| Siran to Oberkirch | 1,624.64 mi (2,614.60 km) |
| Siran to Obernburg am Main | 1,595.20 mi (2,567.22 km) |
| Siran to Obernkirchen | 1,642.09 mi (2,642.70 km) |
| Siran to Oberschleissheim | 1,463.95 mi (2,356.01 km) |
| Siran to Oberstdorf | 1,512.29 mi (2,433.80 km) |
| Siran to Obertraubling | 1,448.66 mi (2,331.39 km) |
| Siran to Obertshausen | 1,612.12 mi (2,594.46 km) |
| Siran to Oberursel | 1,625.36 mi (2,615.76 km) |
| Siran to Ochsenfurt | 1,551.96 mi (2,497.64 km) |
| Siran to Ochsenhausen | 1,534.85 mi (2,470.10 km) |
| Siran to Ochtrup | 1,718.70 mi (2,765.97 km) |
| Siran to Odenthal | 1,700.98 mi (2,737.46 km) |
| Siran to Oelde | 1,672.31 mi (2,691.33 km) |
| Siran to Oelsnitz | 1,476.91 mi (2,376.86 km) |
| Siran to Oer-Erkenschwick | 1,705.76 mi (2,745.16 km) |
