The Thai government gave a budget of about 150,000 million baht (US$4.9 billion or 3.7 billion euro) to build this international airport. This included investment of Government service and State Enterprises of 137,000 million baht ($4.46 billion), and private company about 13,000 million baht ($423 million). The airport could support the passengers more than 45 million people. It was designed by Helmut Jahn.