| Reggiolo to Oberkirch | 281.38 mi (452.84 km) |
| Reggiolo to Obernburg am Main | 349.06 mi (561.75 km) |
| Reggiolo to Obernkirchen | 513.68 mi (826.68 km) |
| Reggiolo to Oberschleissheim | 233.04 mi (375.05 km) |
| Reggiolo to Oberstdorf | 174.16 mi (280.28 km) |
| Reggiolo to Obertraubling | 286.91 mi (461.74 km) |
| Reggiolo to Obertshausen | 367.64 mi (591.67 km) |
| Reggiolo to Oberursel | 379.86 mi (611.32 km) |
| Reggiolo to Ochsenfurt | 328.92 mi (529.34 km) |
| Reggiolo to Ochsenhausen | 221.90 mi (357.11 km) |
| Reggiolo to Ochtrup | 530.04 mi (853.01 km) |
| Reggiolo to Odenthal | 455.80 mi (733.55 km) |
| Reggiolo to Oelde | 493.22 mi (793.77 km) |
| Reggiolo to Oelsnitz | 385.15 mi (619.84 km) |
| Reggiolo to Oer-Erkenschwick | 492.61 mi (792.78 km) |
