Can someone please explain the difference between Business Class and First Class? We have tickets on American this year (still hoping to be able to make it) our first leg BDL - MIA is First Class while MIA-AUA is called Business Class. The 2 flights we have the same seat numbers, I was told that Business is still first class and it is called business because this airplane does not have a First Class section? We used our miles to purchase both of these flights. I know this probably sounds confusing but maybe someone explain better? Thanks in advance.