CZ 660 then 3U 1137 at Guangzhou
San Francisco → Guangzhou → Chengdu Shuangliu
Timetable, Guangzhou time
10:25CZ 660 from San Francisco at the gate
18:303U 1137 to Chengdu Shuangliu leaves the gate
8 h 05 apart on the timetable
The last days
CZ 660 and 3U 1137 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.