AA 9817 then AC 8908 at O'Hare
London → Chicago → Toronto Pearson
Timetable, Chicago time
13:35AA 9817 from London at the gate
20:40AC 8908 to Toronto Pearson leaves the gate
7 h 05 apart on the timetable
The last days
AA 9817 and AC 8908 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.