CLT. At the time I booked, there weren't any routings through MIA outbound. I was initially scheduled to return through CLT also but AA changed the times so that I had slightly over an hour in CLT. Even though I have Global Entry, I wasn't sure that was enough time so changed it. So returning, I'm now going SXM-MIA-DFW-PDX with an overnight in DFW. I'm kind of sorry now that I changed it as a friend with Global Entry said she went through everything in ten minutes in CLT.