AA 363 then AA 2511 at O'Hare
St Louis → Chicago → Boston
Timetable, Chicago time
06:29AA 363 from St Louis at the gate
07:00AA 2511 to Boston leaves the gate
31 min apart on the timetable
The last days
AA 363 and AA 2511 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.