AA 866 then AA 3141 at O'Hare
Boston → Chicago → San Francisco
Timetable, Chicago time
15:37AA 866 from Boston at the gate
17:10AA 3141 to San Francisco leaves the gate
1 h 33 apart on the timetable
The last days
AA 866 and AA 3141 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.