| Constanta to Noventa Vicentina | 841.39 mi (1,354.08 km) |
| Constanta to Novi di Modena | 873.11 mi (1,405.14 km) |
| Constanta to Novi Ligure | 977.16 mi (1,572.59 km) |
| Constanta to Nuoro | 1,019.75 mi (1,641.13 km) |
| Constanta to Occhiobello | 839.77 mi (1,351.48 km) |
| Constanta to Oderzo | 795.37 mi (1,280.03 km) |
| Constanta to Oggiono | 946.78 mi (1,523.69 km) |
| Constanta to Olbia | 997.09 mi (1,604.66 km) |
| Constanta to Oleggio | 981.53 mi (1,579.62 km) |
| Constanta to Olgiate Comasco | 965.24 mi (1,553.41 km) |
| Constanta to Olgiate Olona | 969.40 mi (1,560.11 km) |
| Constanta to Omegna | 992.15 mi (1,596.70 km) |
| Constanta to Opera | 953.71 mi (1,534.85 km) |
| Constanta to Oppeano | 858.38 mi (1,381.43 km) |
| Constanta to Orbassano | 1,036.78 mi (1,668.54 km) |
