| Duncan to Castrovillari | 5,803.96 mi (9,340.57 km) |
| Duncan to Catania | 5,862.84 mi (9,435.32 km) |
| Duncan to Catanzaro | 5,861.67 mi (9,433.44 km) |
| Duncan to Cattolica | 5,483.79 mi (8,825.30 km) |
| Duncan to Cava de' Tirreni | 5,704.18 mi (9,179.99 km) |
| Duncan to Cavallino | 5,860.33 mi (9,431.29 km) |
| Duncan to Cavarzere | 5,408.68 mi (8,704.43 km) |
| Duncan to Cave | 5,584.30 mi (8,987.06 km) |
| Duncan to Cavriago | 5,366.75 mi (8,636.94 km) |
| Duncan to Cavriglia | 5,453.76 mi (8,776.99 km) |
| Duncan to Cazzago San Martino | 5,310.54 mi (8,546.48 km) |
| Duncan to Ceccano | 5,611.21 mi (9,030.37 km) |
| Duncan to Cecina | 5,423.61 mi (8,728.46 km) |
| Duncan to Cefalu | 5,794.25 mi (9,324.94 km) |
| Duncan to Ceglie Messapico | 5,817.56 mi (9,362.46 km) |
