| Grinon to Noventa Vicentina | 853.59 mi (1,373.72 km) |
| Grinon to Novi di Modena | 815.80 mi (1,312.91 km) |
| Grinon to Novi Ligure | 715.15 mi (1,150.93 km) |
| Grinon to Nuoro | 694.43 mi (1,117.58 km) |
| Grinon to Occhiobello | 848.11 mi (1,364.91 km) |
| Grinon to Oderzo | 908.69 mi (1,462.40 km) |
| Grinon to Oggiono | 768.54 mi (1,236.85 km) |
| Grinon to Olbia | 701.68 mi (1,129.24 km) |
| Grinon to Oleggio | 731.89 mi (1,177.86 km) |
| Grinon to Olgiate Comasco | 751.91 mi (1,210.09 km) |
| Grinon to Olgiate Olona | 743.76 mi (1,196.96 km) |
| Grinon to Omegna | 730.90 mi (1,176.27 km) |
| Grinon to Opera | 751.20 mi (1,208.94 km) |
| Grinon to Oppeano | 837.90 mi (1,348.47 km) |
| Grinon to Orbassano | 666.05 mi (1,071.91 km) |
