Des Moines International Airport (IATA: DSM, ICAO: KDSM, FAA LID: DSM) is a public small hub primary located three miles (5 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 and is the closest airport with 18 connections to major airline hubs for people who live throughout much of east-central,
north-central, and southern Iowa.
As of March 2014, Delta Air Lines handled (24%) of DSM passengers, followed by United Airlines (21%), American Airlines (15%), US Airways (14%),
Southwest Airlines (11%), Allegiant Airlines (11%), and Frontier Airlines (3%).
Booming enplanement rates and the aging terminal have led Des Moines International's board to begin planning for further expansion. The present terminal
would be replaced to allow for expanded cargo operations and a planned general aviation runway would be expanded to a full service runway. These plans
are expected to be put into place once the airport handles approximately 3 million passengers a year, or 1.5 million enplanements.