AA 4987 then UA 907 at O'Hare
Flint → Chicago → Frankfurt am Main
Timetable, Chicago time
18:15AA 4987 from Flint at the gate
18:10UA 907 to Frankfurt am Main leaves the gate
23 h 55 apart on the timetable, overnight
UA 907 leaves 23 h 55 after AA 4987 arrives on the timetable: more than half a day, so not a connection we count.