| Howard to Cadiz | 4,148.03 mi (6,675.60 km) |
| Howard to Calafell | 4,301.92 mi (6,923.27 km) |
| Howard to Calahorra | 4,109.36 mi (6,613.37 km) |
| Howard to Calasparra | 4,283.70 mi (6,893.94 km) |
| Howard to Calatayud | 4,160.83 mi (6,696.21 km) |
| Howard to Caldas de Montbuy | 4,309.11 mi (6,934.84 km) |
| Howard to Caldas de Reyes | 3,812.51 mi (6,135.64 km) |
| Howard to Calella | 4,330.36 mi (6,969.04 km) |
| Howard to Callosa de Segura | 4,323.94 mi (6,958.71 km) |
| Howard to Calpe | 4,342.40 mi (6,988.41 km) |
| Howard to Calvia | 4,409.18 mi (7,095.89 km) |
| Howard to Camas | 4,125.26 mi (6,638.96 km) |
| Howard to Cambados | 3,809.19 mi (6,130.30 km) |
| Howard to Cambre | 3,801.28 mi (6,117.56 km) |
| Howard to Cambrils | 4,285.87 mi (6,897.44 km) |
