| Reggello to Oberkirch | 373.54 mi (601.15 km) |
| Reggello to Obernburg am Main | 440.13 mi (708.32 km) |
| Reggello to Obernkirchen | 603.38 mi (971.04 km) |
| Reggello to Oberschleissheim | 315.53 mi (507.80 km) |
| Reggello to Oberstdorf | 264.51 mi (425.69 km) |
| Reggello to Obertraubling | 366.23 mi (589.39 km) |
| Reggello to Obertshausen | 459.03 mi (738.74 km) |
| Reggello to Oberursel | 471.48 mi (758.77 km) |
| Reggello to Ochsenfurt | 418.06 mi (672.80 km) |
| Reggello to Ochsenhausen | 312.66 mi (503.18 km) |
| Reggello to Ochtrup | 621.91 mi (1,000.86 km) |
| Reggello to Odenthal | 548.04 mi (881.99 km) |
| Reggello to Oelde | 584.46 mi (940.60 km) |
| Reggello to Oelsnitz | 466.18 mi (750.25 km) |
| Reggello to Oer-Erkenschwick | 584.64 mi (940.89 km) |
