AA 2146 then UA 2432 at O'Hare
Boston → Chicago → Charlotte
Timetable, Chicago time
08:00AA 2146 from Boston at the gate
17:45UA 2432 to Charlotte leaves the gate
9 h 45 apart on the timetable
The last days
AA 2146 and UA 2432 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.