F9 1263 then DL 1621 at Atlanta
Detroit → Atlanta → Baton Rouge
Timetable, Atlanta time
09:04F9 1263 from Detroit at the gate
09:00DL 1621 to Baton Rouge leaves the gate
23 h 56 apart on the timetable, overnight
DL 1621 leaves 23 h 56 after F9 1263 arrives on the timetable: more than half a day, so not a connection we count.