Bus number 44 is the local bus line in La Manga, it operates between Veneziola and Cabo de Palos every 30 minutes in summer and every 45 minutes in winter. In the summer the bus runs 24 hours, and on every bus stop you can find the bus schedule. There is also a bus from La Manga to Cartagena, Murcia and Madrid.
For more information about La Manga and the surrounding areas in Murcia region, please check this links:
Murcia tourist office
San Javier tourist office