$80 Cheap American Airlines flights St. Louis (STL) to Atlanta (ATL)

Apply the "Price (lowest to highest)" filter on Expedia to search for cheap American Airlines round-trip flights from $147 from STL to ATL. Affordable one-way tickets from $80 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Begin your search one to three months ahead of your travel date to score cheap fares on American Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Hartsfield-Jackson Atlanta Intl. Airport (ATL). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

Filter your results by "Morning" and "Early Morning" to see the earliest departures from STL to ATL. Leaving early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.