| Montesarchio to Octeville | 983.69 mi (1,583.09 km) |
| Montesarchio to Oignies | 856.31 mi (1,378.09 km) |
| Montesarchio to Oissel | 870.31 mi (1,400.63 km) |
| Montesarchio to Olivet | 782.41 mi (1,259.16 km) |
| Montesarchio to Ollioules | 472.37 mi (760.20 km) |
| Montesarchio to Olonne-sur-Mer | 898.91 mi (1,446.66 km) |
| Montesarchio to Oloron-Sainte-Marie | 793.45 mi (1,276.94 km) |
| Montesarchio to Onet Village | 651.54 mi (1,048.55 km) |
| Montesarchio to Onnaing | 833.67 mi (1,341.67 km) |
| Montesarchio to Orange | 542.36 mi (872.84 km) |
| Montesarchio to Orchies | 848.82 mi (1,366.04 km) |
| Montesarchio to Orleans | 783.50 mi (1,260.93 km) |
| Montesarchio to Orly | 798.35 mi (1,284.83 km) |
| Montesarchio to Ormesson-sur-Marne | 794.84 mi (1,279.17 km) |
| Montesarchio to Orsay | 803.97 mi (1,293.86 km) |
