| Harpenden to Celano | 936.34 mi (1,506.89 km) |
| Harpenden to Cento | 723.60 mi (1,164.51 km) |
| Harpenden to Cepagatti | 938.34 mi (1,510.11 km) |
| Harpenden to Ceprano | 963.98 mi (1,551.37 km) |
| Harpenden to Cercola | 1,027.83 mi (1,654.13 km) |
| Harpenden to Cerea | 698.18 mi (1,123.62 km) |
| Harpenden to Cerese | 689.77 mi (1,110.07 km) |
| Harpenden to Cerignola | 1,057.62 mi (1,702.07 km) |
| Harpenden to Cermenate | 601.89 mi (968.65 km) |
| Harpenden to Cernusco sul Naviglio | 619.39 mi (996.81 km) |
| Harpenden to Cerreto Guidi | 760.83 mi (1,224.44 km) |
| Harpenden to Cerro Maggiore | 602.78 mi (970.08 km) |
| Harpenden to Certaldo | 777.56 mi (1,251.36 km) |
| Harpenden to Cerveteri | 895.06 mi (1,440.46 km) |
| Harpenden to Cervia | 783.78 mi (1,261.37 km) |
