| Grevenmacher to Navodari | 1,103.52 mi (1,775.95 km) |
| Grevenmacher to Negresti-Oas | 781.60 mi (1,257.86 km) |
| Grevenmacher to Nehoiu | 970.55 mi (1,561.96 km) |
| Grevenmacher to Ocna Mures | 834.08 mi (1,342.33 km) |
| Grevenmacher to Odobesti | 992.48 mi (1,597.24 km) |
| Grevenmacher to Odorheiu Secuiesc | 899.80 mi (1,448.10 km) |
| Grevenmacher to Oltenita | 1,025.03 mi (1,649.62 km) |
| Grevenmacher to Onesti | 966.32 mi (1,555.15 km) |
| Grevenmacher to Oradea | 731.46 mi (1,177.17 km) |
| Grevenmacher to Orastie | 819.98 mi (1,319.64 km) |
| Grevenmacher to Oravita | 780.32 mi (1,255.81 km) |
| Grevenmacher to Orsova | 821.34 mi (1,321.82 km) |
| Grevenmacher to Otelu Rosu | 793.21 mi (1,276.55 km) |
| Grevenmacher to Otopeni | 985.09 mi (1,585.35 km) |
| Grevenmacher to Ovidiu | 1,102.82 mi (1,774.81 km) |
