AC 748 then DL 5622 at Boston
Montréal → Boston → Richmond
Timetable, Boston time
09:48AC 748 from Montréal at the gate
08:50DL 5622 to Richmond leaves the gate
23 h 02 apart on the timetable, overnight
DL 5622 leaves 23 h 02 after AC 748 arrives on the timetable: more than half a day, so not a connection we count.