UA 1888 then BR 658 at O'Hare
Denver → Chicago → Toronto Pearson
Timetable, Chicago time
13:29UA 1888 from Denver at the gate
11:30BR 658 to Toronto Pearson leaves the gate
22 h 01 apart on the timetable, overnight
BR 658 leaves 22 h 01 after UA 1888 arrives on the timetable: more than half a day, so not a connection we count.