AA 3035 then AA 2253 at San Francisco
Philadelphia → San Francisco → Chicago O'Hare
Timetable, San Francisco time
14:14AA 3035 from Philadelphia at the gate
17:27AA 2253 to Chicago O'Hare leaves the gatealso QF 4756
3 h 13 apart on the timetable
The last days
AA 3035 and AA 2253 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.