AC 8481 then UA 545 at O'Hare
Montréal → Chicago → Philadelphia
Timetable, Chicago time
14:52AC 8481 from Montréal at the gate
19:45UA 545 to Philadelphia leaves the gate
4 h 53 apart on the timetable
Today
From the airport’s board at 22:33 Chicago time
14:39AC 8481 reached the gate13 min early
21:14UA 545 left the gate1 h 29 late
6 h 35 between the gates
The last days
AC 8481 and UA 545 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.