UA 3922 then CA 8412 at O'Hare
Tampa → Chicago → Shanghai
Timetable, Chicago time
11:35UA 3922 from Tampa at the gate
22:15CA 8412 to Shanghai leaves the gate
10 h 40 apart on the timetable
The last days
UA 3922 and CA 8412 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.