CA 814 then SC 7959 at Beijing
Xi'an → Beijing → Kunming
Timetable, Beijing time
14:45CA 814 from Xi'an at the gate
18:35SC 7959 to Kunming leaves the gate
3 h 50 apart on the timetable
The last days
CA 814 and SC 7959 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.