| Boone to Cadiz | 4,074.65 mi (6,557.52 km) |
| Boone to Calafell | 4,323.32 mi (6,957.70 km) |
| Boone to Calahorra | 4,125.95 mi (6,640.08 km) |
| Boone to Calasparra | 4,254.46 mi (6,846.90 km) |
| Boone to Calatayud | 4,167.88 mi (6,707.55 km) |
| Boone to Caldas de Montbuy | 4,338.41 mi (6,981.99 km) |
| Boone to Caldas de Reyes | 3,801.72 mi (6,118.28 km) |
| Boone to Calella | 4,362.00 mi (7,019.96 km) |
| Boone to Callosa de Segura | 4,297.87 mi (6,916.76 km) |
| Boone to Calpe | 4,327.13 mi (6,963.85 km) |
| Boone to Calvia | 4,417.24 mi (7,108.85 km) |
| Boone to Camas | 4,063.44 mi (6,539.47 km) |
| Boone to Cambados | 3,796.36 mi (6,109.65 km) |
| Boone to Cambre | 3,800.60 mi (6,116.47 km) |
| Boone to Cambrils | 4,303.15 mi (6,925.26 km) |
