What are the cheapest airlines flying from Cincinnati to St. Louis round-trip?

Currently priced at $177, Southwest will fly you from Cincinnati to St. Louis and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Frontier - these airlines can fly you to your destination from $214 and $227, respectively. Southwest is priced at 52% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Cincinnati to St. Louis one-way?

The cheapest airlines for a one-way flight from Cincinnati to St. Louis are United Airlines ($84), Frontier ($85), and American Airlines ($89).

What is the cheapest day to fly from Cincinnati to St. Louis?

Travelers seeking maximum savings on their Cincinnati to St. Louis flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the most popular airlines that fly from Cincinnati to St. Louis?

Before booking your flight from Cincinnati to St. Louis check out the most popular airlines for this route: American Airlines, Delta or Frontier.

What is the cheapest day to fly round-trip from Cincinnati to St. Louis?

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 44% on the overall cost on flights from Cincinnati to St. Louis.

What is the cheapest month to fly from Cincinnati to St. Louis?

Flights from Cincinnati to St. Louis lean towards being more expensive in September. Prices are generally better when you fly from Cincinnati to St. Louis in July, with the cheapest ticket starting at $217.

Can I find deals for flights from Cincinnati to St. Louis that include hotel bookings?

Yes. In addition to deals on Cincinnati to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Cincinnati to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cincinnati to St. Louis.

Can I find deals for business class flights from Cincinnati to St. Louis?

Yes. Cheapflights offers flight deals from Cincinnati to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$84+ Flights from Cincinnati to St. Louis

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Cheap flight deals from Cincinnati to St. Louis

Round-trip from	$177 (Southwest)
One-way from	$84 (United Airlines)
Popular in	September
Cheapest in	July
Average price	$286

From Cincinnati Cinci./N. Kentucky to Lambert-St Louis

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One-way flight from Cincinnati Cinci./N. Kentucky to Lambert-St Louis

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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Cincinnati to St. Louis

Cheapest flights from Cincinnati to St. Louis
Explore the most affordable flight options available from Cincinnati to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Thu 9/184:35 pmCVG - STL

1 stop7h 50mSouthwest

Tue 9/237:00 amSTL - CVG

1 stop4h 25mSouthwest

Deal found 7/2

$177

Tue 7/297:00 amCVG - STL

1 stop6h 27mUnited Airlines

Tue 8/55:31 pmSTL - CVG

1 stop5h 15mUnited Airlines

Deal found 7/1

$214

Wed 7/165:40 pmCVG - STL

1 stop20h 54mFrontier

Fri 7/185:40 pmSTL - CVG

1 stop6h 39mFrontier

Deal found 7/2

$227

Thu 8/76:16 amCVG - STL

1 stop6h 55mAmerican Airlines

Sun 8/107:01 amSTL - CVG

1 stop6h 23mAmerican Airlines

Deal found 7/1

$242

Mon 8/256:46 pmCVG - STL

1 stop4h 16mDelta

Wed 8/271:26 pmSTL - CVG

1 stop5h 35mDelta

Deal found 7/2

$252

Thu 7/176:15 amCVG - STL

1 stop11h 16mMultiple Airlines

Mon 7/2110:47 amSTL - CVG

3 stops26h 19mMultiple Airlines

Deal found 7/1

$350

Best flights from Cincinnati to St. Louis
Discover carefully curated flight deals from Cincinnati to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Thu 9/184:35 pmCVG - STL

