| Harrow Weald to Castelfidardo | 855.27 mi (1,376.42 km) |
| Harrow Weald to Castelfiorentino | 762.03 mi (1,226.37 km) |
| Harrow Weald to Castelfranco di Sopra | 779.89 mi (1,255.11 km) |
| Harrow Weald to Castelfranco di Sotto | 749.81 mi (1,206.70 km) |
| Harrow Weald to Castelfranco Emilia | 713.15 mi (1,147.70 km) |
| Harrow Weald to Castelfranco Veneto | 692.99 mi (1,115.27 km) |
| Harrow Weald to Castellabate | 1,069.13 mi (1,720.61 km) |
| Harrow Weald to Castellammare del Golfo | 1,136.29 mi (1,828.69 km) |
| Harrow Weald to Castellammare di Stabia | 1,031.21 mi (1,659.57 km) |
| Harrow Weald to Castellamonte | 565.64 mi (910.31 km) |
| Harrow Weald to Castellana Grotte | 1,112.13 mi (1,789.80 km) |
| Harrow Weald to Castellaneta | 1,116.82 mi (1,797.35 km) |
| Harrow Weald to Castellanza | 590.14 mi (949.74 km) |
| Harrow Weald to Castellarano | 705.64 mi (1,135.63 km) |
| Harrow Weald to Castelleone | 634.71 mi (1,021.46 km) |
