Originally Posted by vernonc

Your options are :
1) Call AC and upfare to Biz. i.e. pay the difference. This is obviously the guaranteed route.
2) LMU - offered from AC to move to biz.
3) Bid uograde - if you absolutely want biz then put in a higher amount than the min. Sometimes they will offer an immediate comfirmation to biz for a set amount that is shown,