New Century AirCenter (IATA: JCI, ICAO: KIXD, FAA LID: IXD), formerly known as Naval Air Station Olathe, Flatley Field and Johnson County Industrial Airport, is a joint civil-military general aviation airport located four miles (6 km) southwest of the central business district of Olathe, a city in Johnson County, Kansas, United States. Measured by number of aircraft operations, the facility was the second-busiest airport in the state of Kansas in 2019.

Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, New Century AirCenter is assigned IXD by the FAA and JCI by the IATA (which assigned IXD to Bamrauli Airport in Allahabad, India). The airport's ICAO identifier is KIXD.

The airport’s codes were derived from its name of Johnson County Industrial Airport. The county originally sought the “IND” designation for its “industrial” name but that identifier went to Indianapolis International Airport. The county then sought an “IJC” code based on the Johnson County name but that was rejected as too similar to the OJC code of the neighboring Johnson County Executive Airport (which was previously a naval auxiliary landing field, or NALF, under the control of Naval Air Station Olathe). As a civilian facility, the airport was assigned the closest available industrial code "IXD." The previous FAA code for Naval Air Station Olathe was NUU and the ICAO code KNUU.