AA 9781 then AA 9953 at Philadelphia
New York LaGuardia → Philadelphia → Knoxville
Timetable, Philadelphia time
06:00AA 9781 from New York LaGuardia at the gate
10:00AA 9953 to Knoxville leaves the gate
4 h apart on the timetable
The last days
AA 9781 and AA 9953 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.