Silk Air is a no frills lowcost air carrier. Search here for cheap airline tickets from Langkawi, Malaysia to:

Cambodia - Phnom Penh or Siem Reap
China - Chendu, Chongqing, Fuzhou, Kunming, Macua, Xiamen
India - Hyderabad, Kochi,Thiruvananthapuram
Myanmar - Yangon
Philippines - Cebu, Davao
Singapore
Thailand - Chiang Mai, Krabi, Phuket