| Hertford to Castelfidardo | 854.13 mi (1,374.59 km) |
| Hertford to Castelfiorentino | 762.86 mi (1,227.71 km) |
| Hertford to Castelfranco di Sopra | 780.18 mi (1,255.58 km) |
| Hertford to Castelfranco di Sotto | 750.74 mi (1,208.20 km) |
| Hertford to Castelfranco Emilia | 712.84 mi (1,147.20 km) |
| Hertford to Castelfranco Veneto | 690.63 mi (1,111.46 km) |
| Hertford to Castellabate | 1,069.59 mi (1,721.35 km) |
| Hertford to Castellammare del Golfo | 1,139.59 mi (1,833.99 km) |
| Hertford to Castellammare di Stabia | 1,031.71 mi (1,660.37 km) |
| Hertford to Castellamonte | 567.81 mi (913.81 km) |
| Hertford to Castellana Grotte | 1,110.71 mi (1,787.52 km) |
| Hertford to Castellaneta | 1,115.73 mi (1,795.59 km) |
| Hertford to Castellanza | 590.66 mi (950.58 km) |
| Hertford to Castellarano | 705.61 mi (1,135.57 km) |
| Hertford to Castelleone | 634.76 mi (1,021.55 km) |
