AC 7306 then AC 1812 at Toronto Pearson
Dallas-Fort Worth → Toronto → Cancún
Timetable, Toronto time
17:30AC 7306 from Dallas-Fort Worth at the gate
16:10AC 1812 to Cancún leaves the gate
22 h 40 apart on the timetable, overnight
AC 1812 leaves 22 h 40 after AC 7306 arrives on the timetable: more than half a day, so not a connection we count.