AC 407 then WS 2712 at Toronto Pearson
Montréal → Toronto → Cancún
Timetable, Toronto time
11:45AC 407 from Montréal at the gate
09:25WS 2712 to Cancún leaves the gate
21 h 40 apart on the timetable, overnight
WS 2712 leaves 21 h 40 after AC 407 arrives on the timetable: more than half a day, so not a connection we count.