| Alton to Castelfidardo | 860.50 mi (1,384.83 km) |
| Alton to Castelfiorentino | 762.72 mi (1,227.48 km) |
| Alton to Castelfranco di Sopra | 781.84 mi (1,258.25 km) |
| Alton to Castelfranco di Sotto | 750.30 mi (1,207.49 km) |
| Alton to Castelfranco Emilia | 716.68 mi (1,153.39 km) |
| Alton to Castelfranco Veneto | 701.45 mi (1,128.87 km) |
| Alton to Castellabate | 1,070.25 mi (1,722.40 km) |
| Alton to Castellammare del Golfo | 1,130.50 mi (1,819.36 km) |
| Alton to Castellammare di Stabia | 1,032.28 mi (1,661.29 km) |
| Alton to Castellamonte | 563.66 mi (907.12 km) |
| Alton to Castellana Grotte | 1,117.67 mi (1,798.72 km) |
| Alton to Castellaneta | 1,121.59 mi (1,805.02 km) |
| Alton to Castellanza | 592.05 mi (952.81 km) |
| Alton to Castellarano | 708.54 mi (1,140.28 km) |
| Alton to Castelleone | 637.58 mi (1,026.09 km) |
