| Gourock to Noventa Vicentina | 1,023.30 mi (1,646.84 km) |
| Gourock to Novi di Modena | 1,026.13 mi (1,651.39 km) |
| Gourock to Novi Ligure | 975.03 mi (1,569.15 km) |
| Gourock to Nuoro | 1,256.70 mi (2,022.46 km) |
| Gourock to Occhiobello | 1,044.51 mi (1,680.97 km) |
| Gourock to Oderzo | 1,026.12 mi (1,651.38 km) |
| Gourock to Oggiono | 932.05 mi (1,499.99 km) |
| Gourock to Olbia | 1,223.52 mi (1,969.06 km) |
| Gourock to Oleggio | 922.49 mi (1,484.60 km) |
| Gourock to Olgiate Comasco | 921.28 mi (1,482.66 km) |
| Gourock to Olgiate Olona | 927.45 mi (1,492.59 km) |
| Gourock to Omegna | 900.47 mi (1,449.16 km) |
| Gourock to Opera | 950.85 mi (1,530.25 km) |
| Gourock to Oppeano | 1,011.95 mi (1,628.58 km) |
| Gourock to Orbassano | 928.19 mi (1,493.77 km) |
