UA 4740 then AA 32 at O'Hare
Milwaukee → Chicago → San Diego
Timetable, Chicago time
13:15UA 4740 from Milwaukee at the gate
19:45AA 32 to San Diego leaves the gate
6 h 30 apart on the timetable
The last days
UA 4740 and AA 32 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.