AA 3977 then AC 524 at O'Hare
Detroit → Chicago → Montréal
Timetable, Chicago time
14:05AA 3977 from Detroit at the gate
15:50AC 524 to Montréal leaves the gate
1 h 45 apart on the timetable
The last days
AA 3977 and AC 524 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.
Later flights to Montréal
UA 354217:543 h 49 after AA 3977 on the timetable