| Clay to Nasaud | 5,400.28 mi (8,690.92 km) |
| Clay to Navodari | 5,686.50 mi (9,151.53 km) |
| Clay to Negresti-Oas | 5,339.33 mi (8,592.82 km) |
| Clay to Nehoiu | 5,553.97 mi (8,938.25 km) |
| Clay to Ocna Mures | 5,417.22 mi (8,718.18 km) |
| Clay to Odobesti | 5,564.46 mi (8,955.13 km) |
| Clay to Odorheiu Secuiesc | 5,474.81 mi (8,810.85 km) |
| Clay to Oltenita | 5,621.87 mi (9,047.52 km) |
| Clay to Onesti | 5,531.89 mi (8,902.71 km) |
| Clay to Oradea | 5,315.41 mi (8,554.32 km) |
| Clay to Orastie | 5,414.53 mi (8,713.84 km) |
| Clay to Oravita | 5,388.84 mi (8,672.50 km) |
| Clay to Orsova | 5,429.77 mi (8,738.37 km) |
| Clay to Otelu Rosu | 5,395.43 mi (8,683.11 km) |
| Clay to Otopeni | 5,579.93 mi (8,980.03 km) |
