8L 9975 then 3U 1818 at Guangzhou
Kunming → Guangzhou → Haikou
Timetable, Guangzhou time
20:008L 9975 from Kunming at the gate
22:303U 1818 to Haikou leaves the gate
2 h 30 apart on the timetable
The last days
8L 9975 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.