AA 5181 then DL 5409 at Charlotte
Washington → Charlotte → Boston
Timetable, Charlotte time
06:38AA 5181 from Washington at the gate
07:05DL 5409 to Boston leaves the gate
27 min apart on the timetable
The last days
AA 5181 and DL 5409 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.