DL 9936 then DL 2862 at Atlanta
ILN → Atlanta → Oklahoma City
Timetable, Atlanta time
15:29DL 9936 from ILN at the gate
15:20DL 2862 to Oklahoma City leaves the gate
23 h 51 apart on the timetable, overnight
DL 2862 leaves 23 h 51 after DL 9936 arrives on the timetable: more than half a day, so not a connection we count.