UA 3882 then CA 3108 at O'Hare
INT → Chicago → Shanghai
Timetable, Chicago time
23:59UA 3882 from INT at the gate
10:20CA 3108 to Shanghai leaves the gate
10 h 21 apart on the timetable, overnight
The last days
UA 3882 and CA 3108 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.