| Siran to Oerlinghausen | 1,653.92 mi (2,661.72 km) |
| Siran to Oestrich-Winkel | 1,647.16 mi (2,650.85 km) |
| Siran to Offenburg | 1,630.70 mi (2,624.36 km) |
| Siran to Oftersheim | 1,612.61 mi (2,595.24 km) |
| Siran to Ohrdruf | 1,545.44 mi (2,487.14 km) |
| Siran to Ohringen | 1,569.82 mi (2,526.37 km) |
| Siran to Olbernhau | 1,434.23 mi (2,308.17 km) |
| Siran to Olching | 1,474.51 mi (2,372.99 km) |
| Siran to Oldenburg | 1,697.56 mi (2,731.95 km) |
| Siran to Oldenburg in Holstein | 1,626.72 mi (2,617.95 km) |
| Siran to Olfen | 1,701.63 mi (2,738.51 km) |
| Siran to Olpe | 1,670.48 mi (2,688.38 km) |
| Siran to Olsberg | 1,649.29 mi (2,654.27 km) |
| Siran to Oranienburg | 1,493.81 mi (2,404.06 km) |
| Siran to Ortenberg | 1,607.36 mi (2,586.80 km) |
