AA 1997 then AC 524 at O'Hare
St Louis → Chicago → Montréal
Timetable, Chicago time
09:00AA 1997 from St Louis at the gate
15:50AC 524 to Montréal leaves the gate
6 h 50 apart on the timetable
The last days
AA 1997 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 354217:548 h 54 after AA 1997 on the timetable