TR 121 then 5X 167 at Changi
Wuhan → Singapore → Penang
Timetable, Singapore time
05:25TR 121 from Wuhan at the gate
08:455X 167 to Penang leaves the gate
3 h 20 apart on the timetable
The last days
TR 121 and 5X 167 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.