PD 2705 then DL 2646 at O'Hare
Toronto (YTZ) → Chicago → Boston
Timetable, Chicago time
17:40PD 2705 from Toronto (YTZ) at the gate
16:40DL 2646 to Boston leaves the gate
23 h apart on the timetable, overnight
DL 2646 leaves 23 h after PD 2705 arrives on the timetable: more than half a day, so not a connection we count.