| Pioltello to Oerlinghausen | 447.83 mi (720.72 km) |
| Pioltello to Oestrich-Winkel | 317.01 mi (510.19 km) |
| Pioltello to Offenburg | 215.33 mi (346.54 km) |
| Pioltello to Oftersheim | 269.71 mi (434.05 km) |
| Pioltello to Ohrdruf | 373.72 mi (601.45 km) |
| Pioltello to Ohringen | 255.76 mi (411.61 km) |
| Pioltello to Olbernhau | 401.76 mi (646.57 km) |
| Pioltello to Olching | 208.75 mi (335.96 km) |
| Pioltello to Oldenburg | 530.52 mi (853.80 km) |
| Pioltello to Oldenburg in Holstein | 611.88 mi (984.73 km) |
| Pioltello to Olfen | 438.63 mi (705.91 km) |
| Pioltello to Olpe | 387.34 mi (623.36 km) |
| Pioltello to Olsberg | 406.06 mi (653.49 km) |
| Pioltello to Oranienburg | 531.19 mi (854.87 km) |
| Pioltello to Ortenberg | 335.75 mi (540.34 km) |
