AA 6486 then UA 4393 at O'Hare
Detroit → Chicago → Tulsa
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
12:45UA 4393 to Tulsa leaves the gate
19 h 16 apart on the timetable, overnight
UA 4393 leaves 19 h 16 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.