Enjoy a 50% discount when you redeem your KrisFlyer miles for a Saver award ticket in Economy Class on selected flights and travel from 20 May to 10 July 2015. Let your KrisFlyer miles take you to a choice of destinations around the world – such as London, Maldives, Seoul, Hong Kong, Phuket and more!

Singapore Airlines [SQ] latest promo unfortunately only applies to economy tickets but it’s one of the only few times it makes logical sense to redeem your KrisFlyer miles for economy. A short hop from PER to SIN would set you back only 10k points + a booking fee of AU$ 246.86 for one way and Au$438.72 for a return ticket.

singapore airlines 50 promotion - Singapore Airlines KrisFlyer 50% Redemption Discount

If you work it out vs paying full fare you would save AU$ 220.00 on this particular flight.  BUT… keep in mind you are also spending 20k points on this so depending on how you value these, the saving might actually not be worth it. For me personally 20k points are worth about AU$ 200.00 so I would not redeem them for this flight since for AU$20.00 more I could get status credits + miles for flying. If you do end up going for this offer, keep in mind that your amex platinum edge membership rewards points can be redeemed at a 1:1 basis.