ABEX runs DC-9's and 8's from MIA and FLL to the Carib.
IBC Airways runs 402's, SD-360's, and Metros out of MIA
Air Cargo Express runs the SD-330/360 from OPF
Florida Air Cargo has a DC-7 they run from OPF
UPS has a large base at MIA that they got from CAC
Atlas has a MIA Base
Arrow Air runs DC-8's from MIA (They own Fine Air now)
There are a whole bunch of little 402 and Navajo ops around FXE, OPF, TMB
Good Luck
--03M