Originally Posted by Guy Betsy

Another good option is maybe with EVA Airways via TPE. Transit time is around 2 hours only. Though the flight is not daily from Toronto.

If you take AC, your best connecting point is at HKG, where you will connect onto SQ's A380 flight to SIN. Please note however if you book on AC's website, AC will book you onto their codeshare with SQ which is in a booking class that does NOT earn any miles! It doesn't matter what the AC website says, you can't change this.

The only way to make sure that you will get miles connecting onto SIN is to book it as a SQ flight number. You would definitely need the services of a travel agent to do this for you! The fare is the same as AC's website.