DL 854 then DL 585 at Atlanta
Springfield → Atlanta → Mexico City
Timetable, Atlanta time
18:50DL 854 from Springfield at the gate
17:49DL 585 to Mexico City leaves the gate
22 h 59 apart on the timetable, overnight
DL 585 leaves 22 h 59 after DL 854 arrives on the timetable: more than half a day, so not a connection we count.