AA 3166 then AA 468 at Philadelphia
San Francisco → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
05:57AA 3166 from San Francisco at the gate
12:47AA 468 to Chicago O'Hare leaves the gate
6 h 50 apart on the timetable
The last days
AA 3166 and AA 468 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.