AA 642 then UA 3565 at O'Hare
Dallas-Fort Worth → Chicago → Columbus (Ohio)
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
12:29UA 3565 to Columbus (Ohio) leaves the gate
23 h 19 apart on the timetable, overnight
UA 3565 leaves 23 h 19 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.