UA 2430 then DL 1692 at Philadelphia
Chicago O'Hare → Philadelphia → Atlanta
Timetable, Philadelphia time
17:47UA 2430 from Chicago O'Hare at the gate
17:17DL 1692 to Atlanta leaves the gate
23 h 30 apart on the timetable, overnight
DL 1692 leaves 23 h 30 after UA 2430 arrives on the timetable: more than half a day, so not a connection we count.