$78 Cheap Flights from St. Louis (STL) to Cincinnati (CVG)

View $78 flight on Fri, Oct 17, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Cincinnati-Northern Kentucky Int'l Airport (CVG)

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Cheap Flights from St. Louis to Cincinnati (STL-CVG)

Prices were available within the past 7 days and start at $78 for one-way flights and $156 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Oct 2 - Sun, Oct 12
STL
St. Louis
CVG
Cincinnati
$156 Roundtrip, found 5 hours ago
$156
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Thu, Oct 2 from St. Louis to Cincinnati, returning Sun, Oct 12, priced at $156 found 5 hours ago
Frontier Airlines
Thu, Oct 2 - Thu, Oct 9
STL
St. Louis
CVG
Cincinnati
$169 Roundtrip, found 5 hours ago
$169
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Thu, Oct 2 from St. Louis to Cincinnati, returning Thu, Oct 9, priced at $169 found 5 hours ago
Frontier Airlines
Sun, Oct 5 - Sat, Oct 18
STL
St. Louis
CVG
Cincinnati
$179 Roundtrip, found 5 days ago
$179
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Oct 5 from St. Louis to Cincinnati, returning Sat, Oct 18, priced at $179 found 5 days ago
Frontier Airlines
Sun, Oct 5 - Sun, Oct 12
STL
St. Louis
CVG
Cincinnati
$189 Roundtrip, found 5 hours ago
$189
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sun, Oct 5 from St. Louis to Cincinnati, returning Sun, Oct 12, priced at $189 found 5 hours ago
Frontier Airlines
Fri, Sep 26 - Mon, Oct 6
STL
St. Louis
CVG
Cincinnati
$192 Roundtrip, found 5 days ago
$192
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Sep 26 from St. Louis to Cincinnati, returning Mon, Oct 6, priced at $192 found 5 days ago
United
Thu, Oct 23 - Thu, Oct 30
STL
St. Louis
CVG
Cincinnati
$195 Roundtrip, found 6 days ago
$195
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 23 from St. Louis to Cincinnati, returning Thu, Oct 30, priced at $195 found 6 days ago
Frontier Airlines
Thu, Sep 25 - Thu, Oct 2
STL
St. Louis
CVG
Cincinnati
$198 Roundtrip, found 6 days ago
$198
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Thu, Sep 25 from St. Louis to Cincinnati, returning Thu, Oct 2, priced at $198 found 6 days ago
Frontier Airlines
Sun, Oct 5 - Thu, Oct 9
STL
St. Louis
CVG
Cincinnati
$202 Roundtrip, found 5 hours ago
$202
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sun, Oct 5 from St. Louis to Cincinnati, returning Thu, Oct 9, priced at $202 found 5 hours ago
American Airlines
Thu, Oct 23 - Sun, Oct 26
STL
St. Louis
CVG
Cincinnati
$212 Roundtrip, found 7 hours ago
$212
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Thu, Oct 23 from St. Louis to Cincinnati, returning Sun, Oct 26, priced at $212 found 7 hours ago
Southwest Airlines
Wed, Dec 3 - Sat, Dec 6
STL
St. Louis
CVG
Cincinnati
$247 Roundtrip, found 12 hours ago
$247
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Wed, Dec 3 from St. Louis to Cincinnati, returning Sat, Dec 6, priced at $247 found 12 hours ago

Find the cheapest month to fly from St. Louis (STL) to Cincinnati (CVG)

February is typically the cheapest month to fly

From $120 - $499 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG) cost?
Secure a cheap one-way flight from $78 or cheap return flight from $156 from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG)?
Planning your trip for October can help you save, as it's the cheapest month for flights between STL and CVG. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG)?
To find the cheapest airline flying from STL to CVG, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG)?
You'll have to hop on a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from STL to CVG?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG) last-minute?
Waiting until just before your departure to book your flight from STL to CVG often results in higher prices. Although you may find some last-minute offers, they aren't always guaranteed. Allow some flexibility in your schedule for a better chance of landing a bargain.
Is it cheaper to book a STL to CVG flight and hotel package?
You can save money by booking a STL to CVG flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After selecting your ideal flights and accommodations, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Cincinnati - Northern Kentucky Intl. Airport (CVG)?
If you reserved your STL to CVG flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cincinnati - Northern Kentucky Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$156
Distance
307 mi

Book with confidence

Book with confidence

St. Louis to Cincinnati Flights

The cheapest times to fly from St. Louis to Cincinnati

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Cincinnati are during the month of October. You can find some of the cheapest flights from St. Louis to Cincinnati with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Cincinnati

Sunday is one of the best days to book for cheap flights from St. Louis to Cincinnati: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Cincinnati

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Cincinnati in 2025. You can also book with separate airlines for your outbound and return journeys, from $78 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Cincinnati flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Cincinnati airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Cincinnati Flights

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*Available to One Key members.