

Spirit Airlines flys directly from Ft. Lauderdale to San Salvador International. That means you can avoid having to stopover of going through Nassau to get to San Salvador!
Bahamas Air, of course, is the main flyer to San Salvador; there is one flight daily between Nassau, the capitol, and San Salvador
There are a wide variety of Bahamian private charters companies who will also take you there. Club Med also has flights into San Salvador from Paris, New York and Miami.