Voranate Laprabang, acting chief executive officer, said the subsidiary of Thai Airways International (THAI) would reposition from light premium airline to premium full-service carrier.
He said the airline would work more closely on business planning and marketing with THAI to strengthen competitiveness on existing routes and new networks.
By next month, Thai Smile plans to operate to five more destinations: Mandalay, Hyderabad, Nanning, Chongqing and Changsha.