I reserved an "o" class fare from Miami to Joahannesburg via Heathrow (non refundable, $ to make changes, but upgradeable) for an international flight in March, 8 months out. Before paying, I called in to make sure I could upgrade using mileage award.(Neither my partner or I can fly such a long time in economy -we are in our 70's with leg swelling, etc.) Was told No award seats available in Business. I could be wait listed in case of cancellation. I understand the seats in business are not sold, but reserved for the possible cash buyer. Anyone care to guess what the chances are that we will be able to get 2 seats with miles within an 8-month period? If we can't upgrade, we can't travel-and so we would lose the price of the ticket. Any thoughts?