AA 4987 then UA 3910 at O'Hare
Flint → Chicago → Newark
Timetable, Chicago time
18:30AA 4987 from Flint at the gate
07:30UA 3910 to Newark leaves the gate
13 h apart on the timetable, overnight
UA 3910 leaves 13 h after AA 4987 arrives on the timetable: more than half a day, so not a connection we count.