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Cheap flights from Cincinnati to St. Louis from $73

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 9/22. 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
0 bags

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Cheap round-trip flights

Frontier Logo
3:52 pm - 3:04 pmCVG-STL
24h 12m1 stop
Frontier Logo
10:39 am - 12:27 amSTL-CVG
12h 48m1 stop
$160Frontier
Find Deal
mié., sep. 17 - dom., sep. 21
Frontier Logo
3:20 pm - 9:06 amCVG-STL
18h 46m1 stop
Frontier Logo
10:39 am - 12:27 amSTL-CVG
12h 48m1 stop
$163Frontier
Find Deal
vie., sep. 5 - dom., sep. 7
Frontier Logo
3:58 pm - 9:06 amCVG-STL
18h 08m2 stops
Frontier Logo
1:57 pm - 12:57 amSTL-CVG
10h 00m1 stop
$186Frontier
Find Deal
vie., sep. 12 - lun., sep. 15
Delta Logo
12:09 pm - 4:37 pmCVG-STL
5h 28m1 stop
Delta Logo
5:11 pm - 11:56 pmSTL-CVG
5h 45m1 stop
$197Delta
Find Deal
mié., sep. 17 - sáb., sep. 20
Southwest Logo
4:35 pm - 11:25 pmCVG-STL
7h 50m1 stop
Southwest Logo
8:20 am - 10:05 pmSTL-CVG
12h 45m2 stops
$208Southwest
Find Deal
jue., sep. 18 - sáb., sep. 20
Delta Logo
2:30 pm - 7:07 pmCVG-STL
5h 37m1 stop
Delta Logo
5:25 pm - 11:06 pmSTL-CVG
4h 41m1 stop
$237Delta
Find Deal
sáb., ago. 30 - dom., ago. 31
Southwest Logo
1:15 pm - 8:00 pmCVG-STL
7h 45m2 stops
Southwest Logo
4:35 pm - 12:05 amSTL-CVG
6h 30m2 stops
$292Southwest
Find Deal
mar., sep. 30 - lun., oct. 6
United Airlines Logo
5:30 pm - 11:44 pmCVG-STL
7h 14m1 stop
United Airlines Logo
8:15 am - 2:11 pmSTL-CVG
4h 56m1 stop
$368United Airlines
Find Deal
lun., sep. 22 - mié., sep. 24
United Airlines Logo
6:31 pm - 11:44 pmCVG-STL
6h 13m1 stop
United Airlines Logo
5:30 pm - 10:26 pmSTL-CVG
3h 56m1 stop
$372United Airlines
Find Deal
sáb., ago. 30 - mié., sep. 3
American Airlines Logo
8:36 am - 11:58 amCVG-STL
4h 22m1 stop
American Airlines Logo
4:41 pm - 8:59 pmSTL-CVG
3h 18m1 stop
$568American Airlines
Find Deal
jue., dic. 18 - dom., dic. 21

Frontier flights from Cincinnati to St. Louis

Our best Frontier deals on Cincinnati to St. Louis flight tickets
Frontier
Sep 17
CVG3:52 pmCincinnati Cinci./N. Kentucky
24h 12m
1 stop
STL3:04 pmLambert-St Louis
Sep 21
STL10:39 amLambert-St Louis
12h 48m
1 stop
CVG12:27 amCincinnati Cinci./N. Kentucky
$160
Find similar
Frontier
Sep 5
CVG3:20 pmCincinnati Cinci./N. Kentucky
18h 46m
1 stop
STL9:06 amLambert-St Louis
Sep 7
STL10:39 amLambert-St Louis
12h 48m
1 stop
CVG12:27 amCincinnati Cinci./N. Kentucky
$163
Find similar
Frontier
Aug 22
CVG5:42 pmCincinnati Cinci./N. Kentucky
20h 51m
1 stop
STL1:33 pmLambert-St Louis
Aug 24
STL10:17 amLambert-St Louis
22h 08m
1 stop
CVG9:25 amCincinnati Cinci./N. Kentucky
$175
Find similar

