UA 5424 then BR 658 at O'Hare
Washington National → Chicago → Toronto Pearson
Timetable, Chicago time
14:33UA 5424 from Washington National at the gate
11:30BR 658 to Toronto Pearson leaves the gate
20 h 57 apart on the timetable, overnight
BR 658 leaves 20 h 57 after UA 5424 arrives on the timetable: more than half a day, so not a connection we count.