| Reggiolo to Oerlinghausen | 496.92 mi (799.71 km) |
| Reggiolo to Oestrich-Winkel | 374.99 mi (603.49 km) |
| Reggiolo to Offenburg | 280.73 mi (451.79 km) |
| Reggiolo to Oftersheim | 325.08 mi (523.17 km) |
| Reggiolo to Ohrdruf | 408.46 mi (657.35 km) |
| Reggiolo to Ohringen | 302.35 mi (486.59 km) |
| Reggiolo to Olbernhau | 414.04 mi (666.33 km) |
| Reggiolo to Olching | 228.09 mi (367.08 km) |
| Reggiolo to Oldenburg | 580.44 mi (934.13 km) |
| Reggiolo to Oldenburg in Holstein | 648.33 mi (1,043.39 km) |
| Reggiolo to Olfen | 495.47 mi (797.38 km) |
| Reggiolo to Olpe | 443.39 mi (713.57 km) |
| Reggiolo to Olsberg | 457.27 mi (735.91 km) |
| Reggiolo to Oranienburg | 552.52 mi (889.19 km) |
| Reggiolo to Ortenberg | 384.62 mi (618.98 km) |
