CZ 660 then ZH 1829 at Guangzhou
San Francisco → Guangzhou → Shanghai Hongqiao
Timetable, Guangzhou time
10:25CZ 660 from San Francisco at the gate
16:20ZH 1829 to Shanghai Hongqiao leaves the gatealso SC 5450
5 h 55 apart on the timetable
The last days
CZ 660 and ZH 1829 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.