CA 863 then A3 4020 at Athens
Beijing → Athens → Thessaloniki
Timetable, Athens time
08:15CA 863 from Beijing at the gate
18:30A3 4020 to Thessaloniki leaves the gate
10 h 15 apart on the timetable
The last days
CA 863 and A3 4020 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.