AC 7041 then AC 1884 at Montréal
Washington → Montréal → Cancún
Timetable, Montréal time
00:07AC 7041 from Washington at the gate
17:55AC 1884 to Cancún leaves the gate
17 h 48 apart on the timetable
AC 1884 leaves 17 h 48 after AC 7041 arrives on the timetable: more than half a day, so not a connection we count.