| Onex to Castelletto sopra Ticino | 125.89 mi (202.60 km) |
| Onex to Castelli Calepio | 186.58 mi (300.27 km) |
| Onex to Castelnovo ne' Monti | 241.36 mi (388.43 km) |
| Onex to Castelnuovo Berardenga | 329.54 mi (530.35 km) |
| Onex to Castelnuovo di Porto | 422.77 mi (680.38 km) |
| Onex to Castelnuovo di Verona | 230.62 mi (371.14 km) |
| Onex to Castelnuovo Rangone | 260.29 mi (418.90 km) |
| Onex to Castelvetrano | 680.05 mi (1,094.43 km) |
| Onex to Castelvetro di Modena | 262.62 mi (422.65 km) |
| Onex to Castenaso | 285.20 mi (458.99 km) |
| Onex to Castenedolo | 207.94 mi (334.65 km) |
| Onex to Castiglion Fiorentino | 346.23 mi (557.20 km) |
| Onex to Castiglione del Lago | 359.97 mi (579.32 km) |
| Onex to Castiglione delle Stiviere | 218.74 mi (352.04 km) |
| Onex to Castrolibero | 697.32 mi (1,122.22 km) |
