| Slovenj Gradec to Nasaud | 443.34 mi (713.49 km) |
| Slovenj Gradec to Navodari | 672.69 mi (1,082.59 km) |
| Slovenj Gradec to Negresti-Oas | 402.72 mi (648.12 km) |
| Slovenj Gradec to Nehoiu | 544.87 mi (876.88 km) |
| Slovenj Gradec to Ocna Mures | 417.87 mi (672.50 km) |
| Slovenj Gradec to Odobesti | 575.65 mi (926.41 km) |
| Slovenj Gradec to Odorheiu Secuiesc | 486.83 mi (783.47 km) |
| Slovenj Gradec to Oltenita | 585.50 mi (942.27 km) |
| Slovenj Gradec to Onesti | 556.93 mi (896.29 km) |
| Slovenj Gradec to Oradea | 325.88 mi (524.46 km) |
| Slovenj Gradec to Orastie | 390.99 mi (629.23 km) |
| Slovenj Gradec to Oravita | 334.03 mi (537.56 km) |
| Slovenj Gradec to Orsova | 374.30 mi (602.38 km) |
| Slovenj Gradec to Otelu Rosu | 355.53 mi (572.17 km) |
| Slovenj Gradec to Otopeni | 548.43 mi (882.62 km) |
