Join Date: Feb 1999
Location: San Jose, California, USA
Programs: AS Plat, UA MM, AA MM, IC Plat, Marriott Gold, Hilton Gold, Hyatt Globalist
Posts: 3,162
I just did a quick calculation (based on the $500 I'd pay for USA-Australia) and came up with a rough figure of $35/hour to upgrade from coach to biz.
I've never actually done an upgrade for cash, because they have always been more expensive than what I would pay.