- Oakhurst to Park Regis City Centre
- Oakville to Park Regis City Centre
- Oatlands to Park Regis City Centre
- Oatley to Park Regis City Centre
- Old Guildford to Park Regis City Centre
- Old Toongabbie to Park Regis City Centre
- Oran Park to Park Regis City Centre
- Orchard Hills to Park Regis City Centre
- Oxford Falls to Park Regis City Centre
- Oxley Park to Park Regis City Centre
- Oyster Bay to Park Regis City Centre
- Sydney Airport to Park Regis City Centre
- Park Regis City Centre to Oakhurst
- Park Regis City Centre to Oakville
- Park Regis City Centre to Oatlands
- Park Regis City Centre to Oatley
- Park Regis City Centre to Old Guildford
- Park Regis City Centre to Old Toongabbie
- Park Regis City Centre to Oran Park
- Park Regis City Centre to Orchard Hills
- Park Regis City Centre to Oxford Falls
- Park Regis City Centre to Oxley Park
- Park Regis City Centre to Oyster Bay
- Park Regis City Centre to Sydney Airport