CA 4517 then CZ 6686 at Pudong
Chengdu → Shanghai → Haikou
Timetable, Shanghai time
12:35CA 4517 from Chengdu at the gate
16:10CZ 6686 to Haikou leaves the gate
3 h 35 apart on the timetable
The last days
CA 4517 and CZ 6686 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.