| Modica to Octeville | 1,202.64 mi (1,935.46 km) |
| Modica to Oignies | 1,105.66 mi (1,779.38 km) |
| Modica to Oissel | 1,100.25 mi (1,770.68 km) |
| Modica to Olivet | 1,001.44 mi (1,611.67 km) |
| Modica to Ollioules | 639.95 mi (1,029.90 km) |
| Modica to Olonne-sur-Mer | 1,079.68 mi (1,737.58 km) |
| Modica to Oloron-Sainte-Marie | 921.09 mi (1,482.35 km) |
| Modica to Onet Village | 820.47 mi (1,320.41 km) |
| Modica to Onnaing | 1,085.60 mi (1,747.10 km) |
| Modica to Orange | 724.07 mi (1,165.28 km) |
| Modica to Orchies | 1,099.49 mi (1,769.46 km) |
| Modica to Orleans | 1,003.04 mi (1,614.24 km) |
| Modica to Orly | 1,029.92 mi (1,657.50 km) |
| Modica to Ormesson-sur-Marne | 1,027.70 mi (1,653.92 km) |
| Modica to Orsay | 1,033.85 mi (1,663.82 km) |
