AA 41 then AA 4100 at O'Hare
Barcelona → Chicago → Allentown
Timetable, Chicago time
14:05AA 41 from Barcelona at the gate
15:00AA 4100 to Allentown leaves the gate
55 min apart on the timetable
The last days
AA 41 and AA 4100 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.