AA 6486 then AA 2074 at O'Hare
Detroit → Chicago → Boston
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
13:37AA 2074 to Boston leaves the gate
20 h 08 apart on the timetable, overnight
AA 2074 leaves 20 h 08 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.