| Helston to Noventa Vicentina | 847.01 mi (1,363.13 km) |
| Helston to Novi di Modena | 833.92 mi (1,342.06 km) |
| Helston to Novi Ligure | 751.79 mi (1,209.89 km) |
| Helston to Nuoro | 977.70 mi (1,573.46 km) |
| Helston to Occhiobello | 861.47 mi (1,386.41 km) |
| Helston to Oderzo | 872.08 mi (1,403.48 km) |
| Helston to Oggiono | 737.88 mi (1,187.51 km) |
| Helston to Olbia | 952.96 mi (1,533.64 km) |
| Helston to Oleggio | 714.23 mi (1,149.45 km) |
| Helston to Olgiate Comasco | 721.78 mi (1,161.59 km) |
| Helston to Olgiate Olona | 723.46 mi (1,164.30 km) |
| Helston to Omegna | 695.12 mi (1,118.68 km) |
| Helston to Opera | 746.17 mi (1,200.84 km) |
| Helston to Oppeano | 831.60 mi (1,338.34 km) |
| Helston to Orbassano | 691.79 mi (1,113.33 km) |
