Iowa City Municipal Airport (ICAO: KIOW / IATA: IOW) is a public airport two miles southwest of downtown Iowa City, in Johnson County, Iowa. It is the civil airport west of the Mississippi River still in its original location. Iowa Airport is 683 ft / 208 m AMSL above.Iowa City Municipal Airport (ICAO: KIOW / IATA: IOW) is a public airport two miles southwest of downtown Iowa City, in Johnson County, Iowa. It is the civil airport west of the Mississippi River still in its original location. Iowa Airport is 683 ft / 208 m AMSL above.