The last of ten Titan I launches from LC-15 occurred in September 1960. Following this, it was converted for use by the Titan II, which made the first of sixteen flights from the complex in June 1962. The last launch from LC-15 occurred on 9 April 1964.
Following the last launch, LC-15 remained active until its retirement from service in March 1967. Much of the complex, including the tower, launch stand and errector was demolished in June 1967. The blockhouse, cable tunnel, and parts of the launch table and ramp were abandoned in place, and are still standing.