| Conwy to Nasaud | 1,303.71 mi (2,098.12 km) |
| Conwy to Navodari | 1,583.75 mi (2,548.80 km) |
| Conwy to Negresti-Oas | 1,244.18 mi (2,002.32 km) |
| Conwy to Nehoiu | 1,450.12 mi (2,333.73 km) |
| Conwy to Ocna Mures | 1,312.42 mi (2,112.13 km) |
| Conwy to Odobesti | 1,465.83 mi (2,359.03 km) |
| Conwy to Odorheiu Secuiesc | 1,373.91 mi (2,211.10 km) |
| Conwy to Oltenita | 1,512.94 mi (2,434.84 km) |
| Conwy to Onesti | 1,435.92 mi (2,310.89 km) |
| Conwy to Oradea | 1,209.42 mi (1,946.37 km) |
| Conwy to Orastie | 1,305.53 mi (2,101.05 km) |
| Conwy to Oravita | 1,276.37 mi (2,054.12 km) |
| Conwy to Orsova | 1,317.32 mi (2,120.03 km) |
| Conwy to Otelu Rosu | 1,284.10 mi (2,066.55 km) |
| Conwy to Otopeni | 1,471.59 mi (2,368.29 km) |
