AA 6331 then UA 8108 at O'Hare
Burlington (BTV) → Chicago → San Francisco
Timetable, Chicago time
08:59AA 6331 from Burlington (BTV) at the gate
20:25UA 8108 to San Francisco leaves the gate
11 h 26 apart on the timetable
The last days
AA 6331 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.