[1] In the 1950s, developers began building housing beneath Mueller's flight paths and airport traffic increased as the city grew.

In 1963, Continental was flying Vickers Viscount turboprops Houston Hobby Airport – Austin – San Angelo – Midland/Odessa – El Paso – Tucson – Phoenix – Los Angeles and direct to Lubbock and Amarillo.

By 1968, Trans-Texas Airways was operating Douglas DC-9-10s to Mueller with nonstops to Dallas Love Field, Houston Hobby and San Antonio and direct to New Orleans, Memphis, Little Rock and Corpus Christi.

All of the Continental service was being operated with Boeing 727-200s, nonstop three times a day to Houston Intercontinental Airport and to Midland/Odessa, and one stop to Miami and El Paso.

Worth International Airport, Houston Intercontinental, Lubbock and San Antonio with one-stops to Albuquerque, Amarillo, Corpus Christi, Laredo and Little Rock.

Texas International also flew direct, multi-stop DC-9s to Denver and Los Angeles and nonstop Convair 600 turboprops to Houston in addition to its DC-9 service on the route.

Worth, and San Antonio while USAir was flying nonstop to Houston Intercontinental with one flight a day operated with a Boeing 737-200 with direct, one stop service to Pittsburgh.

The terminal and control tower were dedicated in a ceremony attended by Vice President Lyndon B. Johnson and Austin Mayor Lester Palmer.

Whether the aging Mueller should be relocated to Manor, Texas, was a perennial issue in Austin politics, until the closure of Bergstrom Air Force Base opened another possibility.

[20] The primary runway, designed for military cargo and high-performance jets, was left intact and required little work to return to serviceable condition.

[21] The 711 acres (3 km2)[22] of land that once housed the airport sat vacant and unused for more than half a decade until the city approved a development plan.

[24] Robert Mueller Municipal Airport also left behind about 20 acres and 10,000 square feet of hangar buildings that have been converted into sound stages and renamed Austin Studios.