CX 3291 then AC 440 at Toronto Pearson
Chicago O'Hare → Toronto → Ottawa
Timetable, Toronto time
07:27CX 3291 from Chicago O'Hare at the gate
07:10AC 440 to Ottawa leaves the gate
23 h 43 apart on the timetable, overnight
AC 440 leaves 23 h 43 after CX 3291 arrives on the timetable: more than half a day, so not a connection we count.