There is availability, but SQ is only giving out the lousy 2am flight out of SIN. Unfortunately I will not be able to book for my dad using the promo US AIR miles as a new account has to be active for 12 days before any miles can be purchased. That is too bad, i will end up buying the miles at the regular rate for him. I will book Y class on the 7pm for the outbound and on the 7:55am on the inbound in J class using the points.