AC 8477 then G7 3376 at O'Hare
Montréal → Chicago → St Louis
Timetable, Chicago time
11:07AC 8477 from Montréal at the gate
11:00G7 3376 to St Louis leaves the gate
23 h 53 apart on the timetable, overnight
G7 3376 leaves 23 h 53 after AC 8477 arrives on the timetable: more than half a day, so not a connection we count.