| Olbia to Castelletto sopra Ticino | 334.49 mi (538.31 km) |
| Olbia to Castelli Calepio | 326.50 mi (525.46 km) |
| Olbia to Castelnovo ne' Monti | 247.23 mi (397.88 km) |
| Olbia to Castelnuovo Berardenga | 196.84 mi (316.79 km) |
| Olbia to Castelnuovo di Porto | 176.47 mi (284.00 km) |
| Olbia to Castelnuovo di Verona | 318.51 mi (512.60 km) |
| Olbia to Castelnuovo Rangone | 261.35 mi (420.60 km) |
| Olbia to Castelvetrano | 284.40 mi (457.70 km) |
| Olbia to Castelvetro di Modena | 258.28 mi (415.67 km) |
| Olbia to Castenaso | 267.63 mi (430.71 km) |
| Olbia to Castenedolo | 317.17 mi (510.44 km) |
| Olbia to Castiglion Fiorentino | 208.51 mi (335.57 km) |
| Olbia to Castiglione del Lago | 201.64 mi (324.51 km) |
| Olbia to Castiglione delle Stiviere | 313.83 mi (505.06 km) |
| Olbia to Castrolibero | 370.76 mi (596.68 km) |
