| Sondershausen to Oerlinghausen | 102.99 mi (165.74 km) |
| Sondershausen to Oestrich-Winkel | 157.04 mi (252.73 km) |
| Sondershausen to Offenburg | 239.08 mi (384.76 km) |
| Sondershausen to Oftersheim | 170.67 mi (274.67 km) |
| Sondershausen to Ohrdruf | 37.66 mi (60.62 km) |
| Sondershausen to Ohringen | 161.40 mi (259.75 km) |
| Sondershausen to Olbernhau | 117.61 mi (189.27 km) |
| Sondershausen to Olching | 219.72 mi (353.60 km) |
| Sondershausen to Oldenburg | 166.31 mi (267.65 km) |
| Sondershausen to Oldenburg in Holstein | 202.67 mi (326.17 km) |
| Sondershausen to Olfen | 151.61 mi (244.00 km) |
| Sondershausen to Olpe | 133.55 mi (214.93 km) |
| Sondershausen to Olsberg | 102.83 mi (165.50 km) |
| Sondershausen to Oranienburg | 139.02 mi (223.73 km) |
| Sondershausen to Ortenberg | 105.44 mi (169.69 km) |
