AA 4346 then DL 1892 at Atlanta
New York LaGuardia → Atlanta → Chattanooga
Timetable, Atlanta time
18:07AA 4346 from New York LaGuardia at the gate
14:30DL 1892 to Chattanooga leaves the gate
20 h 23 apart on the timetable, overnight
DL 1892 leaves 20 h 23 after AA 4346 arrives on the timetable: more than half a day, so not a connection we count.