| Royston to Castelfidardo | 862.74 mi (1,388.45 km) |
| Royston to Castelfiorentino | 773.16 mi (1,244.29 km) |
| Royston to Castelfranco di Sopra | 790.03 mi (1,271.43 km) |
| Royston to Castelfranco di Sotto | 761.12 mi (1,224.91 km) |
| Royston to Castelfranco Emilia | 722.22 mi (1,162.30 km) |
| Royston to Castelfranco Veneto | 698.22 mi (1,123.68 km) |
| Royston to Castellabate | 1,079.51 mi (1,737.30 km) |
| Royston to Castellammare del Golfo | 1,151.69 mi (1,853.47 km) |
| Royston to Castellammare di Stabia | 1,041.66 mi (1,676.38 km) |
| Royston to Castellamonte | 579.26 mi (932.23 km) |
| Royston to Castellana Grotte | 1,119.02 mi (1,800.88 km) |
| Royston to Castellaneta | 1,124.32 mi (1,809.41 km) |
| Royston to Castellanza | 600.80 mi (966.89 km) |
| Royston to Castellarano | 715.23 mi (1,151.05 km) |
| Royston to Castelleone | 644.49 mi (1,037.21 km) |
