- Oakhurst to Oaks On Castlereagh, Sydney Central
- Oakville to Oaks On Castlereagh, Sydney Central
- Oatlands to Oaks On Castlereagh, Sydney Central
- Oatley to Oaks On Castlereagh, Sydney Central
- Old Guildford to Oaks On Castlereagh, Sydney Central
- Old Toongabbie to Oaks On Castlereagh, Sydney Central
- Oran Park to Oaks On Castlereagh, Sydney Central
- Orchard Hills to Oaks On Castlereagh, Sydney Central
- Oxford Falls to Oaks On Castlereagh, Sydney Central
- Oxley Park to Oaks On Castlereagh, Sydney Central
- Oyster Bay to Oaks On Castlereagh, Sydney Central
- Sydney Airport to Oaks On Castlereagh, Sydney Central
- Oaks On Castlereagh, Sydney Central to Oakhurst
- Oaks On Castlereagh, Sydney Central to Oakville
- Oaks On Castlereagh, Sydney Central to Oatlands
- Oaks On Castlereagh, Sydney Central to Oatley
- Oaks On Castlereagh, Sydney Central to Old Guildford
- Oaks On Castlereagh, Sydney Central to Old Toongabbie
- Oaks On Castlereagh, Sydney Central to Oran Park
- Oaks On Castlereagh, Sydney Central to Orchard Hills
- Oaks On Castlereagh, Sydney Central to Oxford Falls
- Oaks On Castlereagh, Sydney Central to Oxley Park
- Oaks On Castlereagh, Sydney Central to Oyster Bay
- Oaks On Castlereagh, Sydney Central to Sydney Airport