ET 638 then 8B 999 at Changi
Addis Ababa → Singapore → Jakarta
Timetable, Singapore time
14:50ET 638 from Addis Ababa at the gate
15:308B 999 to Jakarta leaves the gate
40 min apart on the timetable
The last days
ET 638 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.