| Castelletto sopra Ticino to Novi di Modena | 124.01 mi (199.57 km) |
| Castelletto sopra Ticino to Novi Ligure | 66.57 mi (107.13 km) |
| Castelletto sopra Ticino to Nuoro | 374.77 mi (603.14 km) |
| Castelletto sopra Ticino to Occhiobello | 153.38 mi (246.84 km) |
| Castelletto sopra Ticino to Oderzo | 186.12 mi (299.52 km) |
| Castelletto sopra Ticino to Oggiono | 34.86 mi (56.10 km) |
| Castelletto sopra Ticino to Olbia | 334.49 mi (538.31 km) |
| Castelletto sopra Ticino to Oleggio | 8.06 mi (12.98 km) |
| Castelletto sopra Ticino to Olgiate Comasco | 16.72 mi (26.91 km) |
| Castelletto sopra Ticino to Olgiate Olona | 13.37 mi (21.52 km) |
| Castelletto sopra Ticino to Omegna | 15.60 mi (25.10 km) |
| Castelletto sopra Ticino to Opera | 36.43 mi (58.64 km) |
| Castelletto sopra Ticino to Oppeano | 126.78 mi (204.03 km) |
| Castelletto sopra Ticino to Orbassano | 72.36 mi (116.45 km) |
| Castelletto sopra Ticino to Orbetello | 260.09 mi (418.57 km) |
