| Harwich to Cadiz | 1,126.44 mi (1,812.83 km) |
| Harwich to Calafell | 741.76 mi (1,193.74 km) |
| Harwich to Calahorra | 682.60 mi (1,098.53 km) |
| Harwich to Calasparra | 957.60 mi (1,541.10 km) |
| Harwich to Calatayud | 743.94 mi (1,197.26 km) |
| Harwich to Caldas de Montbuy | 713.01 mi (1,147.47 km) |
| Harwich to Caldas de Reyes | 793.00 mi (1,276.21 km) |
| Harwich to Calella | 715.87 mi (1,152.08 km) |
| Harwich to Callosa de Segura | 959.91 mi (1,544.82 km) |
| Harwich to Calpe | 920.06 mi (1,480.70 km) |
| Harwich to Calvia | 856.63 mi (1,378.61 km) |
| Harwich to Camas | 1,064.89 mi (1,713.77 km) |
| Harwich to Cambados | 803.40 mi (1,292.95 km) |
| Harwich to Cambre | 745.12 mi (1,199.16 km) |
| Harwich to Cambrils | 750.90 mi (1,208.46 km) |
