AA 865 then UA 3910 at O'Hare
Philadelphia → Chicago → Newark
Timetable, Chicago time
12:18AA 865 from Philadelphia at the gate
07:30UA 3910 to Newark leaves the gate
19 h 12 apart on the timetable, overnight
UA 3910 leaves 19 h 12 after AA 865 arrives on the timetable: more than half a day, so not a connection we count.