AA 970 then AA 1526 at Philadelphia
Chicago O'Hare → Philadelphia → Houston
Timetable, Philadelphia time
09:39AA 970 from Chicago O'Hare at the gate
12:53AA 1526 to Houston leaves the gate
3 h 14 apart on the timetable
The last days
AA 970 and AA 1526 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.