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Cheap flights from Cincinnati to St. Louis from $55

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 1/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

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Frontier Logo
1:22 pm - 6:51 amCVG-STL
18h 29m1 stop
Frontier Logo
12:06 pm - 10:20 pmSTL-CVG
9h 14m1 stop
$166Frontier
Find Deal
Fri, Jan 23 - Sat, Jan 24
Frontier Logo
1:22 pm - 11:33 pmCVG-STL
11h 11m2 stops
Frontier Logo
12:06 pm - 10:20 pmSTL-CVG
9h 14m1 stop
$174Frontier
Find Deal
Fri, Jan 23 - Sat, Jan 24
Frontier Logo
11:57 am - 10:33 pmCVG-STL
11h 36m1 stop
Frontier Logo
7:43 pm - 1:13 pmSTL-CVG
16h 30m1 stop
$175Frontier
Find Deal
Mon, Dec 8 - Wed, Dec 10
Frontier Logo
6:00 am - 10:33 pmCVG-STL
17h 33m2 stops
Frontier Logo
7:43 pm - 1:13 pmSTL-CVG
16h 30m1 stop
$186Frontier
Find Deal
Mon, Dec 8 - Wed, Dec 10
Frontier Logo
8:05 am - 10:33 pmCVG-STL
15h 28m1 stop
Frontier Logo
5:11 pm - 12:42 amSTL-CVG
6h 31m1 stop
$236Frontier
Find Deal
Sat, Feb 28 - Mon, Mar 2
Frontier Logo
8:55 pm - 8:59 amCVG-STL
13h 04m1 stop
Frontier Logo
1:16 pm - 11:58 pmSTL-CVG
9h 42m1 stop
$240Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Delta Logo
6:00 pm - 11:39 pmCVG-STL
6h 39m1 stop
Delta Logo
5:33 pm - 11:58 pmSTL-CVG
5h 25m1 stop
$257Delta
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Sat, Jan 17 - Sat, Jan 24
American Airlines Logo
8:54 am - 3:04 pmCVG-STL
7h 10m1 stop
American Airlines Logo
1:40 pm - 11:45 pmSTL-CVG
9h 05m2 stops
$262American Airlines
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Sat, Jan 17 - Sat, Jan 24
Southwest Logo
7:00 am - 12:45 pmCVG-STL
6h 45m2 stops
Southwest Logo
8:15 am - 5:35 pmSTL-CVG
8h 20m2 stops
$267Southwest
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Tue, Feb 24 - Wed, Feb 25
Southwest Logo
2:35 pm - 11:10 pmCVG-STL
9h 35m2 stops
Southwest Logo
12:05 pm - 4:10 pmSTL-CVG
3h 05m1 stop
$297Southwest
Find Deal
Sat, Feb 28 - Mon, Mar 2

American Airlines flights from Cincinnati to St. Louis

Our best American Airlines deals on Cincinnati to St. Louis flight tickets
American Airlines
Jan 17
CVG8:54 amCincinnati Cinci./N. Kentucky
7h 10m
1 stop
STL3:04 pmLambert-St Louis
Jan 24
STL1:40 pmLambert-St Louis
9h 05m
2 stops
CVG11:45 pmCincinnati Cinci./N. Kentucky
$262
Find similar
American Airlines
Nov 21
CVG6:45 amCincinnati Cinci./N. Kentucky
7h 58m
1 stop
STL1:43 pmLambert-St Louis
Dec 22
STL5:16 pmLambert-St Louis
3h 55m
1 stop
CVG10:11 pmCincinnati Cinci./N. Kentucky
$397
Find similar
American Airlines
Nov 28
CVG12:57 pmCincinnati Cinci./N. Kentucky
4h 19m
1 stop
STL4:16 pmLambert-St Louis
Dec 1
STL4:46 pmLambert-St Louis
4h 09m
1 stop
CVG9:55 pmCincinnati Cinci./N. Kentucky
$512
Find similar

Southwest flights from Cincinnati to St. Louis

Our best Southwest deals on Cincinnati to St. Louis flight tickets
Southwest
Feb 24
CVG7:00 amCincinnati Cinci./N. Kentucky
6h 45m
2 stops
STL12:45 pmLambert-St Louis
Feb 25
STL8:15 amLambert-St Louis
8h 20m
2 stops
CVG5:35 pmCincinnati Cinci./N. Kentucky
$267
Find similar
Southwest
Feb 28
CVG2:35 pmCincinnati Cinci./N. Kentucky
9h 35m
2 stops
STL11:10 pmLambert-St Louis
Mar 2
STL12:05 pmLambert-St Louis
3h 05m
1 stop
CVG4:10 pmCincinnati Cinci./N. Kentucky
$297
Find similar
Southwest
Feb 28
CVG2:35 pmCincinnati Cinci./N. Kentucky
9h 35m
2 stops
STL11:10 pmLambert-St Louis
Mar 2
STL9:40 amLambert-St Louis
7h 30m
2 stops
CVG6:10 pmCincinnati Cinci./N. Kentucky
$302
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 November 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

Fri 1/23

1:22 pm-6:51 am

1 stop18h 29m

Lambert-St Louis

Sat 1/24

12:06 pm-10:20 pm

1 stop9h 14m

$166

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 1/23

1:22 pm-11:33 pm

2 stops11h 11m

Lambert-St Louis

Sat 1/24

12:06 pm-10:20 pm

1 stop9h 14m

$174

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 12/8

11:57 am-10:33 pm

1 stop11h 36m

Lambert-St Louis

Wed 12/10

7:43 pm-1:13 pm

1 stop16h 30m

$175

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 12/8

6:00 am-10:33 pm

2 stops17h 33m

Lambert-St Louis

Wed 12/10

7:43 pm-1:13 pm

1 stop16h 30m

$186

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 2/28

8:05 am-10:33 pm

1 stop15h 28m

Lambert-St Louis

Mon 3/2

5:11 pm-12:42 am

1 stop6h 31m

$236

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 12/4

8:55 pm-8:59 am

1 stop13h 04m

Lambert-St Louis

Sun 12/7

1:16 pm-11:58 pm

1 stop9h 42m

$240

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/17

6:00 pm-11:39 pm

1 stop6h 39m

Lambert-St Louis

Sat 1/24

5:33 pm-11:58 pm

1 stop5h 25m

$257

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/17

8:54 am-3:04 pm

1 stop7h 10m

Lambert-St Louis

Sat 1/24

1:40 pm-11:45 pm

2 stops9h 05m

$262

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 2/24

7:00 am-12:45 pm

2 stops6h 45m

Lambert-St Louis

Wed 2/25

8:15 am-5:35 pm

2 stops8h 20m

$267

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 2/28

2:35 pm-11:10 pm

2 stops9h 35m

Lambert-St Louis

Mon 3/2

12:05 pm-4:10 pm

1 stop3h 05m

$297

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 November 2025, prices for Cincinnati to St. Louis flights are approximately 61% 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

Direct flights

None
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 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
3,103 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
United AirlinesPriceFrom $262Free CancellationRating
7.4
9,014 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
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
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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