UA 3915 then AA 569 at O'Hare
Miami → Chicago → Dallas-Fort Worth
Timetable, Chicago time
22:25UA 3915 from Miami at the gate
17:59AA 569 to Dallas-Fort Worth leaves the gate
19 h 34 apart on the timetable, overnight
AA 569 leaves 19 h 34 after UA 3915 arrives on the timetable: more than half a day, so not a connection we count.