High Quality Content by WIKIPEDIA articles! Des Moines International Airport (IATA: DSM, ICAO: KDSM, FAA LID: DSM) is a public-use airport located three nautical miles (6 km) southwest of the central business district of Des Moines, a city in Polk County, Iowa, United States. The airport serves the Des Moines metropolitan area with 19 connections to major airline hubs. In 2011, it was reported that DSM is now the 85th busiest airport in the United States by passenger traffic.