AA 1739 then AA 1376 at Philadelphia
St Louis → Philadelphia → Pittsburgh
Timetable, Philadelphia time
14:40AA 1739 from St Louis at the gate
19:39AA 1376 to Pittsburgh leaves the gate
4 h 59 apart on the timetable
The last days
AA 1739 and AA 1376 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.
Later flights to Pittsburgh
AA 319521:507 h 10 after AA 1739 on the timetable