| Harpenden to Brezovica | 778.99 mi (1,253.66 km) |
| Harpenden to Cankova | 815.38 mi (1,312.23 km) |
| Harpenden to Celje | 803.60 mi (1,293.27 km) |
| Harpenden to Cerklje na Gorenjskem | 772.40 mi (1,243.06 km) |
| Harpenden to Cerknica | 785.96 mi (1,264.89 km) |
| Harpenden to Cerkno | 758.12 mi (1,220.08 km) |
| Harpenden to Cerkvenjak | 817.97 mi (1,316.39 km) |
| Harpenden to Cirkulane | 828.32 mi (1,333.05 km) |
| Harpenden to Crensovci | 831.76 mi (1,338.60 km) |
| Harpenden to Crna na Koroskem | 778.01 mi (1,252.09 km) |
| Harpenden to Crnomelj | 827.33 mi (1,331.46 km) |
| Harpenden to Destrnik | 818.18 mi (1,316.73 km) |
| Harpenden to Divaca | 776.02 mi (1,248.88 km) |
| Harpenden to Dobje | 812.48 mi (1,307.55 km) |
| Harpenden to Dobrna | 798.12 mi (1,284.45 km) |
