AA 3733 then UA 8108 at O'Hare
Kansas City → Chicago → San Francisco
Timetable, Chicago time
09:05AA 3733 from Kansas City at the gate
20:25UA 8108 to San Francisco leaves the gate
11 h 20 apart on the timetable
The last days
AA 3733 and UA 8108 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.