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Cheap flights from Cincinnati to St. Louis from $62

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 2/18. 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
2:27 pm - 10:34 pm
CVG
-
STL
9h 07m1 stop
Frontier Logo
12:12 pm - 10:20 pm
STL
-
CVG
9h 08m1 stop
$145Frontier
Sat, Jan 17 - Sat, Jan 24
Frontier Logo
9:00 am - 10:33 pm
CVG
-
STL
14h 33m1 stop
Frontier Logo
5:11 pm - 8:24 pm
STL
-
CVG
26h 13m1 stop
$162Frontier
Sat, Jan 10 - Wed, Jan 14
Frontier Logo
1:45 pm - 2:46 pm
CVG
-
STL
26h 01m1 stop
Frontier Logo
5:42 pm - 3:03 pm
STL
-
CVG
20h 21m1 stop
$163Frontier
Fri, Jan 23 - Fri, Jan 30
Frontier Logo
2:27 pm - 10:34 pm
CVG
-
STL
9h 07m1 stop
Frontier Logo
12:12 pm - 10:20 pm
STL
-
CVG
9h 08m1 stop
$164Frontier
Sat, Jan 17 - Sat, Jan 24
Frontier Logo
11:57 am - 10:33 pm
CVG
-
STL
11h 36m1 stop
Frontier Logo
1:07 pm - 11:38 pm
STL
-
CVG
9h 31m1 stop
$183Frontier
Mon, Jan 5 - Thu, Jan 8
Frontier Logo
7:00 am - 11:11 am
CVG
-
STL
29h 11m1 stop
Frontier Logo
5:42 pm - 9:25 pm
STL
-
CVG
26h 43m1 stop
$197Frontier
Fri, Feb 6 - Mon, Feb 9
Frontier Logo
5:39 pm - 2:46 pm
CVG
-
STL
22h 07m2 stops
Frontier Logo
5:42 pm - 3:03 pm
STL
-
CVG
20h 21m1 stop
$209Frontier
Fri, Jan 23 - Fri, Jan 30
Frontier Logo
11:57 am - 10:33 pm
CVG
-
STL
11h 36m1 stop
Frontier Logo
1:35 pm - 12:29 am
STL
-
CVG
9h 54m1 stop
$213Frontier
Mon, Jan 12 - Thu, Jan 15
Frontier Logo
7:00 am - 11:33 pm
CVG
-
STL
17h 33m1 stop
Frontier Logo
3:49 pm - 9:25 pm
STL
-
CVG
28h 36m1 stop
$216Frontier
Fri, Feb 6 - Tue, Feb 10
Frontier Logo
5:39 pm - 2:46 pm
CVG
-
STL
22h 07m2 stops
Frontier Logo
3:49 pm - 9:25 pm
STL
-
CVG
28h 36m1 stop
$223Frontier
Fri, Feb 6 - Tue, Feb 10

United Airlines flights from Cincinnati to St. Louis

Our best United Airlines deals on Cincinnati to St. Louis flight tickets
United Airlines
Apr 18
CVG8:30 amCincinnati Cinci./N. Kentucky
4h 52m
1 stop
STL12:22 pmLambert-St Louis
Apr 28
STL9:10 amLambert-St Louis
5h 15m
1 stop
CVG3:25 pmCincinnati Cinci./N. Kentucky
$322
Find similar
United Airlines
Jan 9
CVG11:15 amCincinnati Cinci./N. Kentucky
4h 15m
1 stop
STL2:30 pmLambert-St Louis
Jan 12
STL11:20 amLambert-St Louis
4h 23m
1 stop
CVG4:43 pmCincinnati Cinci./N. Kentucky
$499
Find similar
United Airlines
Feb 14
CVG11:17 amCincinnati Cinci./N. Kentucky
5h 45m
1 stop
STL4:02 pmLambert-St Louis
Feb 20
STL6:25 amLambert-St Louis
6h 55m
2 stops
CVG2:20 pmCincinnati Cinci./N. Kentucky
$631
Find similar

Frontier flights from Cincinnati to St. Louis

Our best Frontier deals on Cincinnati to St. Louis flight tickets
Frontier
Jan 17
CVG2:27 pmCincinnati Cinci./N. Kentucky
9h 07m
1 stop
STL10:34 pmLambert-St Louis
Jan 24
STL12:12 pmLambert-St Louis
9h 08m
1 stop
CVG10:20 pmCincinnati Cinci./N. Kentucky
$145
Find similar
Frontier
Jan 10
CVG9:00 amCincinnati Cinci./N. Kentucky
14h 33m
1 stop
STL10:33 pmLambert-St Louis
Jan 14
STL5:11 pmLambert-St Louis
26h 13m
1 stop
CVG8:24 pmCincinnati Cinci./N. Kentucky
$162
Find similar
Frontier
Jan 23
CVG1:45 pmCincinnati Cinci./N. Kentucky
26h 01m
1 stop
STL2:46 pmLambert-St Louis
Jan 30
STL5:42 pmLambert-St Louis
20h 21m
1 stop
CVG3:03 pmCincinnati Cinci./N. Kentucky
$163
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 December 27, 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

Sat 1/17

2:27 pm-10:34 pm

1 stop9h 07m

Lambert-St Louis

Sat 1/24

12:12 pm-10:20 pm

1 stop9h 08m

$145

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/10

9:00 am-10:33 pm

1 stop14h 33m

Lambert-St Louis

Wed 1/14

5:11 pm-8:24 pm

1 stop26h 13m

$162

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 1/23

1:45 pm-2:46 pm

1 stop26h 01m

Lambert-St Louis

Fri 1/30

5:42 pm-3:03 pm

1 stop20h 21m

$163

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/17

2:27 pm-10:34 pm

1 stop9h 07m

Lambert-St Louis

Sat 1/24

12:12 pm-10:20 pm

1 stop9h 08m

$164

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 1/5

11:57 am-10:33 pm

1 stop11h 36m

Lambert-St Louis

Thu 1/8

1:07 pm-11:38 pm

1 stop9h 31m

$183

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 2/6

7:00 am-11:11 am

1 stop29h 11m

Lambert-St Louis

Mon 2/9

5:42 pm-9:25 pm

1 stop26h 43m

$197

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 1/23

5:39 pm-2:46 pm

2 stops22h 07m

Lambert-St Louis

Fri 1/30

5:42 pm-3:03 pm

1 stop20h 21m

$209

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 1/12

11:57 am-10:33 pm

1 stop11h 36m

Lambert-St Louis

Thu 1/15

1:35 pm-12:29 am

1 stop9h 54m

$213

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 2/6

7:00 am-11:33 pm

1 stop17h 33m

Lambert-St Louis

Tue 2/10

3:49 pm-9:25 pm

1 stop28h 36m

$216

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 2/6

5:39 pm-2:46 pm

2 stops22h 07m

Lambert-St Louis

Tue 2/10

3:49 pm-9:25 pm

1 stop28h 36m

$223

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 $300.

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 December 2025, prices for Cincinnati to St. Louis flights are approximately 40% 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

Fastest flight time

4h 05m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 4h 05m
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 4h 05m, 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
5.8
3,071 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.2
11,068 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,018 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,258 reviews
Search Southwest flights
United AirlinesPriceFrom $262Free CancellationRating
7.4
9,116 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
Fenton
St. Peters
Wentzville
Collinsville
Alton
Farmington
Clayton
Festus
Glencoe
Eureka
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.

An easier way to manage your St. Louis trip

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