DL 1716 then AA 4478 at O'Hare
Detroit → Chicago → Portland (Maine)
Timetable, Chicago time
13:59DL 1716 from Detroit at the gate
13:44AA 4478 to Portland (Maine) leaves the gate
23 h 45 apart on the timetable, overnight
AA 4478 leaves 23 h 45 after DL 1716 arrives on the timetable: more than half a day, so not a connection we count.