
STL4:16 pmLambert-St Louis
Mar 20
STL6:32 amLambert-St Louis
4h 02m
1 stop
CVG11:34 amCincinnati Cinci./N. Kentucky
$303
Delta
Mar 13
CVG3:00 pmCincinnati Cinci./N. Kentucky
6h 42m
1 stop
STL8:42 pmLambert-St Louis
Mar 20
STL6:32 amLambert-St Louis
4h 02m
1 stop
CVG11:34 amCincinnati Cinci./N. Kentucky
$327

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 January 27, 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

Tue 3/3

3:20 pm-10:27 pm

1 stop8h 07m

Lambert-St Louis

Thu 3/5

3:49 pm-12:59 am

1 stop8h 10m

$163

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 2/16

6:42 pm-6:51 am

2 stops37h 09m

Lambert-St Louis

Fri 2/27

8:22 pm-11:33 pm

1 stop26h 11m

$173

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 2/18

3:20 pm-10:27 pm

1 stop8h 07m

Lambert-St Louis

Sat 2/21

9:41 am-9:25 pm

1 stop10h 44m

$175

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 2/10

3:20 pm-10:27 pm

1 stop8h 07m

Lambert-St Louis

Sat 2/14

9:41 am-5:04 pm

1 stop6h 23m

$181

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 2/9

5:39 pm-10:27 pm

1 stop29h 48m

Lambert-St Louis

Fri 2/13

8:20 pm-11:33 pm

1 stop26h 13m

$219

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 2/10

3:20 pm-10:27 pm

1 stop8h 07m

Lambert-St Louis

Sat 2/14

8:17 pm-1:19 pm

2 stops16h 02m

$242

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 2/16

9:26 pm-10:27 pm

1 stop26h 01m

Lambert-St Louis

Fri 2/27

8:22 pm-11:33 pm

1 stop26h 11m

$255

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 2/18

8:15 am-10:27 pm

1 stop15h 12m

Lambert-St Louis

Sun 3/22

9:05 pm-12:19 am

1 stop26h 14m

$260

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 2/16

5:00 am-8:35 am

1 stop4h 35m

Lambert-St Louis

Tue 2/17

2:00 pm-8:56 pm

1 stop5h 56m

$267

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 3/3

1:35 pm-6:45 pm

1 stop6h 10m

Lambert-St Louis

Thu 3/5

7:35 am-3:35 pm

2 stops7h 00m

$272

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 $298.

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 58m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 3h 58m
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 3h 58m, 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
5.7
3,056 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.2
11,197 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,118 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,268 reviews
Search Southwest flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,205 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
Florissant
O'Fallon
Collinsville
Fenton
St. Peters
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Glencoe
Litchfield
Shrewsbury

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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