UA 1012 then DL 2388 at Atlanta
Newark → Atlanta → Milwaukee
Timetable, Atlanta time
08:32UA 1012 from Newark at the gate
21:25DL 2388 to Milwaukee leaves the gate
12 h 53 apart on the timetable
DL 2388 leaves 12 h 53 after UA 1012 arrives on the timetable: more than half a day, so not a connection we count.