The Aero Commander 690 was developed from the Aero Commander 500, and was an improved version of the 680 with pressurization and turboprop powered.

Model 690A  First produced in 1973, the 690A represented a significant advancement for turboprop Twin Commander aircraft. This model used the more powerful 251K variant of the AiResearch TPE331 power plant and Hartzell propellers. Airframe changes included an increase of 30 inches at the center wing section, increased rudder area, enlarged dorsal fin and longer tail cone. These changes allowed for a gross weight rating of 9,600 and baggage capacity of 600 lbs., the highest for a Twin Commander. Other changes such as the addition of a heated windshield, increased cabin pressure differential and standard de-icing equipment, changed the maximum ceiling rating from 25,000 feet to 31,000 feet.

Model 690B First flew in 1976 and was similar to the 690A with increased weight ratings, two engine options and several modifications to the cabin interior including larger baggage space.