| Roermond to Navodari | 1,147.44 mi (1,846.63 km) |
| Roermond to Negresti-Oas | 812.99 mi (1,308.38 km) |
| Roermond to Nehoiu | 1,013.76 mi (1,631.49 km) |
| Roermond to Ocna Mures | 876.10 mi (1,409.95 km) |
| Roermond to Odobesti | 1,031.49 mi (1,660.02 km) |
| Roermond to Odorheiu Secuiesc | 939.06 mi (1,511.27 km) |
| Roermond to Oltenita | 1,074.69 mi (1,729.55 km) |
| Roermond to Onesti | 1,002.84 mi (1,613.91 km) |
| Roermond to Oradea | 772.90 mi (1,243.87 km) |
| Roermond to Orastie | 867.48 mi (1,396.07 km) |
| Roermond to Oravita | 837.53 mi (1,347.87 km) |
| Roermond to Orsova | 878.46 mi (1,413.74 km) |
| Roermond to Otelu Rosu | 845.28 mi (1,360.35 km) |
| Roermond to Otopeni | 1,033.57 mi (1,663.37 km) |
| Roermond to Ovidiu | 1,147.12 mi (1,846.12 km) |
