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