AC 1803 then AC 8620 at Toronto Pearson
Kingston → Toronto → Washington
Timetable, Toronto time
20:25AC 1803 from Kingston at the gate
18:40AC 8620 to Washington leaves the gate
22 h 15 apart on the timetable, overnight
AC 8620 leaves 22 h 15 after AC 1803 arrives on the timetable: more than half a day, so not a connection we count.