UA 3539 then AC 7055 at Montréal
Washington → Montréal → Toronto Pearson
Timetable, Montréal time
15:16UA 3539 from Washington at the gate
07:00AC 7055 to Toronto Pearson leaves the gate
15 h 44 apart on the timetable, overnight
AC 7055 leaves 15 h 44 after UA 3539 arrives on the timetable: more than half a day, so not a connection we count.