Dubai International Airport Terminal 3 is an airport terminal at Dubai International Airport serving Dubai, UAE. When completed and opened on 14 October 2008, it was the largest building in the world and is currently the world's largest airport terminal, with over 1,713,000 m of space. The partly underground Terminal 3 was built at a cost of US$4.5 billion, exclusively for Emirates and has a capacity of 43 million passengers.