Just found plenty of availability the first couple of weeks of November, at ~$627 via AA.com. Routing from LAX is double connection on the days I was interested in, typically LAX-PHX-DFW-BOG, or LAX-LAS-DFW-BOG. The only LAX-DFW nonstop was a red-eye, so one would have to camp in DFW for nearly twelve hours.
Good returns though through MIA, including the 777-300ER.