AA 470 then AA 1143 at Charlotte
Baltimore → Charlotte → Boston
Timetable, Charlotte time
07:20AA 470 from Baltimore at the gate
13:30AA 1143 to Boston leaves the gate
6 h 10 apart on the timetable
The last days
AA 470 and AA 1143 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.