| Terni to Octeville | 838.42 mi (1,349.31 km) |
| Terni to Oignies | 712.18 mi (1,146.15 km) |
| Terni to Oissel | 724.74 mi (1,166.35 km) |
| Terni to Olivet | 637.44 mi (1,025.86 km) |
| Terni to Ollioules | 346.38 mi (557.44 km) |
| Terni to Olonne-sur-Mer | 759.63 mi (1,222.51 km) |
| Terni to Oloron-Sainte-Marie | 671.49 mi (1,080.66 km) |
| Terni to Onet Village | 518.69 mi (834.76 km) |
| Terni to Onnaing | 689.99 mi (1,110.43 km) |
| Terni to Orange | 408.10 mi (656.77 km) |
| Terni to Orchies | 704.92 mi (1,134.46 km) |
| Terni to Orleans | 638.49 mi (1,027.55 km) |
| Terni to Orly | 652.78 mi (1,050.55 km) |
| Terni to Ormesson-sur-Marne | 649.27 mi (1,044.90 km) |
| Terni to Orsay | 658.41 mi (1,059.60 km) |