Delta flights from Cincinnati to St. Louis

Our best Delta deals on Cincinnati to St. Louis flight tickets
Delta
Sep 17
CVG12:09 pmCincinnati Cinci./N. Kentucky
5h 28m
1 stop
STL4:37 pmLambert-St Louis
Sep 20
STL5:11 pmLambert-St Louis
5h 45m
1 stop
CVG11:56 pmCincinnati Cinci./N. Kentucky
$197
Find similar
Delta
Aug 30
CVG2:30 pmCincinnati Cinci./N. Kentucky
5h 37m
1 stop
STL7:07 pmLambert-St Louis
Aug 31
STL5:25 pmLambert-St Louis
4h 41m
1 stop
CVG11:06 pmCincinnati Cinci./N. Kentucky
$237
Find similar
Delta
Sep 30
CVG6:00 amCincinnati Cinci./N. Kentucky
4h 59m
1 stop
STL9:59 amLambert-St Louis
Oct 6
STL6:52 pmLambert-St Louis
4h 07m
1 stop
CVG11:59 pmCincinnati Cinci./N. Kentucky
$241
Find similar

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 agosto 17, 2025.
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

mié. 9/17

3:52 pm-3:04 pm

1 stop24h 12m

Lambert-St Louis

dom. 9/21

10:39 am-12:27 am

1 stop12h 48m

$160

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

vie. 9/5

3:20 pm-9:06 am

1 stop18h 46m

Lambert-St Louis

dom. 9/7

10:39 am-12:27 am

1 stop12h 48m

$163

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

vie. 9/12

3:58 pm-9:06 am

2 stops18h 08m

Lambert-St Louis

lun. 9/15

1:57 pm-12:57 am

1 stop10h 00m

$186

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

mié. 9/17

12:09 pm-4:37 pm

1 stop5h 28m

Lambert-St Louis

sáb. 9/20

5:11 pm-11:56 pm

1 stop5h 45m

$197

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

jue. 9/18

4:35 pm-11:25 pm

1 stop7h 50m

Lambert-St Louis

sáb. 9/20

8:20 am-10:05 pm

2 stops12h 45m

$208

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

sáb. 8/30

2:30 pm-7:07 pm

1 stop5h 37m

Lambert-St Louis

dom. 8/31

5:25 pm-11:06 pm

1 stop4h 41m

$237

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

mar. 9/30

1:15 pm-8:00 pm

2 stops7h 45m

Lambert-St Louis

lun. 10/6

4:35 pm-12:05 am

2 stops6h 30m

$292

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

lun. 9/22

5:30 pm-11:44 pm

1 stop7h 14m

Lambert-St Louis

mié. 9/24

8:15 am-2:11 pm

1 stop4h 56m

$368

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

sáb. 8/30

6:31 pm-11:44 pm

1 stop6h 13m

Lambert-St Louis

mié. 9/3

5:30 pm-10:26 pm

1 stop3h 56m

$372

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

jue. 12/18

8:36 am-11:58 am

1 stop4h 22m

Lambert-St Louis

dom. 12/21

4:41 pm-8:59 pm

1 stop3h 18m

$568

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 $276. The month of December is another great option to travel to St. Louis, with average flight prices from Cincinnati averaging around $296.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $296. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $429. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Cincinnati in the evening is the least expensive time of day to depart. momondo users have found prices as low as $308 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $426 per ticket.

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

As of August 2025, prices for Cincinnati to St. Louis flights are approximately 0% more expensive when compared to flights at the same time last year.

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

Best Price Found

$73

Fastest flight time

3h 30m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Cincinnati in the past 72 hours is $73. The best round-trip flight deal from Cincinnati to St. Louis found on momondo in the last 72 hours is $160.
The fastest flight from Cincinnati to St. Louis takes 3h 30m
There are no direct flights from Cincinnati to St. Louis. Popular non-direct route for this connection is Cincinnati Cinci./N. Kentucky Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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 30m, 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 $112Free CancellationRating
5.8
3,212 reviews
Search Frontier flights
American AirlinesPriceFrom $219Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $239Free CancellationRating
8.0
7,986 reviews
Search Delta flights
United AirlinesPriceFrom $262Free CancellationRating
7.4
8,919 reviews
Search United Airlines flights
SouthwestPriceFrom $297Free CancellationRating
8.0
4,246 reviews
Search Southwest 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
Florissant
O'Fallon
Fenton
Wentzville
Collinsville
Alton
St. Peters
Farmington
Festus
Glencoe
Eureka
Clayton
Edwardsville
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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