Missoula International Airport/Johnson Bell Field is a public airport located four miles (6 km) northwest of the city of Missoula in Missoula County, Montana, USA. The airport has two runways. There are currently several expansion projects planned or underway, including the construction of 150 foot control tower. An expansion of the terminal building, providing a new security screening area, was completed in 2007. 565,000 passengers passed through the airport in 2007.