| Olbia to Castelfidardo | 271.76 mi (437.35 km) |
| Olbia to Castelfiorentino | 199.99 mi (321.85 km) |
| Olbia to Castelfranco di Sopra | 214.58 mi (345.34 km) |
| Olbia to Castelfranco di Sotto | 202.63 mi (326.10 km) |
| Olbia to Castelfranco Emilia | 266.17 mi (428.36 km) |
| Olbia to Castelfranco Veneto | 350.22 mi (563.62 km) |
| Olbia to Castellabate | 289.39 mi (465.73 km) |
| Olbia to Castellammare del Golfo | 269.01 mi (432.93 km) |
| Olbia to Castellammare di Stabia | 260.88 mi (419.84 km) |
| Olbia to Castellamonte | 321.39 mi (517.23 km) |
| Olbia to Castellana Grotte | 400.27 mi (644.17 km) |
| Olbia to Castellaneta | 389.31 mi (626.53 km) |
| Olbia to Castellanza | 326.14 mi (524.86 km) |
| Olbia to Castellarano | 260.45 mi (419.16 km) |
| Olbia to Castelleone | 302.85 mi (487.39 km) |
