Passengers boarding Thai AirAsia's flights at Don Mueang airport. Low cost carriers are taking a larger share in overall passenger traffic through major Thai airports. (Photo: BOONSONG KOSITCHOTETHANA) +++++++++++++++ Published caption:: Passengers board a Thai AirAsia flight at Don Mueang airport, which handles the bulk of Thailand’s LCC passengers. BOONSONG KOSITCHOTETHANA