| Formello to Oberkirch | 492.35 mi (792.36 km) |
| Formello to Obernburg am Main | 558.18 mi (898.30 km) |
| Formello to Obernkirchen | 720.08 mi (1,158.85 km) |
| Formello to Oberschleissheim | 428.00 mi (688.80 km) |
| Formello to Oberstdorf | 382.41 mi (615.43 km) |
| Formello to Obertraubling | 475.67 mi (765.51 km) |
| Formello to Obertshausen | 577.31 mi (929.08 km) |
| Formello to Oberursel | 589.93 mi (949.40 km) |
| Formello to Ochsenfurt | 534.65 mi (860.44 km) |
| Formello to Ochsenhausen | 430.68 mi (693.11 km) |
| Formello to Ochtrup | 740.51 mi (1,191.73 km) |
| Formello to Odenthal | 666.95 mi (1,073.35 km) |
| Formello to Oelde | 702.53 mi (1,130.61 km) |
| Formello to Oelsnitz | 575.89 mi (926.80 km) |
| Formello to Oer-Erkenschwick | 703.38 mi (1,131.99 km) |
