| Idrija to Noventa Vicentina | 130.32 mi (209.73 km) |
| Idrija to Novi di Modena | 169.81 mi (273.28 km) |
| Idrija to Novi Ligure | 268.44 mi (432.02 km) |
| Idrija to Nuoro | 458.39 mi (737.71 km) |
| Idrija to Occhiobello | 140.10 mi (225.47 km) |
| Idrija to Oderzo | 75.38 mi (121.31 km) |
| Idrija to Oggiono | 225.41 mi (362.77 km) |
| Idrija to Olbia | 418.21 mi (673.04 km) |
| Idrija to Oleggio | 261.26 mi (420.46 km) |
| Idrija to Olgiate Comasco | 243.80 mi (392.36 km) |
| Idrija to Olgiate Olona | 248.98 mi (400.69 km) |
| Idrija to Omegna | 270.14 mi (434.75 km) |
| Idrija to Opera | 236.05 mi (379.88 km) |
| Idrija to Oppeano | 145.68 mi (234.45 km) |
| Idrija to Orbassano | 321.63 mi (517.62 km) |
