While JetBlue plants eleven new flags in Fort Lauderdale, Frontier just quietly took Spirit’s most overlooked Caribbean prize. Almost nobody noticed. JetBlue Adds Routes From Fort Lauderdale JetBlue’s Fort Lauderdale announcement was one of many route announcements in the wake of Spirit’s collapse. The carrier added eleven destinations , scaled to roughly 130 daily departures from FLL, and offered Spirit’s silver and gold elites a status match into TrueBlue Mosaic. Part of the merger concern with Spirit and JetBlue was a combined presence in Orlando and Fort Lauderdale. But now without the merger, JetBlue is filling service gaps, at least in south Florida, Central Florida may be next. San Juan Was A Significant Spirit Station Spirit’s San Juan operation was the second largest Caribbean network of any US carrier, behind only American’s. Spirit ran nonstop service from SJU to Orlando, Fort Lauderdale, Tampa, Hartford, Newark, Boston, and the Dominican Republic.…