KALO Waterloo Regional Airport https://www.airnav.com/airport/KALO

Waterloo Regional Airport (IATA: ALO, ICAO: KALO, FAA LID: ALO), also known as Livingston Betsworth Field, is a city owned public use airport located four miles (6 km) northwest of the central business district of Waterloo, a city in Black Hawk County, Iowa, United States.