1 stop7h 50mSouthwest

Tue 9/237:00 amSTL - CVG

1 stop4h 25mSouthwest

Deal found 7/2

$177

Tue 7/297:00 amCVG - STL

1 stop6h 27mUnited Airlines

Tue 8/55:31 pmSTL - CVG

1 stop5h 15mUnited Airlines

Deal found 7/1

$214

Wed 7/165:40 pmCVG - STL

1 stop20h 54mFrontier

Fri 7/185:40 pmSTL - CVG

1 stop6h 39mFrontier

Deal found 7/2

$227

Thu 8/76:16 amCVG - STL

1 stop6h 55mAmerican Airlines

Sun 8/107:01 amSTL - CVG

1 stop6h 23mAmerican Airlines

Deal found 7/1

$242

Mon 8/256:46 pmCVG - STL

1 stop4h 16mDelta

Wed 8/271:26 pmSTL - CVG

1 stop5h 35mDelta

Deal found 7/2

$252

Thu 7/176:15 amCVG - STL

1 stop11h 16mMultiple Airlines

Mon 7/2110:47 amSTL - CVG

3 stops26h 19mMultiple Airlines

Deal found 7/1

$350

Last-minute flights from Cincinnati to St. Louis
Discover last-minute flight deals from Cincinnati to St. Louis. Data last updated July 3, 2025 and is based on user searches.

Wed 7/912:39 pmCVG - STL

1 stop4h 43mAmerican Airlines

Wed 7/95:27 pmSTL - CVG

1 stop6h 05mAmerican Airlines

Deal found 7/2

$501

Thu 7/1011:25 amCVG - STL

2 stops8h 35mUnited Airlines

Sun 7/139:09 amSTL - CVG

1 stop6h 43mUnited Airlines

Deal found 7/2

$848

Sun 7/1310:35 amCVG - STL

1 stop9h 24mFrontier

Fri 7/182:27 pmSTL - CVG

1 stop9h 32mFrontier

Deal found 7/1

$274

Sun 7/1312:00 pmCVG - STL

2 stops10h 15mSouthwest

Fri 7/183:35 pmSTL - CVG

2 stops7h 35mSouthwest

Deal found 7/1

$494

Wed 7/165:40 pmCVG - STL

1 stop20h 54mFrontier

Fri 7/185:40 pmSTL - CVG

1 stop6h 39mFrontier

Deal found 7/2

$227

Thu 7/176:15 amCVG - STL

1 stop11h 16mMultiple Airlines

Mon 7/2110:47 amSTL - CVG

3 stops26h 19mMultiple Airlines

Deal found 7/1

$350

Tue 7/297:00 amCVG - STL

1 stop6h 27mUnited Airlines

Tue 8/55:31 pmSTL - CVG

1 stop5h 15mUnited Airlines

Deal found 7/1

$214

Thu 8/76:16 amCVG - STL

1 stop6h 55mAmerican Airlines

Sun 8/107:01 amSTL - CVG

1 stop6h 23mAmerican Airlines

Deal found 7/1

$242

Fri 8/156:40 amCVG - STL

1 stop3h 00mSouthwest

Mon 8/189:10 amSTL - CVG

1 stop4h 35mSouthwest

Deal found 7/1

$220

Mon 8/256:46 pmCVG - STL

1 stop4h 16mDelta

Wed 8/271:26 pmSTL - CVG

1 stop5h 35mDelta

Deal found 7/2

$252

One-way flights from Cincinnati to St. Louis
Search for one-way flight options from Cincinnati to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Tue 12/99:00 amCVG - STL

