| Duncan to Campo de Criptana | 4,984.89 mi (8,022.41 km) |
| Duncan to Campos del Puerto | 5,261.52 mi (8,467.59 km) |
| Duncan to Canals | 5,116.64 mi (8,234.43 km) |
| Duncan to Candelaria | 4,693.27 mi (7,553.08 km) |
| Duncan to Canet de Mar | 5,160.50 mi (8,305.02 km) |
| Duncan to Cangas | 4,630.31 mi (7,451.76 km) |
| Duncan to Cangas de Narcea | 4,703.36 mi (7,569.33 km) |
| Duncan to Canovellas | 5,146.42 mi (8,282.36 km) |
| Duncan to Canteras | 5,144.72 mi (8,279.62 km) |
| Duncan to Cantillana | 4,920.64 mi (7,919.01 km) |
| Duncan to Capdepera | 5,269.54 mi (8,480.51 km) |
| Duncan to Carballo | 4,605.55 mi (7,411.92 km) |
| Duncan to Carcagente | 5,116.97 mi (8,234.97 km) |
| Duncan to Cardedeu | 5,148.94 mi (8,286.43 km) |
| Duncan to Carlet | 5,109.89 mi (8,223.57 km) |
