| Hwlffordd to Nasaud | 1,343.65 mi (2,162.39 km) |
| Hwlffordd to Navodari | 1,617.89 mi (2,603.75 km) |
| Hwlffordd to Negresti-Oas | 1,285.48 mi (2,068.78 km) |
| Hwlffordd to Nehoiu | 1,484.34 mi (2,388.81 km) |
| Hwlffordd to Ocna Mures | 1,346.90 mi (2,167.62 km) |
| Hwlffordd to Odobesti | 1,503.27 mi (2,419.27 km) |
| Hwlffordd to Odorheiu Secuiesc | 1,410.70 mi (2,270.30 km) |
| Hwlffordd to Oltenita | 1,542.31 mi (2,482.11 km) |
| Hwlffordd to Onesti | 1,475.03 mi (2,373.83 km) |
| Hwlffordd to Oradea | 1,243.71 mi (2,001.56 km) |
| Hwlffordd to Orastie | 1,336.01 mi (2,150.10 km) |
| Hwlffordd to Oravita | 1,299.46 mi (2,091.28 km) |
| Hwlffordd to Orsova | 1,340.50 mi (2,157.33 km) |
| Hwlffordd to Otelu Rosu | 1,311.12 mi (2,110.04 km) |
| Hwlffordd to Otopeni | 1,501.81 mi (2,416.94 km) |
