DL 1605 then AA 3977 at Detroit
Fort Lauderdale → Detroit → Chicago O'Hare
Timetable, Detroit time
15:54DL 1605 from Fort Lauderdale at the gate
13:31AA 3977 to Chicago O'Hare leaves the gate
21 h 37 apart on the timetable, overnight
AA 3977 leaves 21 h 37 after DL 1605 arrives on the timetable: more than half a day, so not a connection we count.