UA 1791 then AA 948 at San Francisco
San Diego → San Francisco → Chicago O'Hare
Timetable, San Francisco time
11:25UA 1791 from San Diego at the gatealso AZ 4448
14:32AA 948 to Chicago O'Hare leaves the gate
3 h 07 apart on the timetable
The last days
UA 1791 and AA 948 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.