TR 189 then 8B 999 at Changi
Hangzhou → Singapore → Jakarta
Timetable, Singapore time
04:30TR 189 from Hangzhou at the gate
15:308B 999 to Jakarta leaves the gate
11 h apart on the timetable
The last days
TR 189 and 8B 999 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.