The Flint River rises in west central Georgia in the city of East Point in southern Fulton County on the southern outskirts of the Atlanta metropolitan area as ground seepage.
The exact start can be traced to the field located between Plant Street, Willingham Drive, Elm Street, and Vesta Avenue. It travels under the runways of the Hartsfield-Jackson Atlanta International Airport.
Flowing generally south through rural western Georgia, the river passes through Sprewell Bluff State Park, approximately 10 miles (16 km) west of Thomaston.
Farther south, it comes within 5 miles (8 km) of Andersonville, the site of the Andersonville prison during the Civil War.