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Cheap flights from Cincinnati to St. Louis from $65

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 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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
5:20 pm - 11:19 pm
CVG
-
STL
6h 59m
1 stop
Frontier Logo
11:28 am - 6:16 pm
STL
-
CVG
5h 48m
1 stop
$140Frontier
Fri, May 1 - Sun, May 3
Frontier Logo
10:00 am - 11:19 pm
CVG
-
STL
14h 19m
1 stop
Frontier Logo
11:21 am - 6:05 pm
STL
-
CVG
5h 44m
1 stop
$160Frontier
Tue, Apr 28 - Thu, Apr 30
Frontier Logo
12:12 pm - 5:33 pm
CVG
-
STL
6h 21m
1 stop
Frontier Logo
11:38 am - 11:38 pm
STL
-
CVG
11h 00m
1 stop
$180Frontier
Thu, May 28 - Mon, Jun 1
Frontier Logo
5:20 pm - 11:19 pm
CVG
-
STL
6h 59m
1 stop
Frontier Logo
11:28 am - 6:16 pm
STL
-
CVG
5h 48m
1 stop
$181Frontier
Fri, May 1 - Sun, May 3
Frontier Logo
12:12 pm - 5:33 pm
CVG
-
STL
6h 21m
1 stop
Frontier Logo
5:27 pm - 11:14 am
STL
-
CVG
16h 47m
1 stop
$182Frontier
Thu, Jun 4 - Mon, Jun 8
Frontier Logo
4:26 pm - 11:19 pm
CVG
-
STL
7h 53m
1 stop
Frontier Logo
8:08 pm - 10:44 am
STL
-
CVG
13h 36m
1 stop
$185Frontier
Sat, May 2 - Sat, May 9
Frontier Logo
10:00 am - 11:19 pm
CVG
-
STL
14h 19m
1 stop
Frontier Logo
8:06 pm - 7:12 pm
STL
-
CVG
22h 06m
1 stop
$195Frontier
Mon, Apr 20 - Thu, Apr 23
Frontier Logo
6:00 am - 11:19 pm
CVG
-
STL
18h 19m
1 stop
Frontier Logo
4:59 pm - 3:52 pm
STL
-
CVG
21h 53m
1 stop
$196Frontier
Fri, Apr 17 - Tue, Apr 21
Frontier Logo
7:46 pm - 11:19 pm
CVG
-
STL
28h 33m
2 stops
Frontier Logo
5:27 pm - 11:04 am
STL
-
CVG
16h 37m
1 stop
$197Frontier
Sat, May 2 - Sat, May 9
Frontier Logo
10:00 am - 11:19 pm
CVG
-
STL
14h 19m
1 stop
Frontier Logo
6:41 pm - 11:41 am
STL
-
CVG
16h 00m
1 stop
$200Frontier
Tue, Apr 28 - Tue, May 5

Frontier flights from Cincinnati to St. Louis

Our best Frontier deals on Cincinnati to St. Louis flight tickets
Frontier
May 1
CVG5:20 pmCincinnati Cinci./N. Kentucky
6h 59m
1 stop
STL11:19 pmLambert-St Louis
May 3
STL11:28 amLambert-St Louis
5h 48m
1 stop
CVG6:16 pmCincinnati Cinci./N. Kentucky
$140
Frontier
Apr 28
CVG10:00 amCincinnati Cinci./N. Kentucky
14h 19m
1 stop
STL11:19 pmLambert-St Louis
Apr 30
STL11:21 amLambert-St Louis
5h 44m
1 stop
CVG6:05 pmCincinnati Cinci./N. Kentucky
$160
Frontier
May 28
CVG12:12 pmCincinnati Cinci./N. Kentucky
6h 21m
1 stop
STL5:33 pmLambert-St Louis
Jun 1
STL11:38 amLambert-St Louis
11h 00m
1 stop
CVG11:38 pmCincinnati Cinci./N. Kentucky
$180

Southwest flights from Cincinnati to St. Louis

Our best Southwest deals on Cincinnati to St. Louis flight tickets
Southwest
Apr 21
CVG8:35 amCincinnati Cinci./N. Kentucky
3h 55m
1 stop
STL11:30 amLambert-St Louis
Apr 21
STL1:45 pmLambert-St Louis
5h 35m
1 stop
CVG8:20 pmCincinnati Cinci./N. Kentucky
$275
Southwest
Apr 21
CVG8:35 amCincinnati Cinci./N. Kentucky
3h 55m
1 stop
STL11:30 amLambert-St Louis
Apr 21
STL1:15 pmLambert-St Louis
7h 00m
2 stops
CVG9:15 pmCincinnati Cinci./N. Kentucky
$280
Southwest
Apr 28
CVG7:05 amCincinnati Cinci./N. Kentucky
9h 10m
2 stops
STL3:15 pmLambert-St Louis
May 5
STL5:35 amLambert-St Louis
6h 05m
2 stops
CVG12:40 pmCincinnati Cinci./N. Kentucky
$285

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 April 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

Cheapest round-trip
Quickest round-trip

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 5/1

5:20 pm-11:19 pm

1 stop6h 59m

Lambert-St Louis

Sun 5/3

11:28 am-6:16 pm

1 stop5h 48m

$140

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 4/28

10:00 am-11:19 pm

1 stop14h 19m

Lambert-St Louis

Thu 4/30

11:21 am-6:05 pm

1 stop5h 44m

$160

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 5/28

12:12 pm-5:33 pm

1 stop6h 21m

Lambert-St Louis

Mon 6/1

11:38 am-11:38 pm

1 stop11h 00m

$180

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 5/1

5:20 pm-11:19 pm

1 stop6h 59m

Lambert-St Louis

Sun 5/3

11:28 am-6:16 pm

1 stop5h 48m

$181

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 6/4

12:12 pm-5:33 pm

1 stop6h 21m

Lambert-St Louis

Mon 6/8

5:27 pm-11:14 am

1 stop16h 47m

$182

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 5/2

4:26 pm-11:19 pm

1 stop7h 53m

Lambert-St Louis

Sat 5/9

8:08 pm-10:44 am

1 stop13h 36m

$185

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 4/20

10:00 am-11:19 pm

1 stop14h 19m

Lambert-St Louis

Thu 4/23

8:06 pm-7:12 pm

1 stop22h 06m

$195

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 4/17

6:00 am-11:19 pm

1 stop18h 19m

Lambert-St Louis

Tue 4/21

4:59 pm-3:52 pm

1 stop21h 53m

$196

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 5/2

7:46 pm-11:19 pm

2 stops28h 33m

Lambert-St Louis

Sat 5/9

5:27 pm-11:04 am

1 stop16h 37m

$197

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 4/28

10:00 am-11:19 pm

1 stop14h 19m

Lambert-St Louis

Tue 5/5

6:41 pm-11:41 am

1 stop16h 00m

$200

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 $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

4h 39m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 4h 39m
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 4h 39m, 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
11,555 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,383 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,343 reviews
Search Southwest flights
United AirlinesPriceFrom $259Free CancellationRating
7.4
9,541 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
Clayton
Festus
Eureka
Edwardsville
Litchfield
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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