Des Moines International Airport — Des Moines, United States

Des Moines International Airport, designated DSM, functions as Iowa's busiest air travel hub, anchoring the state capital's connections to major connecting cities across the American Midwest and beyond. Originally developed from a municipal airfield in the early twentieth century, the facility has expanded gradually alongside Des Moines' growth as a center for insurance, finance, and agribusiness headquarters. Its single passenger terminal underwent renovations to modernize security screening and add concessions, though DSM retains the relatively unhurried, easy-to-navigate character typical of mid-sized regional airports rather than sprawling big-city hubs. Seasonal weather, including winter snowstorms and severe spring thunderstorms common to the Corn Belt, occasionally affects operations. Beyond scheduled passenger service from a handful of national carriers, the airport also supports general aviation and charter traffic tied to Iowa's caucus season, when national political attention briefly swells activity well beyond typical volumes.