Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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 1/12. 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

Enter your travel dates to find the best prices.
Frontier Logo
11:57 am - 10:33 pmCVG-STL
11h 36m1 stop
Frontier Logo
9:54 am - 7:45 pmSTL-CVG
8h 51m1 stop
$130Frontier
Find Deal
Mon, Dec 8 - Mon, Dec 15
Frontier Logo
5:15 am - 11:57 pmCVG-STL
19h 42m1 stop
Frontier Logo
3:30 pm - 10:52 amSTL-CVG
18h 22m1 stop
$190Frontier
Find Deal
Mon, Dec 1 - Thu, Dec 4
Frontier Logo
6:15 am - 10:02 amCVG-STL
28h 47m1 stop
Frontier Logo
10:42 am - 5:54 pmSTL-CVG
6h 12m1 stop
$198Frontier
Find Deal
Thu, Feb 19 - Sun, Feb 22
Multiple Airlines Logo
5:05 am - 10:33 pmCVG-STL
18h 28m1 stop
Multiple Airlines Logo
10:47 am - 10:39 amSTL-CVG
22h 52m2 stops
$220Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Frontier Logo
6:00 am - 7:11 pmCVG-STL
14h 11m1 stop
Frontier Logo
5:11 pm - 12:42 amSTL-CVG
6h 31m1 stop
$230Frontier
Find Deal
Sun, Feb 22 - Mon, Feb 23
Frontier Logo
1:36 pm - 10:02 amCVG-STL
21h 26m2 stops
Frontier Logo
10:42 am - 5:54 pmSTL-CVG
6h 12m1 stop
$239Frontier
Find Deal
Thu, Feb 19 - Sun, Feb 22
Delta Logo
9:45 am - 2:49 pmCVG-STL
6h 04m1 stop
Delta Logo
6:00 am - 11:17 amSTL-CVG
4h 17m1 stop
$257Delta
Find Deal
Sat, Jan 17 - Sat, Jan 24
Multiple Airlines Logo
11:29 am - 10:33 pmCVG-STL
12h 04m1 stop
Multiple Airlines Logo
3:30 pm - 1:36 pmSTL-CVG
21h 06m2 stops
$261Multiple Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
American Airlines Logo
6:00 am - 11:03 amCVG-STL
6h 03m1 stop
American Airlines Logo
1:40 pm - 11:45 pmSTL-CVG
9h 05m2 stops
$262American Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 24
Delta Logo
12:13 pm - 4:06 pmCVG-STL
4h 53m1 stop
Delta Logo
9:30 am - 2:15 pmSTL-CVG
3h 45m1 stop
$269Delta
Find Deal
Tue, Dec 2 - Thu, Dec 4

Southwest flights from Cincinnati to St. Louis

Our best Southwest deals on Cincinnati to St. Louis flight tickets
Southwest
Feb 19
CVG1:20 pmCincinnati Cinci./N. Kentucky
7h 40m
2 stops
STL8:00 pmLambert-St Louis
Feb 22
STL3:10 pmLambert-St Louis
7h 35m
2 stops
CVG11:45 pmCincinnati Cinci./N. Kentucky
$302
Find similar
Southwest
Feb 22
CVG5:20 pmCincinnati Cinci./N. Kentucky
7h 05m
1 stop
STL11:25 pmLambert-St Louis
Feb 23
STL2:20 pmLambert-St Louis
7h 45m
2 stops
CVG11:05 pmCincinnati Cinci./N. Kentucky
$309
Find similar
Southwest
Feb 22
CVG2:45 pmCincinnati Cinci./N. Kentucky
7h 00m
2 stops
STL8:45 pmLambert-St Louis
Feb 23
STL9:40 amLambert-St Louis
7h 30m
2 stops
CVG6:10 pmCincinnati Cinci./N. Kentucky
$314
Find similar

United Airlines flights from Cincinnati to St. Louis

Our best United Airlines deals on Cincinnati to St. Louis flight tickets
United Airlines
Dec 9
CVG9:00 amCincinnati Cinci./N. Kentucky
6h 25m
1 stop
STL2:25 pmLambert-St Louis
Dec 16
STL7:00 amLambert-St Louis
12h 45m
2 stops
CVG8:45 pmCincinnati Cinci./N. Kentucky
$318
Find similar
United Airlines
Dec 4
CVG6:00 amCincinnati Cinci./N. Kentucky
10h 40m
2 stops
STL3:40 pmLambert-St Louis
Dec 7
STL3:13 pmLambert-St Louis
4h 32m
1 stop
CVG8:45 pmCincinnati Cinci./N. Kentucky
$555
Find similar
United Airlines
Feb 14
CVG8:35 amCincinnati Cinci./N. Kentucky
4h 50m
1 stop
STL12:25 pmLambert-St Louis
Feb 20
STL6:30 amLambert-St Louis
6h 50m
2 stops
CVG2:20 pmCincinnati Cinci./N. Kentucky
$605
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 12, 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 12/8

11:57 am-10:33 pm

1 stop11h 36m

Lambert-St Louis

Mon 12/15

9:54 am-7:45 pm

1 stop8h 51m

$130

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 12/1

5:15 am-11:57 pm

1 stop19h 42m

Lambert-St Louis

Thu 12/4

3:30 pm-10:52 am

1 stop18h 22m

$190

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 2/19

6:15 am-10:02 am

1 stop28h 47m

Lambert-St Louis

Sun 2/22

10:42 am-5:54 pm

1 stop6h 12m

$198

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 12/8

5:05 am-10:33 pm

1 stop18h 28m

Lambert-St Louis

Mon 12/15

10:47 am-10:39 am

2 stops22h 52m

$220

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sun 2/22

6:00 am-7:11 pm

1 stop14h 11m

Lambert-St Louis

Mon 2/23

5:11 pm-12:42 am

1 stop6h 31m

$230

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 2/19

1:36 pm-10:02 am

2 stops21h 26m

Lambert-St Louis

Sun 2/22

10:42 am-5:54 pm

1 stop6h 12m

$239

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/17

9:45 am-2:49 pm

1 stop6h 04m

Lambert-St Louis

Sat 1/24

6:00 am-11:17 am

1 stop4h 17m

$257

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 12/9

11:29 am-10:33 pm

1 stop12h 04m

Lambert-St Louis

Tue 12/16

3:30 pm-1:36 pm

2 stops21h 06m

$261

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/17

6:00 am-11:03 am

1 stop6h 03m

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 12/2

12:13 pm-4:06 pm

1 stop4h 53m

Lambert-St Louis

Thu 12/4

9:30 am-2:15 pm

1 stop3h 45m

$269

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 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 4h 00m, 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
3,114 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,009 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,235 reviews
Search Southwest flights
United AirlinesPriceFrom $262Free CancellationRating
7.4
9,015 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.

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
Fri 12/12
Fri 12/19
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States