| Simpelveld to Navodari | 1,140.89 mi (1,836.08 km) |
| Simpelveld to Negresti-Oas | 809.14 mi (1,302.19 km) |
| Simpelveld to Nehoiu | 1,007.27 mi (1,621.05 km) |
| Simpelveld to Ocna Mures | 869.75 mi (1,399.73 km) |
| Simpelveld to Odobesti | 1,026.05 mi (1,651.26 km) |
| Simpelveld to Odorheiu Secuiesc | 933.46 mi (1,502.27 km) |
| Simpelveld to Oltenita | 1,066.66 mi (1,716.62 km) |
| Simpelveld to Onesti | 997.98 mi (1,606.09 km) |
| Simpelveld to Oradea | 766.55 mi (1,233.65 km) |
| Simpelveld to Orastie | 859.78 mi (1,383.68 km) |
| Simpelveld to Oravita | 827.38 mi (1,331.54 km) |
| Simpelveld to Orsova | 868.38 mi (1,397.52 km) |
| Simpelveld to Otelu Rosu | 836.42 mi (1,346.09 km) |
| Simpelveld to Otopeni | 1,025.79 mi (1,650.85 km) |
| Simpelveld to Ovidiu | 1,140.47 mi (1,835.41 km) |
