Until recently AA thought enough of its big seats to want $2000ish in July DFW/SXM. In the last week they came down to $1300, which I jumped on, and today down to $1111, which I changed to. Ok, so I have to extend the trip by a day, but I'll manage to get by. There's also a similar price for our April trip, but I refuse to book now with a return layover in MIA of 90 minutes (the better connections are closer to $2000). Uh uh.
Anyway, since my experience AA's DFW fares seem to be the same as left coast fares you west coasters might want to recheck your fares, or book you trips now.