AA 1252 then AC 7255 at Miami
Philadelphia → Miami → Toronto
Timetable, Miami time
08:59AA 1252 from Philadelphia at the gate
12:13AC 7255 to Toronto leaves the gate
3 h 14 apart on the timetable
The last days
AA 1252 and AC 7255 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.