Originally Posted by
bsb7140
No, you don't need to tell them you plan to enter Singapore - they also don't care. Simply deplane and head for immigration. Yes, you should be checked all the way through to MAA. If for some reason you are not, simply stop by a transfer counter in Changi before exiting immigration. As far as how early you should arrive before your next flight? No more than 90 minutes is necessary.