| Opovo to Oberkirch | 630.74 mi (1,015.07 km) |
| Opovo to Obernburg am Main | 621.67 mi (1,000.47 km) |
| Opovo to Obernkirchen | 716.12 mi (1,152.48 km) |
| Opovo to Oberschleissheim | 474.52 mi (763.66 km) |
| Opovo to Oberstdorf | 511.35 mi (822.93 km) |
| Opovo to Obertraubling | 473.60 mi (762.18 km) |
| Opovo to Obertshausen | 641.12 mi (1,031.78 km) |
| Opovo to Oberursel | 655.59 mi (1,055.07 km) |
| Opovo to Ochsenfurt | 579.11 mi (931.98 km) |
| Opovo to Ochsenhausen | 539.36 mi (868.02 km) |
| Opovo to Ochtrup | 778.87 mi (1,253.47 km) |
| Opovo to Odenthal | 739.24 mi (1,189.69 km) |
| Opovo to Oelde | 730.68 mi (1,175.91 km) |
| Opovo to Oelsnitz | 533.12 mi (857.98 km) |
| Opovo to Oer-Erkenschwick | 755.50 mi (1,215.86 km) |
