| Niel to Navodari | 1,215.27 mi (1,955.78 km) |
| Niel to Negresti-Oas | 882.88 mi (1,420.85 km) |
| Niel to Nehoiu | 1,081.64 mi (1,740.74 km) |
| Niel to Ocna Mures | 944.11 mi (1,519.40 km) |
| Niel to Odobesti | 1,100.27 mi (1,770.71 km) |
| Niel to Odorheiu Secuiesc | 1,007.71 mi (1,621.75 km) |
| Niel to Oltenita | 1,141.02 mi (1,836.29 km) |
| Niel to Onesti | 1,072.06 mi (1,725.31 km) |
| Niel to Oradea | 840.90 mi (1,353.30 km) |
| Niel to Orastie | 934.17 mi (1,503.40 km) |
| Niel to Oravita | 901.28 mi (1,450.48 km) |
| Niel to Orsova | 942.30 mi (1,516.48 km) |
| Niel to Otelu Rosu | 910.68 mi (1,465.59 km) |
| Niel to Otopeni | 1,100.18 mi (1,770.57 km) |
| Niel to Ovidiu | 1,214.86 mi (1,955.12 km) |
