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