Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Cincinnati to St. Louis from $64

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 2/6. 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
5:39 pm - 10:23 am
CVG
-
STL
17h 44m1 stop
Frontier Logo
5:42 pm - 3:03 pm
STL
-
CVG
20h 21m1 stop
$137Frontier
Thu, Jan 22 - Fri, Jan 23
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
$181Frontier
Sat, Jan 17 - Sat, Jan 24
Frontier Logo
6:10 am - 10:02 am
CVG
-
STL
28h 52m1 stop
Frontier Logo
5:11 pm - 3:03 pm
STL
-
CVG
20h 52m1 stop
$201Frontier
Fri, Jan 9 - Fri, Jan 16
Multiple Airlines Logo
6:10 am - 10:02 am
CVG
-
STL
28h 52m1 stop
Multiple Airlines Logo
8:32 pm - 2:38 pm
STL
-
CVG
17h 06m2 stops
$207Multiple Airlines
Fri, Jan 9 - Fri, Jan 16
Frontier Logo
5:39 pm - 11:33 pm
CVG
-
STL
6h 54m1 stop
Frontier Logo
10:01 pm - 8:53 pm
STL
-
CVG
21h 52m2 stops
$223Frontier
Mon, Feb 2 - Thu, Feb 5
Frontier Logo
10:30 am - 11:33 pm
CVG
-
STL
14h 03m1 stop
Frontier Logo
7:39 pm - 3:57 pm
STL
-
CVG
19h 18m2 stops
$225Frontier
Thu, Jan 22 - Fri, Jan 23
Frontier Logo
6:10 am - 10:02 am
CVG
-
STL
28h 52m1 stop
Frontier Logo
4:27 pm - 1:06 am
STL
-
CVG
7h 39m1 stop
$232Frontier
Sun, Dec 21 - Wed, Dec 31
American Airlines Logo
1:09 pm - 6:34 pm
CVG
-
STL
6h 25m1 stop
American Airlines Logo
6:00 am - 12:37 pm
STL
-
CVG
5h 37m1 stop
$243American Airlines
Sat, Jan 17 - Sat, Jan 24
Frontier Logo
11:58 am - 9:49 am
CVG
-
STL
22h 51m1 stop
Frontier Logo
7:42 am - 4:00 pm
STL
-
CVG
7h 18m1 stop
$252Frontier
Fri, Mar 6 - Sun, Mar 8
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
$263Frontier
Mon, Jan 12 - Thu, Jan 15

Frontier flights from Cincinnati to St. Louis

Our best Frontier deals on Cincinnati to St. Louis flight tickets
Frontier
Jan 22
CVG5:39 pmCincinnati Cinci./N. Kentucky
17h 44m
1 stop
STL10:23 amLambert-St Louis
Jan 23
STL5:42 pmLambert-St Louis
20h 21m
1 stop
CVG3:03 pmCincinnati Cinci./N. Kentucky
$137
Find similar
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
$181
Find similar
Frontier
Jan 9
CVG6:10 amCincinnati Cinci./N. Kentucky
28h 52m
1 stop
STL10:02 amLambert-St Louis
Jan 16
STL5:11 pmLambert-St Louis
20h 52m
1 stop
CVG3:03 pmCincinnati Cinci./N. Kentucky
$201
Find similar

Southwest flights from Cincinnati to St. Louis

Our best Southwest deals on Cincinnati to St. Louis flight tickets
Southwest
Feb 18
CVG1:35 pmCincinnati Cinci./N. Kentucky
8h 25m
2 stops
STL9:00 pmLambert-St Louis
Feb 20
STL5:55 amLambert-St Louis
5h 45m
1 stop
CVG12:40 pmCincinnati Cinci./N. Kentucky
$283
Find similar
Southwest
Feb 18
CVG5:55 amCincinnati Cinci./N. Kentucky
7h 50m
2 stops
STL12:45 pmLambert-St Louis
Feb 20
STL8:30 amLambert-St Louis
8h 25m
2 stops
CVG5:55 pmCincinnati Cinci./N. Kentucky
$288
Find similar
Southwest
Feb 22
CVG6:25 amCincinnati Cinci./N. Kentucky
3h 50m
1 stop
STL9:15 amLambert-St Louis
Feb 24
STL8:15 amLambert-St Louis
8h 20m
2 stops
CVG5:35 pmCincinnati Cinci./N. Kentucky
$297
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 11, 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

Thu 1/22

5:39 pm-10:23 am

1 stop17h 44m

Lambert-St Louis

Fri 1/23

5:42 pm-3:03 pm

1 stop20h 21m

$137

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

$181

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 1/9

6:10 am-10:02 am

1 stop28h 52m

Lambert-St Louis

Fri 1/16

5:11 pm-3:03 pm

1 stop20h 52m

$201

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 1/9

6:10 am-10:02 am

1 stop28h 52m

Lambert-St Louis

Fri 1/16

8:32 pm-2:38 pm

2 stops17h 06m

$207

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 2/2

5:39 pm-11:33 pm

1 stop6h 54m

Lambert-St Louis

Thu 2/5

10:01 pm-8:53 pm

2 stops21h 52m

$223

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 1/22

10:30 am-11:33 pm

1 stop14h 03m

Lambert-St Louis

Fri 1/23

7:39 pm-3:57 pm

2 stops19h 18m

$225

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sun 12/21

6:10 am-10:02 am

1 stop28h 52m

Lambert-St Louis

Wed 12/31

4:27 pm-1:06 am

1 stop7h 39m

$232

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 1/17

1:09 pm-6:34 pm

1 stop6h 25m

Lambert-St Louis

Sat 1/24

6:00 am-12:37 pm

1 stop5h 37m

$243

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 3/6

11:58 am-9:49 am

1 stop22h 51m

Lambert-St Louis

Sun 3/8

7:42 am-4:00 pm

1 stop7h 18m

$252

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

$263

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 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 03m

Direct flights

None
The fastest flight from Cincinnati to St. Louis takes 4h 03m
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 03m, 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
3,084 reviews
Search Frontier flights
American AirlinesPriceFrom $218Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SouthwestPriceFrom $254Free CancellationRating
7.9
4,253 reviews
Search Southwest flights
United AirlinesPriceFrom $262Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights

  • United Airlines Flights From Cincinnati to St. Louis

    United Airlines flies from Cincinnati to St. Louis around 2 times per week, with 9,095 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Cincinnati to St. Louis in the last 72 hours was $262 (round-trip), much lower than the average airfare cost of $367 for United Airlines flights on this route.

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
Wentzville
St. Peters
Collinsville
Alton
Farmington
Festus
Clayton
Glencoe
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
Sat 1/10
Sat 1/17
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States