| Onex to Castelfidardo | 410.20 mi (660.15 km) |
| Onex to Castelfiorentino | 297.58 mi (478.90 km) |
| Onex to Castelfranco di Sopra | 320.25 mi (515.39 km) |
| Onex to Castelfranco di Sotto | 284.80 mi (458.34 km) |
| Onex to Castelfranco Emilia | 264.08 mi (425.00 km) |
| Onex to Castelfranco Veneto | 282.55 mi (454.72 km) |
| Onex to Castellabate | 603.50 mi (971.24 km) |
| Onex to Castellammare del Golfo | 661.57 mi (1,064.70 km) |
| Onex to Castellammare di Stabia | 565.62 mi (910.28 km) |
| Onex to Castellamonte | 95.39 mi (153.51 km) |
| Onex to Castellana Grotte | 663.42 mi (1,067.67 km) |
| Onex to Castellaneta | 664.43 mi (1,069.30 km) |
| Onex to Castellanza | 140.20 mi (225.63 km) |
| Onex to Castellarano | 253.21 mi (407.50 km) |
| Onex to Castelleone | 186.86 mi (300.72 km) |
