| Pioltello to Octeville | 585.01 mi (941.48 km) |
| Pioltello to Oignies | 451.15 mi (726.06 km) |
| Pioltello to Oissel | 467.47 mi (752.32 km) |
| Pioltello to Olivet | 388.12 mi (624.62 km) |
| Pioltello to Ollioules | 237.24 mi (381.80 km) |
| Pioltello to Olonne-sur-Mer | 537.21 mi (864.55 km) |
| Pioltello to Oloron-Sainte-Marie | 515.92 mi (830.29 km) |
| Pioltello to Onet Village | 338.74 mi (545.15 km) |
| Pioltello to Onnaing | 429.27 mi (690.85 km) |
| Pioltello to Orange | 240.80 mi (387.52 km) |
| Pioltello to Orchies | 444.02 mi (714.59 km) |
| Pioltello to Orleans | 388.77 mi (625.67 km) |
| Pioltello to Orly | 395.61 mi (636.68 km) |
| Pioltello to Ormesson-sur-Marne | 391.57 mi (630.17 km) |
| Pioltello to Orsay | 401.97 mi (646.90 km) |
