AA 2809 then AA 1550 at Philadelphia
Nashville → Philadelphia → Houston
Timetable, Philadelphia time
09:12AA 2809 from Nashville at the gate
12:28AA 1550 to Houston leaves the gate
3 h 16 apart on the timetable
The last days
AA 2809 and AA 1550 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.