| Duncan to Cadiz | 4,934.00 mi (7,940.51 km) |
| Duncan to Calafell | 5,130.84 mi (8,257.28 km) |
| Duncan to Calahorra | 4,935.65 mi (7,943.16 km) |
| Duncan to Calasparra | 5,091.84 mi (8,194.53 km) |
| Duncan to Calatayud | 4,983.70 mi (8,020.48 km) |
| Duncan to Caldas de Montbuy | 5,140.90 mi (8,273.47 km) |
| Duncan to Caldas de Reyes | 4,626.42 mi (7,445.50 km) |
| Duncan to Calella | 5,163.06 mi (8,309.14 km) |
| Duncan to Callosa de Segura | 5,133.69 mi (8,261.87 km) |
| Duncan to Calpe | 5,156.94 mi (8,299.30 km) |
| Duncan to Calvia | 5,233.52 mi (8,422.53 km) |
| Duncan to Camas | 4,917.08 mi (7,913.27 km) |
| Duncan to Cambados | 4,622.22 mi (7,438.74 km) |
| Duncan to Cambre | 4,619.32 mi (7,434.08 km) |
| Duncan to Cambrils | 5,113.20 mi (8,228.90 km) |
