UA 6104 then AC 8478 at O'Hare
South Bend → Chicago → Montréal
Timetable, Chicago time
19:00UA 6104 from South Bend at the gate
07:05AC 8478 to Montréal leaves the gate
12 h 05 apart on the timetable, overnight
AC 8478 leaves 12 h 05 after UA 6104 arrives on the timetable: more than half a day, so not a connection we count.