DL 590 then DL 2020 at Atlanta
Mexico City → Atlanta → Oklahoma City
Timetable, Atlanta time
11:23DL 590 from Mexico City at the gate
11:20DL 2020 to Oklahoma City leaves the gate
23 h 57 apart on the timetable, overnight
DL 2020 leaves 23 h 57 after DL 590 arrives on the timetable: more than half a day, so not a connection we count.