AA 4955 then AA 1948 at O'Hare
Lexington → Chicago → San Francisco
Timetable, Chicago time
05:59AA 4955 from Lexington at the gate
10:30AA 1948 to San Francisco leaves the gate
4 h 31 apart on the timetable
The last days
AA 4955 and AA 1948 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.