| Trecastagni to Noventa Vicentina | 560.55 mi (902.12 km) |
| Trecastagni to Novi di Modena | 547.50 mi (881.11 km) |
| Trecastagni to Novi Ligure | 591.83 mi (952.46 km) |
| Trecastagni to Nuoro | 360.74 mi (580.56 km) |
| Trecastagni to Occhiobello | 536.34 mi (863.16 km) |
| Trecastagni to Oderzo | 579.61 mi (932.79 km) |
| Trecastagni to Oggiono | 636.66 mi (1,024.60 km) |
| Trecastagni to Olbia | 375.61 mi (604.49 km) |
| Trecastagni to Oleggio | 643.92 mi (1,036.28 km) |
| Trecastagni to Olgiate Comasco | 646.02 mi (1,039.67 km) |
| Trecastagni to Olgiate Olona | 639.32 mi (1,028.88 km) |
| Trecastagni to Omegna | 665.97 mi (1,071.77 km) |
| Trecastagni to Opera | 616.13 mi (991.56 km) |
| Trecastagni to Oppeano | 567.79 mi (913.77 km) |
| Trecastagni to Orbassano | 642.91 mi (1,034.66 km) |
