AA 1951 then AA 1140 at Boston
Chicago O'Hare → Boston → Charlotte
Timetable, Boston time
09:29AA 1951 from Chicago O'Hare at the gate
16:49AA 1140 to Charlotte leaves the gate
7 h 20 apart on the timetable
The last days
AA 1951 and AA 1140 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.