AA 1954 then AA 4487 at O'Hare
San Francisco → Chicago → Houston
Timetable, Chicago time
05:59AA 1954 from San Francisco at the gate
06:59AA 4487 to Houston leaves the gate
1 h apart on the timetable
The last days
AA 1954 and AA 4487 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.