DL 503 then DL 2020 at Atlanta
Detroit → Atlanta → Oklahoma City
Timetable, Atlanta time
11:27DL 503 from Detroit at the gate
11:15DL 2020 to Oklahoma City leaves the gate
23 h 48 apart on the timetable, overnight
DL 2020 leaves 23 h 48 after DL 503 arrives on the timetable: more than half a day, so not a connection we count.