| Knjazevac to Nasaud | 278.36 mi (447.98 km) |
| Knjazevac to Navodari | 312.73 mi (503.28 km) |
| Knjazevac to Negresti-Oas | 305.65 mi (491.90 km) |
| Knjazevac to Nehoiu | 229.94 mi (370.05 km) |
| Knjazevac to Ocna Mures | 211.51 mi (340.39 km) |
| Knjazevac to Odobesti | 276.38 mi (444.79 km) |
| Knjazevac to Odorheiu Secuiesc | 239.76 mi (385.86 km) |
| Knjazevac to Oltenita | 213.50 mi (343.59 km) |
| Knjazevac to Onesti | 285.21 mi (459.01 km) |
| Knjazevac to Oradea | 248.07 mi (399.22 km) |
| Knjazevac to Orastie | 166.68 mi (268.24 km) |
| Knjazevac to Oravita | 112.67 mi (181.33 km) |
| Knjazevac to Orsova | 84.68 mi (136.28 km) |
| Knjazevac to Otelu Rosu | 139.53 mi (224.55 km) |
| Knjazevac to Otopeni | 194.67 mi (313.29 km) |
