firefly (FY) is a Malaysian airline based at Sultan Abdul Aziz Shah Airport (SZB). Its other primary hub is located at Penang International Airport (PEN), and secondary hubs can be found at Senai International Airport (JHB) and Sultan Ismail Petra Airport (KBR). firefly is a wholly owned subsidiary of Malaysia Airlines (MH). The airline flies to 11 destinations within Malaysia, as well as seven international destinations in Indonesia, Singapore and Thailand. Its fleet consists of 35 ATR 72-500, ATR 72-600 and Boeing 737-400 aircraft.