UA 3375 then AA 32 at O'Hare
St Louis → Chicago → San Diego
Timetable, Chicago time
13:30UA 3375 from St Louis at the gate
19:45AA 32 to San Diego leaves the gate
6 h 15 apart on the timetable
The last days
UA 3375 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.