AC 1803 then AA 4438 at Toronto Pearson
Kingston → Toronto → New York LaGuardia
Timetable, Toronto time
20:25AC 1803 from Kingston at the gate
19:40AA 4438 to New York LaGuardia leaves the gate
23 h 15 apart on the timetable, overnight
AA 4438 leaves 23 h 15 after AC 1803 arrives on the timetable: more than half a day, so not a connection we count.