AC 507 then UA 4645 at O'Hare
Toronto Pearson → Chicago → Fort Wayne
Timetable, Chicago time
15:38AC 507 from Toronto Pearson at the gate
11:25UA 4645 to Fort Wayne leaves the gate
19 h 47 apart on the timetable, overnight
UA 4645 leaves 19 h 47 after AC 507 arrives on the timetable: more than half a day, so not a connection we count.