| Ercolano to Octeville | 985.44 mi (1,585.92 km) |
| Ercolano to Oignies | 862.49 mi (1,388.04 km) |
| Ercolano to Oissel | 873.40 mi (1,405.60 km) |
| Ercolano to Olivet | 783.71 mi (1,261.26 km) |
| Ercolano to Ollioules | 465.49 mi (749.14 km) |
| Ercolano to Olonne-sur-Mer | 895.72 mi (1,441.52 km) |
| Ercolano to Oloron-Sainte-Marie | 784.47 mi (1,262.49 km) |
| Ercolano to Onet Village | 646.08 mi (1,039.76 km) |
| Ercolano to Onnaing | 840.27 mi (1,352.28 km) |
| Ercolano to Orange | 537.72 mi (865.37 km) |
| Ercolano to Orchies | 855.22 mi (1,376.34 km) |
| Ercolano to Orleans | 784.88 mi (1,263.14 km) |
| Ercolano to Orly | 801.53 mi (1,289.93 km) |
| Ercolano to Ormesson-sur-Marne | 798.20 mi (1,284.58 km) |
| Ercolano to Orsay | 806.90 mi (1,298.58 km) |
