| Rieti to Oberkirch | 482.28 mi (776.16 km) |
| Rieti to Obernburg am Main | 543.51 mi (874.69 km) |
| Rieti to Obernkirchen | 703.28 mi (1,131.82 km) |
| Rieti to Oberschleissheim | 408.71 mi (657.75 km) |
| Rieti to Oberstdorf | 368.06 mi (592.33 km) |
| Rieti to Obertraubling | 454.56 mi (731.55 km) |
| Rieti to Obertshausen | 563.04 mi (906.12 km) |
| Rieti to Oberursel | 576.03 mi (927.02 km) |
| Rieti to Ochsenfurt | 518.11 mi (833.81 km) |
| Rieti to Ochsenhausen | 416.31 mi (669.98 km) |
| Rieti to Ochtrup | 726.82 mi (1,169.70 km) |
| Rieti to Odenthal | 654.78 mi (1,053.77 km) |
| Rieti to Oelde | 687.66 mi (1,106.68 km) |
| Rieti to Oelsnitz | 554.56 mi (892.49 km) |
| Rieti to Oer-Erkenschwick | 690.22 mi (1,110.80 km) |
