Three crew members have been hospitalised after they were launched into the air when a Delta flight from Los Angeles to Sydney hit turbulence this morning.A Delta Air Lines A350, with 245 passengers and 15 crew members on board, encountered "brief turbulence" during descent but was able to safely land.The airline said four flight attendants and no passengers were injured in the commotion.READ MORE: Albanese heckled, protester thrown out after commotion at Lakemba MosqueA Delta Air Lines aircraft.