| Negresti-Oas to Nasaud | 61.13 mi (98.38 km) |
| Negresti-Oas to Navodari | 349.02 mi (561.69 km) |
| Negresti-Oas to Nehoiu | 221.15 mi (355.91 km) |
| Negresti-Oas to Ocna Mures | 104.25 mi (167.77 km) |
| Negresti-Oas to Odobesti | 225.27 mi (362.54 km) |
| Negresti-Oas to Odorheiu Secuiesc | 139.10 mi (223.86 km) |
| Negresti-Oas to Oltenita | 303.42 mi (488.30 km) |
| Negresti-Oas to Onesti | 192.77 mi (310.23 km) |
| Negresti-Oas to Oradea | 89.23 mi (143.60 km) |
| Negresti-Oas to Orastie | 139.93 mi (225.19 km) |
| Negresti-Oas to Oravita | 212.26 mi (341.60 km) |
| Negresti-Oas to Orsova | 222.71 mi (358.41 km) |
| Negresti-Oas to Otelu Rosu | 170.17 mi (273.86 km) |
| Negresti-Oas to Otopeni | 261.89 mi (421.46 km) |
| Negresti-Oas to Ovidiu | 349.79 mi (562.93 km) |
