9C 6891 then 3U 1818 at Guangzhou
Shanghai Hongqiao → Guangzhou → Haikou
Timetable, Guangzhou time
16:009C 6891 from Shanghai Hongqiao at the gate
22:303U 1818 to Haikou leaves the gate
6 h 30 apart on the timetable
The last days
9C 6891 and 3U 1818 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.