AA 3524 then CV 251 at O'Hare
Toronto Pearson → Chicago → Dallas-Fort Worth
Timetable, Chicago time
08:39AA 3524 from Toronto Pearson at the gate
22:10CV 251 to Dallas-Fort Worth leaves the gate
13 h 31 apart on the timetable
CV 251 leaves 13 h 31 after AA 3524 arrives on the timetable: more than half a day, so not a connection we count.