Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Cincinnati to St. Louis

Cheap round-trip flights

Frontier Logo
5:20 am - 1:02 pmCVG-STL
8h 42m1 stop
Frontier Logo
10:49 am - 11:59 pmSTL-CVG
12h 10m1 stop
$159Frontier
Find Deal
Mon, Sep 29 - Thu, Oct 2
Frontier Logo
6:05 am - 9:07 amCVG-STL
28h 02m1 stop
Frontier Logo
7:45 pm - 1:39 amSTL-CVG
28h 54m1 stop
$205Frontier
Find Deal
Wed, Oct 29 - Wed, Nov 5
Frontier Logo
9:30 pm - 5:27 pmCVG-STL
20h 57m2 stops
Frontier Logo
7:45 pm - 1:39 amSTL-CVG
28h 54m1 stop
$226Frontier
Find Deal
Wed, Oct 29 - Wed, Nov 5
Delta Logo
10:01 am - 4:07 pmCVG-STL
7h 06m1 stop
Delta Logo
7:05 am - 2:16 pmSTL-CVG
6h 11m1 stop
$237Delta
Find Deal
Tue, Dec 2 - Wed, Dec 3
American Airlines Logo
7:16 am - 4:36 pmCVG-STL
10h 20m1 stop
American Airlines Logo
6:45 pm - 11:58 pmSTL-CVG
4h 13m1 stop
$239American Airlines
Find Deal
Wed, Nov 19 - Sat, Nov 22
Southwest Logo
3:35 pm - 10:00 pmCVG-STL
7h 25m1 stop
Southwest Logo
12:45 pm - 10:30 pmSTL-CVG
8h 45m2 stops
$242Southwest
Find Deal
Tue, Dec 2 - Wed, Dec 3
Delta Logo
7:10 am - 12:35 pmCVG-STL
6h 25m1 stop
Delta Logo
9:10 am - 3:48 pmSTL-CVG
5h 38m1 stop
$247Delta
Find Deal
Sat, Oct 18 - Tue, Oct 21
Southwest Logo
5:50 am - 1:50 pmCVG-STL
9h 00m2 stops
Southwest Logo
5:45 pm - 12:30 amSTL-CVG
5h 45m1 stop
$252Southwest
Find Deal
Wed, Nov 19 - Sat, Nov 22
Southwest Logo
5:50 am - 1:50 pmCVG-STL
9h 00m2 stops
Southwest Logo
2:30 pm - 12:30 amSTL-CVG
9h 00m2 stops
$257Southwest
Find Deal
Wed, Nov 19 - Sat, Nov 22
American Airlines Logo
5:00 am - 8:27 amCVG-STL
4h 27m1 stop
American Airlines Logo
8:40 am - 2:51 pmSTL-CVG
5h 11m1 stop
$309American Airlines
Find Deal
Fri, Nov 21 - Fri, Nov 28

Delta flights from Cincinnati to St. Louis

Our best Delta deals on Cincinnati to St. Louis flight tickets
Delta
Dec 2
CVG10:01 amCincinnati Cinci./N. Kentucky
7h 06m
1 stop
STL4:07 pmLambert-St Louis
Dec 3
STL7:05 amLambert-St Louis
6h 11m
1 stop
CVG2:16 pmCincinnati Cinci./N. Kentucky
$237
Find similar
Delta
Oct 18
CVG7:10 amCincinnati Cinci./N. Kentucky
6h 25m
1 stop
STL12:35 pmLambert-St Louis
Oct 21
STL9:10 amLambert-St Louis
5h 38m
1 stop
CVG3:48 pmCincinnati Cinci./N. Kentucky
$247
Find similar
Delta
Sep 19
CVG6:45 pmCincinnati Cinci./N. Kentucky
5h 39m
1 stop
STL11:24 pmLambert-St Louis
Sep 20
STL10:40 amLambert-St Louis
5h 43m
1 stop
CVG5:23 pmCincinnati Cinci./N. Kentucky
$607
Find similar

American Airlines flights from Cincinnati to St. Louis

Our best American Airlines deals on Cincinnati to St. Louis flight tickets
American Airlines
Nov 19
CVG7:16 amCincinnati Cinci./N. Kentucky
10h 20m
1 stop
STL4:36 pmLambert-St Louis
Nov 22
STL6:45 pmLambert-St Louis
4h 13m
1 stop
CVG11:58 pmCincinnati Cinci./N. Kentucky
$239
Find similar
American Airlines
Nov 21
CVG5:00 amCincinnati Cinci./N. Kentucky
4h 27m
1 stop
STL8:27 amLambert-St Louis
Nov 28
STL8:40 amLambert-St Louis
5h 11m
1 stop
CVG2:51 pmCincinnati Cinci./N. Kentucky
$309
Find similar
American Airlines
Sep 29
CVG4:12 pmCincinnati Cinci./N. Kentucky
4h 10m
1 stop
STL7:22 pmLambert-St Louis
Oct 2
STL1:53 pmLambert-St Louis
5h 48m
1 stop
CVG8:41 pmCincinnati Cinci./N. Kentucky
$455
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 September 16, 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

Mon 9/29

5:20 am-1:02 pm

1 stop8h 42m

Lambert-St Louis

Thu 10/2

10:49 am-11:59 pm

1 stop12h 10m

$159

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 10/29

6:05 am-9:07 am

1 stop28h 02m

Lambert-St Louis

Wed 11/5

7:45 pm-1:39 am

1 stop28h 54m

$205

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 10/29

9:30 pm-5:27 pm

2 stops20h 57m

Lambert-St Louis

Wed 11/5

7:45 pm-1:39 am

1 stop28h 54m

$226

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 12/2

10:01 am-4:07 pm

1 stop7h 06m

Lambert-St Louis

Wed 12/3

7:05 am-2:16 pm

1 stop6h 11m

$237

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 11/19

7:16 am-4:36 pm

1 stop10h 20m

Lambert-St Louis

Sat 11/22

6:45 pm-11:58 pm

1 stop4h 13m

$239

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 12/2

3:35 pm-10:00 pm

1 stop7h 25m

Lambert-St Louis

Wed 12/3

12:45 pm-10:30 pm

2 stops8h 45m

$242

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 10/18

7:10 am-12:35 pm

1 stop6h 25m

Lambert-St Louis

Tue 10/21

9:10 am-3:48 pm

1 stop5h 38m

$247

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 11/19

5:50 am-1:50 pm

2 stops9h 00m

Lambert-St Louis

Sat 11/22

5:45 pm-12:30 am

1 stop5h 45m

$252

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 11/19

5:50 am-1:50 pm

2 stops9h 00m

Lambert-St Louis

Sat 11/22

2:30 pm-12:30 am

2 stops9h 00m

$257

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 11/21

5:00 am-8:27 am

1 stop4h 27m

Lambert-St Louis

Fri 11/28

8:40 am-2:51 pm

1 stop5h 11m

$309

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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 September 2025, prices for Cincinnati to St. Louis flights are approximately 10% cheaper 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 4h 10m, 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
3,174 reviews
Search Frontier flights
American AirlinesPriceFrom $219Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
7,957 reviews
Search Delta flights
United AirlinesPriceFrom $262Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
SouthwestPriceFrom $297Free CancellationRating
8.0
4,242 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 10/16
Thu 10/23
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States