MIA is awful for lounges but its doubtful as MIA is not a star alliance hub and even with AA from OW Caribbean, Mexico and Canadian and US Departures are excluded from lounge access for Business passengers which i learnt the hard way by trying to get into the lounge during my 3.5 hour layover in Miami on my AUA-YYZ flights this past december on AA and they wouldn't let me cuz it wasn't considered an "International" flight even though i bought a biz class ticket so my opinion with *A is that its going to be doubtful