F9 3075 then F9 1328 at Charlotte
Baltimore → Charlotte → Philadelphia
Timetable, Charlotte time
13:21F9 3075 from Baltimore at the gate
17:37F9 1328 to Philadelphia leaves the gate
4 h 16 apart on the timetable
The last days
F9 3075 and F9 1328 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.