Opening hours of Post Office in Farrell Flat, South Australia Opening hours of Post Office in Farrell Flat, South Australia Home / South Australia / Farrell Flat / Post Office Post Office Australia Post - Farrell Flat CPA Farrell Flat, Farrell Flat, South Australia 5416 +61 13 13 18 Categories of local businesses in Farrell Flat Bar Car repair Cemetery Establishment Finance General Contractor Lodging Post Office School