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