| Welwyn Garden City to Castelfidardo | 858.48 mi (1,381.60 km) |
| Welwyn Garden City to Castelfiorentino | 766.91 mi (1,234.23 km) |
| Welwyn Garden City to Castelfranco di Sopra | 784.32 mi (1,262.24 km) |
| Welwyn Garden City to Castelfranco di Sotto | 754.77 mi (1,214.69 km) |
| Welwyn Garden City to Castelfranco Emilia | 717.07 mi (1,154.01 km) |
| Welwyn Garden City to Castelfranco Veneto | 695.14 mi (1,118.72 km) |
| Welwyn Garden City to Castellabate | 1,073.71 mi (1,727.97 km) |
| Welwyn Garden City to Castellammare del Golfo | 1,143.19 mi (1,839.79 km) |
| Welwyn Garden City to Castellammare di Stabia | 1,035.82 mi (1,666.99 km) |
| Welwyn Garden City to Castellamonte | 571.61 mi (919.92 km) |
| Welwyn Garden City to Castellana Grotte | 1,115.11 mi (1,794.60 km) |
| Welwyn Garden City to Castellaneta | 1,120.08 mi (1,802.60 km) |
| Welwyn Garden City to Castellanza | 594.76 mi (957.17 km) |
| Welwyn Garden City to Castellarano | 709.80 mi (1,142.31 km) |
| Welwyn Garden City to Castelleone | 638.93 mi (1,028.26 km) |
