3 + 7 + 1 (MSY) + 1 (FLL) = 12

No, that's not a quadratic equation. 

It is an update to my previous update to my initial post, "From 3 to 11":

Ft. Lauderdale (FLL) now joins New Orleans, Tampa, Atlanta, Chicago, Baltimore, Pittsburgh, Dallas/Fort Worth, and San Juan as the new cities one can catch direct flights to Cuba.

This new development should go a long way to bringing down the very high prices of flights to Cuba from the current departure cities: Miami, New York, and LA. 

More competition and convenience and less monopoly and manipulation.