| Sondershausen to Navodari | 952.50 mi (1,532.91 km) |
| Sondershausen to Negresti-Oas | 610.85 mi (983.07 km) |
| Sondershausen to Nehoiu | 819.19 mi (1,318.35 km) |
| Sondershausen to Ocna Mures | 681.83 mi (1,097.30 km) |
| Sondershausen to Odobesti | 833.17 mi (1,340.86 km) |
| Sondershausen to Odorheiu Secuiesc | 741.69 mi (1,193.64 km) |
| Sondershausen to Oltenita | 886.00 mi (1,425.88 km) |
| Sondershausen to Onesti | 802.80 mi (1,291.98 km) |
| Sondershausen to Oradea | 579.56 mi (932.71 km) |
| Sondershausen to Orastie | 678.88 mi (1,092.55 km) |
| Sondershausen to Oravita | 661.55 mi (1,064.67 km) |
| Sondershausen to Orsova | 701.54 mi (1,129.02 km) |
| Sondershausen to Otelu Rosu | 662.38 mi (1,066.00 km) |
| Sondershausen to Otopeni | 844.00 mi (1,358.29 km) |
| Sondershausen to Ovidiu | 952.53 mi (1,532.95 km) |
