| Ales to Navodari | 1,210.15 mi (1,947.56 km) |
| Ales to Negresti-Oas | 960.83 mi (1,546.30 km) |
| Ales to Nehoiu | 1,090.45 mi (1,754.91 km) |
| Ales to Ocna Mures | 971.89 mi (1,564.10 km) |
| Ales to Odobesti | 1,125.76 mi (1,811.74 km) |
| Ales to Odorheiu Secuiesc | 1,040.50 mi (1,674.52 km) |
| Ales to Oltenita | 1,115.47 mi (1,795.17 km) |
| Ales to Onesti | 1,110.57 mi (1,787.28 km) |
| Ales to Oradea | 883.94 mi (1,422.56 km) |
| Ales to Orastie | 939.47 mi (1,511.94 km) |
| Ales to Oravita | 866.84 mi (1,395.04 km) |
| Ales to Orsova | 902.72 mi (1,452.78 km) |
| Ales to Otelu Rosu | 898.58 mi (1,446.12 km) |
| Ales to Otopeni | 1,083.69 mi (1,744.03 km) |
| Ales to Ovidiu | 1,208.04 mi (1,944.15 km) |
