Pablo Escobar was a Colombian drug lord, known for influencing Colombian politics towards a no-extradition clause and to grant amnesty to drug barons in exchange for giving up the trade. Pablo Escobar was the richest cocaine trafficker during the 1980s through the early 1990s. The Escobar International Airport is named after him. Coincidentally, in the beginning, Tommy Vercetti is picked up from the same airport to make a cocaine deal.
The little jets at the airport may suggest private jets used to make some of the illegal transactions made by Colombian drug cartels. It has been theorized that Pablo is somehow involved in the drug deals that take place in Vice City. However, this hasn't been demonstrated, but widely speculated among gamers.