| Harrow to Cadiz | 1,080.02 mi (1,738.13 km) |
| Harrow to Calafell | 723.13 mi (1,163.76 km) |
| Harrow to Calahorra | 645.93 mi (1,039.52 km) |
| Harrow to Calasparra | 924.93 mi (1,488.54 km) |
| Harrow to Calatayud | 709.69 mi (1,142.14 km) |
| Harrow to Caldas de Montbuy | 697.70 mi (1,122.84 km) |
| Harrow to Caldas de Reyes | 731.87 mi (1,177.83 km) |
| Harrow to Calella | 703.15 mi (1,131.60 km) |
| Harrow to Callosa de Segura | 930.43 mi (1,497.39 km) |
| Harrow to Calpe | 894.17 mi (1,439.03 km) |
| Harrow to Calvia | 841.57 mi (1,354.37 km) |
| Harrow to Camas | 1,018.37 mi (1,638.90 km) |
| Harrow to Cambados | 742.09 mi (1,194.28 km) |
| Harrow to Cambre | 683.39 mi (1,099.81 km) |
| Harrow to Cambrils | 729.67 mi (1,174.28 km) |
