Pierre Regional Airport — Pierre, United States

PIR, Pierre Regional Airport, serves Pierre, the capital city of South Dakota, providing essential air links for state government travel and the surrounding central South Dakota ranching and agricultural region. The airport operates under the Essential Air Service program, with subsidized flights connecting Pierre to Denver, ensuring the state capital retains reliable commercial air access despite its small population. PIR also supports general aviation, agricultural spraying operations, and occasional flights tied to state legislative sessions when officials travel to and from the capitol. Its single runway and small terminal are typical of a state capital that, unlike most others, remains a relatively small city reliant on regional air service.