Quick turnaround HKIA
 

Hi all:

I am planning to do a milage run to HK from Singapore, arriving in the morning and leaving in the afternoon. If I have both boarding passes can I not go through customs/immigration and just go to the transfer area to hop on the return flight? Or would I have to go through customs and immigration upstairs and check in again?

Thanks!

No problem staying airside and just going through transit security to the departures level.