| Sondershausen to Oria | 817.35 mi (1,315.39 km) |
| Sondershausen to Oristano | 799.36 mi (1,286.44 km) |
| Sondershausen to Orta Nova | 730.48 mi (1,175.60 km) |
| Sondershausen to Orte | 619.50 mi (996.99 km) |
| Sondershausen to Ortona | 644.77 mi (1,037.66 km) |
| Sondershausen to Orvieto | 600.38 mi (966.23 km) |
| Sondershausen to Orzinuovi | 414.47 mi (667.02 km) |
| Sondershausen to Osimo | 558.16 mi (898.27 km) |
| Sondershausen to Ospitaletto | 403.16 mi (648.83 km) |
| Sondershausen to Ostuni | 801.37 mi (1,289.68 km) |
| Sondershausen to Ottaviano | 746.69 mi (1,201.69 km) |
| Sondershausen to Ovada | 475.96 mi (765.99 km) |
| Sondershausen to Ozieri | 750.24 mi (1,207.39 km) |
| Sondershausen to Paceco | 928.33 mi (1,494.00 km) |
| Sondershausen to Pachino | 1,033.37 mi (1,663.05 km) |
