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

View $78 flight on Mon, Sep 29, 2025Opens in a new window

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

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

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 30 - Sun, Nov 2
CVG
Cincinnati
STL
St. Louis
$156 Roundtrip, found 6 hours ago
$156
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Cincinnati to St. Louis, returning Sun, Nov 2, priced at $156 found 6 hours ago
Southwest Airlines
Tue, Oct 7 - Sat, Oct 11
CVG
Cincinnati
STL
St. Louis
$164 Roundtrip, found 4 days ago
$164
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Oct 7 from Cincinnati to St. Louis, returning Sat, Oct 11, priced at $164 found 4 days ago
Frontier Airlines
Thu, Oct 30 - Sat, Nov 1
CVG
Cincinnati
STL
St. Louis
$169 Roundtrip, found 10 hours ago
$169
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Cincinnati to St. Louis, returning Sat, Nov 1, priced at $169 found 10 hours ago
Southwest Airlines
Tue, Oct 7 - Sat, Oct 11
CVG
Cincinnati
STL
St. Louis
$173 Roundtrip, found 4 days ago
$173
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Oct 7 from Cincinnati to St. Louis, returning Sat, Oct 11, priced at $173 found 4 days ago
Southwest Airlines
Sat, Oct 25 - Mon, Oct 27
CVG
Cincinnati
STL
St. Louis
$176 Roundtrip, found 4 days ago
$176
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Sat, Oct 25 from Cincinnati to St. Louis, returning Mon, Oct 27, priced at $176 found 4 days ago
American Airlines
Sat, Oct 25 - Mon, Oct 27
CVG
Cincinnati
STL
St. Louis
$179 Roundtrip, found 4 days ago
$179
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Oct 25 from Cincinnati to St. Louis, returning Mon, Oct 27, priced at $179 found 4 days ago
Frontier Airlines
Sat, Oct 25 - Mon, Oct 27
CVG
Cincinnati
STL
St. Louis
$179 Roundtrip, found 4 days ago
$179
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Oct 25 from Cincinnati to St. Louis, returning Mon, Oct 27, priced at $179 found 4 days ago
Southwest Airlines
Tue, Oct 7 - Fri, Oct 10
CVG
Cincinnati
STL
St. Louis
$181 Roundtrip, found 5 days ago
$181
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Oct 7 from Cincinnati to St. Louis, returning Fri, Oct 10, priced at $181 found 5 days ago
Delta
Tue, Oct 7 - Fri, Oct 10
CVG
Cincinnati
STL
St. Louis
$184 Roundtrip, found 5 days ago
$184
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Oct 7 from Cincinnati to St. Louis, returning Fri, Oct 10, priced at $184 found 5 days ago
United
Tue, Oct 7 - Sat, Oct 11
CVG
Cincinnati
STL
St. Louis
$189 Roundtrip, found 4 days ago
$189
Roundtrip
found 4 days ago
Select United flight, departing Tue, Oct 7 from Cincinnati to St. Louis, returning Sat, Oct 11, priced at $189 found 4 days ago

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

February is typically the cheapest month to fly

From $120 - $506 per traveler.

Frequently asked questions

How much does a flight from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $78 or cheap return flight from $156 from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from CVG to STL is October, when there's less demand. Off-peak season is often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from CVG to STL. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL)?
You'll need to take a flight with a layover if you're traveling from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from CVG to STL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change based on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL)?
To land at Lambert-St. Louis Intl. Airport (STL) on time, opt for a flight that leaves from Cincinnati - Northern Kentucky Intl. Airport (CVG) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from CVG to STL are generally more expensive. For the cheapest rates, start looking for flights early. That being said, if you can play around with your travel dates, you may land a cheap ticket right before your journey.
Is it cheaper to book a CVG to STL flight and hotel package?
Securing a CVG to STL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can modify or cancel your CVG to STL flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you need further information, go to our Customer Service portal.

Travel information

Travel information

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

Book with confidence

Book with confidence

Cincinnati to St. Louis Flights

The cheapest times to fly from Cincinnati to St. Louis

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 Cincinnati to St. Louis are during the month of October. You can find some of the cheapest flights from Cincinnati to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Cincinnati to St. Louis: 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 Cincinnati to St. Louis

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 Cincinnati to St. Louis 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 Cincinnati to St. Louis 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 Cincinnati to St. Louis 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.

 

Cincinnati to St. Louis Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.