Cali has never been as good in filling seats to Miami as Bogota or Medellin have, and while the yields may be fine, the fact that Cali was only able to register a mediocre low-60% of load to Miami in the middle of the hottest travelling period of the year just helped to settle the idea.
Added to the above, AA has just completed its first couple of weeks of competition with CO's new daily IAH-CLO service. AA's flight to MIA, however, departs Cali significantly earlier than CO's, so the new 738 service will come with a schedule change, and AA's will then match CO's departure hour.
Effective Dec15/05, MIA-BOG goes to three daily flights indefinitely, 1x AB6 and 2x 757, as was usual only during high-seasons.
MIA-MDE remains with one daily 757 service unchanged.