AC 1803 then AA 3610 at Toronto Pearson
Kingston → Toronto → Chicago O'Hare
Timetable, Toronto time
20:25AC 1803 from Kingston at the gate
18:21AA 3610 to Chicago O'Hare leaves the gate
21 h 56 apart on the timetable, overnight
AA 3610 leaves 21 h 56 after AC 1803 arrives on the timetable: more than half a day, so not a connection we count.