UA 3501 then AA 3464 at O'Hare
Detroit → Chicago → Nashville
Timetable, Chicago time
06:57UA 3501 from Detroit at the gate
22:35AA 3464 to Nashville leaves the gate
15 h 38 apart on the timetable
AA 3464 leaves 15 h 38 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.