| Maastricht to Navodari | 1,153.86 mi (1,856.95 km) |
| Maastricht to Negresti-Oas | 822.27 mi (1,323.31 km) |
| Maastricht to Nehoiu | 1,020.25 mi (1,641.94 km) |
| Maastricht to Ocna Mures | 882.75 mi (1,420.65 km) |
| Maastricht to Odobesti | 1,039.10 mi (1,672.27 km) |
| Maastricht to Odorheiu Secuiesc | 946.51 mi (1,523.26 km) |
| Maastricht to Oltenita | 1,079.48 mi (1,737.25 km) |
| Maastricht to Onesti | 1,011.06 mi (1,627.15 km) |
| Maastricht to Oradea | 779.55 mi (1,254.57 km) |
| Maastricht to Orastie | 872.64 mi (1,404.39 km) |
| Maastricht to Oravita | 839.91 mi (1,351.70 km) |
| Maastricht to Orsova | 880.91 mi (1,417.70 km) |
| Maastricht to Otelu Rosu | 849.15 mi (1,366.57 km) |
| Maastricht to Otopeni | 1,038.64 mi (1,671.54 km) |
| Maastricht to Ovidiu | 1,153.43 mi (1,856.27 km) |
