Wanted to fly JFK-SIN via HKG for three adults on CX 845 and CX 759 leaving JFK on 1/4/13 @ 12:50 AM. Plan on booking three K or H class and then trying to upgrade to business with 40,000 Asia miles each. Currently can only be wait listed for flights to Singapore. Return no problem upgrading (for another 40,000 Asia miles each. What is the chance of getting upgraded if all that is currently available is the wait list? Thanx