F9 1407 then DL 1892 at Atlanta
Buffalo → Atlanta → Chattanooga
Timetable, Atlanta time
16:18F9 1407 from Buffalo at the gate
14:30DL 1892 to Chattanooga leaves the gate
22 h 12 apart on the timetable, overnight
DL 1892 leaves 22 h 12 after F9 1407 arrives on the timetable: more than half a day, so not a connection we count.