AA 4209 then AA 3294 at Charlotte
Springfield → Charlotte → Boston
Timetable, Charlotte time
14:44AA 4209 from Springfield at the gate
15:19AA 3294 to Boston leaves the gate
35 min apart on the timetable
The last days
AA 4209 and AA 3294 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.