Hoping to get some help with booking last minute First/Business award flights from New York to Southeast Asia (23 Nov to 4th Jan) for two people (our honeymoon trip). We're flexible on what airport we start our trip in (Singapore, Bangkok, Chang Mai etc) and I have miles across AMEX (300K), Chase (450K), BA (120K), Marriott (300K) but trying to find award availability on anything other than some of the lesser recommended airlines has been really tough. I've been accumulating these miles but have never really been able to figure out the best way to use them. Any advice on the the best way to go about this given where my miles are based?