1 stop6h 20mUnited Airlines

Deal found 7/1

$84

Sat 7/1210:20 amCVG - STL

1 stop4h 39mFrontier

Deal found 7/1

$85

Tue 8/512:01 pmCVG - STL

1 stop5h 21mAmerican Airlines

Deal found 7/1

$89

Tue 8/51:15 pmCVG - STL

2 stops7h 45mSouthwest

Deal found 7/1

$94

Tue 7/298:11 amCVG - STL

1 stop9h 20mMultiple Airlines

Deal found 6/30

$107

Wed 7/305:40 amCVG - STL

1 stop5h 01mDelta

Deal found 6/30

$126

Cheapflights Fare Finder

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 9/18

4:35 pm-11:25 pm

1 stop7h 50m

Lambert-St Louis

Tue 9/23

7:00 am-12:25 pm

1 stop4h 25m

$177

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 7/29

7:00 am-12:27 pm

1 stop6h 27m

Lambert-St Louis

Tue 8/5

5:31 pm-11:46 pm

1 stop5h 15m

$214

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 7/16

5:40 pm-1:34 pm

1 stop20h 54m

Lambert-St Louis

Fri 7/18

5:40 pm-1:19 am

1 stop6h 39m

$227

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 8/7

6:16 am-12:11 pm

1 stop6h 55m

Lambert-St Louis

Sun 8/10

7:01 am-2:24 pm

1 stop6h 23m

$242

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 8/25

6:46 pm-10:02 pm

1 stop4h 16m

Lambert-St Louis

Wed 8/27

1:26 pm-8:01 pm

1 stop5h 35m

$252

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 7/17

6:15 am-4:31 pm

1 stop11h 16m

Lambert-St Louis

Mon 7/21

10:47 am-2:06 pm

3 stops26h 19m

$350

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 12/9

9:00 am-2:20 pm

1 stop6h 20m

$84

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 7/12

10:20 am-1:59 pm

1 stop4h 39m

$85

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 8/5

12:01 pm-4:22 pm

1 stop5h 21m

$89

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 8/5

1:15 pm-8:00 pm

2 stops7h 45m

$94

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 12 results

Best time to book a flight from Cincinnati to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Cincinnati with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cincinnati to St. Louis

What is the cheapest month to book a flight from Cincinnati to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Cincinnati to St. Louis (average of $311). Flying from Cincinnati to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CVG to STL?

When flying from Cincinnati to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 28% versus a flight in the afternoon.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and United Airlines from Cincinnati to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,266 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,982 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,861 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Frontier

5.9

Fair

3,286 reviews

Southwest

8.0

Very good

4,266 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

What are the cheapest airlines flying from Cincinnati to St. Louis round-trip?
Currently priced at $177, Southwest will fly you from Cincinnati to St. Louis and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Frontier - these airlines can fly you to your destination from $214 and $227, respectively. Southwest is priced at 52% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Cincinnati to St. Louis one-way?
The cheapest airlines for a one-way flight from Cincinnati to St. Louis are United Airlines ($84), Frontier ($85), and American Airlines ($89).
Can I find deals for flights from Cincinnati to St. Louis that include hotel bookings?
Yes. In addition to deals on Cincinnati to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Cincinnati to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cincinnati to St. Louis.
Can I find deals for business class flights from Cincinnati to St. Louis?
Yes. Cheapflights offers flight deals from Cincinnati to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Cincinnati to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Cincinnati to St. Louis (average of $311). Flying from Cincinnati to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

O'Fallon

Maryland Heights

Fairview Heights

Collinsville

Eureka

St. Peters

Glencoe

Alton

Festus

Chesterfield

Farmington

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Top 5 airlines flying from Cincinnati to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$112	Average$214	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$231	Average$472	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$236	Average$335	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$262	Average$346	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$297	Average$336	FlexibilityNo cancel fee	On-time63%

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$84+ Cheap flights from Cincinnati to St. Louis (CVG - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Cincinnati to St. Louis with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Cincinnati to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Cincinnati to St. Louis

Cheapest flights from Cincinnati to St. LouisExplore the most affordable flight options available from Cincinnati to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Cincinnati to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Cincinnati to St. Louis that are best for you.

Best time to book a flight from Cincinnati to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Cincinnati with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Cincinnati to St. Louis

What is the cheapest month to book a flight from Cincinnati to St. Louis?

What is the cheapest time of day to fly from CVG to STL?

Find hourly flight availability from Cincinnati to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and United Airlines from Cincinnati to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Cincinnati to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Cincinnati to St. Louis round-trip?

What are the cheapest airlines to fly from Cincinnati to St. Louis one-way?

Can I find deals for flights from Cincinnati to St. Louis that include hotel bookings?

How can I find direct flights from Cincinnati to St. Louis?

Can I find deals for business class flights from Cincinnati to St. Louis?

What is the cheapest month to book a flight from Cincinnati to St. Louis?

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Alternative routes for Cincinnati to St. Louis

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Top 5 airlines flying from Cincinnati to St. Louis

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Cheapest flights from Cincinnati to St. Louis
Explore the most affordable flight options available from Cincinnati to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.