Originally Posted by
jmw2323
is there any fee to exchange AC for US?
There is no fee when for an exchange. The minimum AC to US is 15k miles. I don't know if there is a max, but I think it has been reported that you can do multiple transfers in succession.
Before you commit to any of these programs you should consider them carefully. None of the programs are as nice as UA, but they all have their strengths so do ask questions about routings, cost, and cash.