From Colombo airport fly to Diyawanna Oya airport then taxi to Bentota. 1 h 12 min $169. From Katunayake Airport Bus Station line 187 bus to Colombo Bastian Mawatha Bus Terminal, walk to Colombo Fort, then train to Aluthgama. 2 h 53 min $1. From Colombo Airport (CMB) taxi to Bentota. 1 h 22 min $66. From Colombo Airport (CMB) drive to Bentota. 1 h 22 min $10.