AA 1854 then AA 4547 at O'Hare
San Francisco → Chicago → Boston
Timetable, Chicago time
05:59AA 1854 from San Francisco at the gate
10:54AA 4547 to Boston leaves the gate
4 h 55 apart on the timetable
Today
From the airport’s board at 17:15 Chicago time
06:40AA 1854 reached the gate41 min late
10:47AA 4547 left the gate7 min early
4 h 07 between the gates
The last days
AA 1854 and AA 4547 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.