$100 Cheap Flights from Dayton (DAY) to St. Louis (STL)

View $100 flight on Thu, Nov 27, 2025Opens in a new window

Popular airlines from Dayton Intl. Airport (DAY) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Dayton to St. Louis (DAY-STL)

Prices were available within the past 7 days and start at $100 for one-way flights and $214 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Oct 31 - Sat, Nov 1
DAY
Dayton
STL
St. Louis
$214 Roundtrip, found 2 days ago
$214
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Oct 31 from Dayton to St. Louis, returning Sat, Nov 1, priced at $214 found 2 days ago
Delta
Thu, Oct 23 - Tue, Oct 28
DAY
Dayton
STL
St. Louis
$229 Roundtrip, found 1 hour ago
$229
Roundtrip
found 1 hour ago
Select Delta flight, departing Thu, Oct 23 from Dayton to St. Louis, returning Tue, Oct 28, priced at $229 found 1 hour ago
United
Fri, Oct 10 - Sun, Oct 12
DAY
Dayton
STL
St. Louis
$229 Roundtrip, found 1 day ago
$229
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 10 from Dayton to St. Louis, returning Sun, Oct 12, priced at $229 found 1 day ago
Delta
Sat, Oct 4 - Tue, Oct 21
DAY
Dayton
STL
St. Louis
$234 Roundtrip, found 5 hours ago
$234
Roundtrip
found 5 hours ago
Select Delta flight, departing Sat, Oct 4 from Dayton to St. Louis, returning Tue, Oct 21, priced at $234 found 5 hours ago
Delta
Sat, Oct 4 - Tue, Oct 7
DAY
Dayton
STL
St. Louis
$239 Roundtrip, found 5 hours ago
$239
Roundtrip
found 5 hours ago
Select Delta flight, departing Sat, Oct 4 from Dayton to St. Louis, returning Tue, Oct 7, priced at $239 found 5 hours ago
United
Fri, Oct 10 - Sun, Oct 12
DAY
Dayton
STL
St. Louis
$241 Roundtrip, found 1 day ago
$241
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 10 from Dayton to St. Louis, returning Sun, Oct 12, priced at $241 found 1 day ago
Delta
Sat, Oct 11 - Mon, Oct 20
DAY
Dayton
STL
St. Louis
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Oct 11 from Dayton to St. Louis, returning Mon, Oct 20, priced at $249 found 1 day ago
United
Sat, Oct 4 - Wed, Oct 8
DAY
Dayton
STL
St. Louis
$252 Roundtrip, found 20 hours ago
$252
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct 4 from Dayton to St. Louis, returning Wed, Oct 8, priced at $252 found 20 hours ago
Delta
Sat, Oct 4 - Mon, Oct 20
DAY
Dayton
STL
St. Louis
$254 Roundtrip, found 5 hours ago
$254
Roundtrip
found 5 hours ago
Select Delta flight, departing Sat, Oct 4 from Dayton to St. Louis, returning Mon, Oct 20, priced at $254 found 5 hours ago
American Airlines
Thu, Jan 1 - Sat, Jan 17
DAY
Dayton
STL
St. Louis
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Jan 1 from Dayton to St. Louis, returning Sat, Jan 17, priced at $259 found 1 day ago

Find the cheapest month to fly from Dayton (DAY) to St. Louis (STL)

February is typically the cheapest month to fly

From $213 - $462 per traveler.

Frequently asked questions

How much does a flight from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $100 or cheap return flight from $214 from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL)?
October is the least expensive month to fly from DAY to STL. Traveling during an off-peak travel window is often the key to finding better deals on flights.
What is the cheapest airline that flies from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from DAY to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DAY to STL?
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 peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**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 James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from DAY to STL are usually more expensive. To secure the best prices, start searching for flights well in advance. That being said, if you're flexible with your travel plans, you may find a cheap ticket right before you leave.
Is it cheaper to book a DAY to STL flight and hotel package?
You'll typically save money by booking a DAY to STL 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 it all in one place. Once you've selected your preferred accommodations and flights, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from James M. Cox Dayton Intl. Airport (DAY) to Lambert-St. Louis Intl. Airport (STL)?
It's usually possible to reschedule or cancel your DAY to STL flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
James M. Cox Dayton Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$213
Distance
337 mi

Book with confidence

Book with confidence

Dayton to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Dayton 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 Dayton 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 Dayton to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $100 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 Dayton 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 Dayton 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.

 

Dayton to St. Louis Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.