| Naples to Octeville | 980.07 mi (1,577.27 km) |
| Naples to Oignies | 857.58 mi (1,380.15 km) |
| Naples to Oissel | 868.15 mi (1,397.16 km) |
| Naples to Olivet | 778.31 mi (1,252.56 km) |
| Naples to Ollioules | 459.78 mi (739.94 km) |
| Naples to Olonne-sur-Mer | 890.06 mi (1,432.41 km) |
| Naples to Oloron-Sainte-Marie | 778.80 mi (1,253.36 km) |
| Naples to Onet Village | 640.37 mi (1,030.58 km) |
| Naples to Onnaing | 835.42 mi (1,344.48 km) |
| Naples to Orange | 532.02 mi (856.21 km) |
| Naples to Orchies | 850.34 mi (1,368.49 km) |
| Naples to Orleans | 779.48 mi (1,254.45 km) |
| Naples to Orly | 796.29 mi (1,281.50 km) |
| Naples to Ormesson-sur-Marne | 792.98 mi (1,276.18 km) |
| Naples to Orsay | 801.64 mi (1,290.11 km) |
