The cheapest times to fly from STL to BTR are

  • January 1st to February 11th
  • April 16th to May 6th
  • July 9th to November 18th (except the weeks of July 23rd, July 30th, October 8th, and October 15th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STL to BTR is early December. Prices can be as high as $615 for Friday flights during early to mid March, or as low as $241 for Tuesday flights around early December.


When to Fly to Baton Rouge

Flying from St. Louis, MO (STL) to Baton Rouge, LA (BTR) will usually cost between $258 to $478 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early December with an average ticket price of $287. Due to high demand the most expensive time to fly is early to mid March, with an average price of $459. Planning your trip to low-cost times can easily save you $173 on economy flights and even more on first-class flights. Generally, any price below $308 can be considered a good price for a round-trip STL to BTR flight.

See below for a graph of average weekly prices for the STL to BTR route. All prices are for round-trip tickets in USD.

STL to BTR Flight Prices

Compared to other flights, the STL to BTR flight is much cheaper than the average and costs much less than the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.34, which is in the normal range for a flight.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to BTR, and Wednesday the cheapest day to fly back into STL. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $106 (28%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $274. Return trip prices are from the BTR to STL flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from STL to BTR can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 2 hour 0 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from STL to BTR while comparing.

Destination alternative #1: Hattiesburg-Laurel Regional Airport (PIB) in Hattiesburg/Laurel, MS

  • 125 miles (201 km) away from BTR
  • Usually 11.04% less expensive than BTR
  • 1-layover flights available

See STL to PIB flights

Destination alternative #2: Jackson Medgar Wiley Evers International Airport (JAN) in Jackson/Vicksburg, MS

  • 138 miles (222 km) away from BTR
  • Usually 10.71% less expensive than BTR
  • 1-layover flights available

See STL to JAN flights

Destination alternative #3: Gulfport-Biloxi International Airport (GPT) in Gulfport/Biloxi, MS

  • 124 miles (200 km) away from BTR
  • Usually 3.57% less expensive than BTR
  • 1-layover flights available

See STL to GPT flights

Destination alternative #4: Lafayette Regional Paul Fournet Field Airport (LFT) in Lafayette, LA

  • 55 miles (89 km) away from BTR
  • Usually 3.25% less expensive than BTR
  • 1-layover flights available

See STL to LFT flights

Destination alternative #5: Alexandria International Airport (AEX) in Alexandria, LA

  • 99 miles (159 km) away from BTR
  • Usually 1.14% less expensive than BTR
  • 1-layover flights available

See STL to AEX flights


Flight Questions Answered

Still have questions about flying from STL to BTR? We’ve got answers.

Which airlines fly this route?

You can find 3 major airlines flying this route most often: American, Delta, United, and potentially more during busy seasons.

How far away is it from Baton Rouge Metropolitan/Ryan Field Airport to St Louis Lambert International Airport?

The distance between the two airports is roughly 569 miles or 916 kilometers.

How long does it take to fly from STL to BTR?

The real-world flight time for a nonstop STL to BTR flight is about 2 hour 0 minutes.

How many flights go between St. Louis, MO and Baton Rouge, LA?

It depends on the day of the week and the date, but a typical day might have around 62 available flights from STL to BTR.


Airport Location Info


Departing Airport

Origination codeSTL
Origination airport nameSt Louis Lambert International Airport
CitySt. Louis, MO
Countrythe United States

Return Airport

Destination codeBTR
Destination airport nameBaton Rouge Metropolitan/Ryan Field Airport
CityBaton Rouge, LA
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.