AA 2065 then UA 3376 at O'Hare
San Diego → Chicago → St Louis
Timetable, Chicago time
04:49AA 2065 from San Diego at the gate
11:00UA 3376 to St Louis leaves the gate
6 h 11 apart on the timetable
The last days
AA 2065 and UA 3376 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.