AC 8477 then UA 3916 at O'Hare
Montréal → Chicago → New Orleans
Timetable, Chicago time
11:07AC 8477 from Montréal at the gate
07:00UA 3916 to New Orleans leaves the gate
19 h 53 apart on the timetable, overnight
UA 3916 leaves 19 h 53 after AC 8477 arrives on the timetable: more than half a day, so not a connection we count.