| Letchworth to Castelfidardo | 866.89 mi (1,395.12 km) |
| Letchworth to Castelfiorentino | 776.23 mi (1,249.22 km) |
| Letchworth to Castelfranco di Sopra | 793.39 mi (1,276.84 km) |
| Letchworth to Castelfranco di Sotto | 764.13 mi (1,229.75 km) |
| Letchworth to Castelfranco Emilia | 725.88 mi (1,168.19 km) |
| Letchworth to Castelfranco Veneto | 702.95 mi (1,131.29 km) |
| Letchworth to Castellabate | 1,082.84 mi (1,742.66 km) |
| Letchworth to Castellammare del Golfo | 1,153.45 mi (1,856.30 km) |
| Letchworth to Castellammare di Stabia | 1,044.96 mi (1,681.70 km) |
| Letchworth to Castellamonte | 581.50 mi (935.84 km) |
| Letchworth to Castellana Grotte | 1,123.35 mi (1,807.86 km) |
| Letchworth to Castellaneta | 1,128.48 mi (1,816.12 km) |
| Letchworth to Castellanza | 603.96 mi (971.99 km) |
| Letchworth to Castellarano | 718.74 mi (1,156.70 km) |
| Letchworth to Castelleone | 647.93 mi (1,042.74 km) |
