AA 5543 then DL 5401 at Charlotte
Pittsburgh → Charlotte → Boston
Timetable, Charlotte time
12:39AA 5543 from Pittsburgh at the gate
16:35DL 5401 to Boston leaves the gate
3 h 56 apart on the timetable
The last days
AA 5543 and DL 5401 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.