Kathmandu, 30 June: Two more international airlines are all set to operate  regular flights from Tribhuvan International Airport  (TIA)within this week.Thai Smile Airways of Thailand is making its flight from July 1 and SriLankan Airlines of Sri Lank from July 6. According to the Civil Aviation Authority of Nepal (CAAN), Thai Smile Airways is operating its flight from TIA for the first time while SriLankan Airlines is resuming its flight that was suspended due to Covid-19 pandemic. Thai Smile Airways is operating Kathmandu-Bangkok direct flights from Friday. It has obtained permission to operate flights all the seven days in a week while the SriLankan Airlines will operate seven regular flights in a week. People's News Monitoring Service