$125 Cheap Flights from St. Louis (STL) to Baton Rouge (BTR)

View $125 flight on Wed, Dec 31, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR)

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Cheap Flights from St. Louis to Baton Rouge (STL-BTR)

Prices were available within the past 7 days and start at $125 for one-way flights and $249 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 24 - Tue, Jan 20
STL
St. Louis
BTR
Baton Rouge
$249 Roundtrip, found 2 days ago
$249
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 24 from St. Louis to Baton Rouge, returning Tue, Jan 20, priced at $249 found 2 days ago
American Airlines
Wed, Oct 22 - Tue, Oct 28
STL
St. Louis
BTR
Baton Rouge
$249 Roundtrip, found 1 hour ago
$249
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Oct 22 from St. Louis to Baton Rouge, returning Tue, Oct 28, priced at $249 found 1 hour ago
Delta
Mon, Nov 10 - Tue, Nov 18
STL
St. Louis
BTR
Baton Rouge
$249 Roundtrip, just found
$249
Roundtrip
just found
Select Delta flight, departing Mon, Nov 10 from St. Louis to Baton Rouge, returning Tue, Nov 18, priced at $249 just found
United
Wed, Dec 24 - Tue, Jan 20
STL
St. Louis
BTR
Baton Rouge
$251 Roundtrip, found 2 days ago
$251
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 24 from St. Louis to Baton Rouge, returning Tue, Jan 20, priced at $251 found 2 days ago
American Airlines
Tue, Oct 21 - Wed, Oct 29
STL
St. Louis
BTR
Baton Rouge
$254 Roundtrip, found 3 hours ago
$254
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Oct 21 from St. Louis to Baton Rouge, returning Wed, Oct 29, priced at $254 found 3 hours ago
American Airlines
Wed, Dec 24 - Tue, Jan 20
STL
St. Louis
BTR
Baton Rouge
$254 Roundtrip, found 2 days ago
$254
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Dec 24 from St. Louis to Baton Rouge, returning Tue, Jan 20, priced at $254 found 2 days ago
American Airlines
Wed, Dec 24 - Tue, Jan 20
STL
St. Louis
BTR
Baton Rouge
$256 Roundtrip, found 2 days ago
$256
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Dec 24 from St. Louis to Baton Rouge, returning Tue, Jan 20, priced at $256 found 2 days ago
United
Wed, Nov 26 - Tue, Dec 2
STL
St. Louis
BTR
Baton Rouge
$259 Roundtrip, found 5 days ago
$259
Roundtrip
found 5 days ago
Select United flight, departing Wed, Nov 26 from St. Louis to Baton Rouge, returning Tue, Dec 2, priced at $259 found 5 days ago
United
Tue, Oct 21 - Wed, Oct 29
STL
St. Louis
BTR
Baton Rouge
$259 Roundtrip, found 3 hours ago
$259
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Oct 21 from St. Louis to Baton Rouge, returning Wed, Oct 29, priced at $259 found 3 hours ago
United
Mon, Nov 24 - Tue, Dec 2
STL
St. Louis
BTR
Baton Rouge
$264 Roundtrip, found 4 days ago
$264
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 24 from St. Louis to Baton Rouge, returning Tue, Dec 2, priced at $264 found 4 days ago

Find the cheapest month to fly from St. Louis (STL) to Baton Rouge (BTR)

May is typically the cheapest month to fly

From $223 - $449 per traveler.

Alternative airports near Baton Rouge

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baton Rouge Metropolitan BTR. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $324
BTR
Baton Rouge Metropolitan
CheapestClosest
Average driving time to city center10 min
Flights from $324

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR) cost?
Snag a cheap one-way flight from $125 or cheap return flight from $249 from Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR) 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 Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR)?
December is the most affordable month to fly from STL to BTR. Timing your trip outside of the busy season is often the key to finding better fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from STL to BTR. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR)?
You'll need to take a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from STL to BTR?
Usually you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, carrier and other factors.*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 Baton Rouge Metropolitan Airport (BTR)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR) route, aim to fly before 3 PM. Departures after this hour are 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 Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR) last-minute?
Waiting until just before your trip to book a ticket from STL to BTR generally means paying more. Although you may find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary for the best chance of getting a bargain.
Is it cheaper to book a STL to BTR flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to BTR flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place takes the hassle out of travel planning. Just pick your flights and choose from our extensive range of stays, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Baton Rouge Metropolitan Airport (BTR)?
Usually, it's possible to cancel or reschedule your STL to BTR 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 allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Baton Rouge Metropolitan
Airlines serving
American Airlines, Delta, United
Roundtrip price
$248
Distance
568 mi

Book with confidence

Book with confidence

St. Louis to Baton Rouge Flights

The cheapest times to fly from St. Louis to Baton Rouge

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

 

The best time to book a flight from St. Louis to Baton Rouge

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

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 Baton Rouge in 2025. You can also book with separate airlines for your outbound and return journeys, from $125 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 Baton Rouge 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 Baton Rouge 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 Baton Rouge Flights

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Explore a world of travel with Expedia

*Available to One Key members.