AC 7301 then DL 2570 at O'Hare
Montréal → Chicago → Boston
Timetable, Chicago time
11:35AC 7301 from Montréal at the gate
10:35DL 2570 to Boston leaves the gate
23 h apart on the timetable, overnight
DL 2570 leaves 23 h after AC 7301 arrives on the timetable: more than half a day, so not a connection we count.