BR 658 then TS 426 at Toronto Pearson
Chicago O'Hare → Toronto → Cancún
Timetable, Toronto time
17:39BR 658 from Chicago O'Hare at the gate
14:50TS 426 to Cancún leaves the gate
21 h 11 apart on the timetable, overnight
TS 426 leaves 21 h 11 after BR 658 arrives on the timetable: more than half a day, so not a connection we count.