UA 5873 then CZ 428 at O'Hare
Omaha → Chicago → Shanghai
Timetable, Chicago time
20:29UA 5873 from Omaha at the gate
00:20CZ 428 to Shanghai leaves the gate
3 h 51 apart on the timetable, overnight
The last days
UA 5873 and CZ 428 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.