Sky Harbor International Airport is Arizona’s largest airport, and one of the busiest in the U.S. Here are 5 fun facts about Sky Harbor you probably don't know! "The Farm"Back in 1928 when Sky Harbor was built, Phoenix was still a relatively small city surrounded by long stretches of farmland and desert. It was built in 1952, and it just couldn't keep up with Phoenix Arizona's rapid expansion and was demolished in 1990. The First National Bank of Arizona set up in Sky Harbor, giving travelers on‑site financial access before ATMs were invented.