| Grumo Nevano to Navodari | 764.79 mi (1,230.81 km) |
| Grumo Nevano to Negresti-Oas | 657.90 mi (1,058.80 km) |
| Grumo Nevano to Nehoiu | 678.44 mi (1,091.84 km) |
| Grumo Nevano to Ocna Mures | 609.24 mi (980.48 km) |
| Grumo Nevano to Odobesti | 723.47 mi (1,164.30 km) |
| Grumo Nevano to Odorheiu Secuiesc | 664.49 mi (1,069.39 km) |
| Grumo Nevano to Oltenita | 665.85 mi (1,071.59 km) |
| Grumo Nevano to Onesti | 724.56 mi (1,166.06 km) |
| Grumo Nevano to Oradea | 569.21 mi (916.05 km) |
| Grumo Nevano to Orastie | 562.08 mi (904.58 km) |
| Grumo Nevano to Oravita | 469.90 mi (756.23 km) |
| Grumo Nevano to Orsova | 487.83 mi (785.09 km) |
| Grumo Nevano to Otelu Rosu | 515.41 mi (829.47 km) |
| Grumo Nevano to Otopeni | 648.20 mi (1,043.18 km) |
| Grumo Nevano to Ovidiu | 761.44 mi (1,225.42 km) |
