ElmhurstNick, MIA-MAD is one of AA's single most profitable and important routes. Not only does it feed AA's Central American flights (as well as Iberia flights. Iberia has a hub in Miami and codeshares with AA for a total of three daily flights, soon to be four), but the ties between Miami and Madrid are huge. That's why the flight was moved to Miami from Dallas. Iberia is rumoured to be planning on leasing two A380s from IFLC to use on MIA-MAD. In fact, with all the extra 777s AA is going to have, look for MIA-MAD, as well as MIA-CDG, to go 777 within six months.