| The Hills to Octeville | 3,467.99 mi (5,581.18 km) |
| The Hills to Oignies | 3,640.82 mi (5,859.34 km) |
| The Hills to Oissel | 3,590.01 mi (5,777.56 km) |
| The Hills to Olivet | 3,662.22 mi (5,893.78 km) |
| The Hills to Ollioules | 3,973.53 mi (6,394.78 km) |
| The Hills to Olonne-sur-Mer | 3,536.73 mi (5,691.81 km) |
| The Hills to Oloron-Sainte-Marie | 3,679.56 mi (5,921.67 km) |
| The Hills to Onet Village | 3,790.45 mi (6,100.13 km) |
| The Hills to Onnaing | 3,667.64 mi (5,902.49 km) |
| The Hills to Orange | 3,896.01 mi (6,270.02 km) |
| The Hills to Orchies | 3,650.94 mi (5,875.63 km) |
| The Hills to Orleans | 3,661.56 mi (5,892.71 km) |
| The Hills to Orly | 3,660.02 mi (5,890.23 km) |
| The Hills to Ormesson-sur-Marne | 3,665.06 mi (5,898.34 km) |
| The Hills to Orsay | 3,652.54 mi (5,878.20 km) |
