Mount Isa Airport — Mount Isa, Australia

ISA is Mount Isa Airport, serving the mining city of Mount Isa in outback Queensland, Australia. Mount Isa is home to one of the world's largest underground mines, producing copper, lead, silver, and zinc, and the airport reflects that industrial backbone through steady fly-in fly-out worker traffic alongside regular passenger service to Brisbane, Townsville, and Cairns. Sitting in a remote, semi-arid stretch of northwest Queensland far from any major coastal city, ISA functions as a critical regional hub for the wider Mount Isa mining district and surrounding pastoral stations. The airport also supports the Royal Flying Doctor Service, which relies on airstrips like ISA to reach patients scattered across Queensland's vast, sparsely populated interior.