Plattsburgh International Airport — Plattsburgh, United States

PBG is Plattsburgh International Airport, located in Plattsburgh, New York, near the shores of Lake Champlain close to the Canadian border. The airport was built on the site of the former Plattsburgh Air Force Base, a Cold War-era Strategic Air Command installation that closed in the 1990s, after which the facility was converted for civilian and cargo use. PBG has served as a budget-friendly alternative airport for travelers in the Montreal area, since it sits just across the border and has attracted low-cost carriers over the years. The airport also supports general aviation and occasional military training activity. PBG's dual military heritage and civilian repurposing make it a notable example of base conversion.