| Duncan to Cermik | 6,720.74 mi (10,815.98 km) |
| Duncan to Cesme | 6,265.38 mi (10,083.15 km) |
| Duncan to Ceyhan | 6,667.32 mi (10,730.01 km) |
| Duncan to Ceylanpinar | 6,812.99 mi (10,964.45 km) |
| Duncan to Cicekdagi | 6,479.43 mi (10,427.63 km) |
| Duncan to Cide | 6,309.79 mi (10,154.63 km) |
| Duncan to Cifteler | 6,379.06 mi (10,266.10 km) |
| Duncan to Ciftlik | 6,560.70 mi (10,558.43 km) |
| Duncan to Ciftlikkoy | 6,253.02 mi (10,063.27 km) |
| Duncan to Cihanbeyli | 6,482.01 mi (10,431.78 km) |
| Duncan to Cildir | 6,653.19 mi (10,707.28 km) |
| Duncan to Cilimli | 6,298.96 mi (10,137.20 km) |
| Duncan to Cinar | 6,773.72 mi (10,901.24 km) |
| Duncan to Cinarcik | 6,246.97 mi (10,053.53 km) |
| Duncan to Cine | 6,366.28 mi (10,245.54 km) |
