My family and I will be doing a short trip to Bali in June, on KLM.
KLM to Bali is a 5th freedom flight from AMS; hence it is actually a AMS-SIN-DPS and DPS-SIN-AMS flight. It is a daily flight:
KL835 – departs Singapore at 1650 and arrives Denpasar at 1925
KL836 – departs Denpasar at 2040 and arrives Singapore at 2320