AC 7055 then AC 1889 at Toronto Pearson
Montréal → Toronto → Mexico City
Timetable, Toronto time
08:35AC 7055 from Montréal at the gate
20:55AC 1889 to Mexico City leaves the gate
12 h 20 apart on the timetable
AC 1889 leaves 12 h 20 after AC 7055 arrives on the timetable: more than half a day, so not a connection we count.