The discount carrier has started twice daily nonstop flights to Los Angeles International and is offering one-way sale fares as low as $109. To get the special fares you must book before June 27 and travel between Sept. 8 and Nov. 11. JetBlue announced plans to launch the service in February after pulling back on LAX expansion in May of last year, citing the high cost of fuel and other start-up expenses. And starting tomorrow JetBlue will begin its previously announced nonstop service to Santo Domingo in the Dominican Republic. To mark the occasion, Boston's favorite Santo Domingan, Red Sox star David Ortiz, will be at Logan to greet passengers boarding the first flight.