I don’t have Chase Ultimate Rewards transfer data point. But my Citi Thank You points transfer to KrisFlyer took 2.5 days. Thankfully the Advantage redemption was still available after 2.5 days. I didn’t see any option to hold award either.

How much cheaper is it via Aeroplan? I also saw Aeroplan availability for one of our trips but still opted to book via KrisFlyer. In case of award changes, IRROPS, etc., I wanted to be sure I could talk directly to Singapore Airlines without them telling me to seek help from where I purchased/redeemed award.