| Keystone to Civril | 6,102.81 mi (9,821.52 km) |
| Keystone to Cizre | 6,671.19 mi (10,736.24 km) |
| Keystone to Cobanlar | 6,132.61 mi (9,869.48 km) |
| Keystone to Corlu | 5,906.15 mi (9,505.03 km) |
| Keystone to Corum | 6,232.35 mi (10,030.00 km) |
| Keystone to Cukurca | 6,731.94 mi (10,834.01 km) |
| Keystone to Cukurcayir | 6,404.64 mi (10,307.26 km) |
| Keystone to Cumayeri | 6,051.68 mi (9,739.23 km) |
| Keystone to Cumra | 6,265.91 mi (10,084.00 km) |
| Keystone to Cungus | 6,513.05 mi (10,481.75 km) |
| Keystone to Dargecit | 6,642.47 mi (10,690.02 km) |
| Keystone to Davutlar | 6,015.81 mi (9,681.51 km) |
| Keystone to Demirozu | 6,447.83 mi (10,376.79 km) |
| Keystone to Demre | 6,195.97 mi (9,971.45 km) |
| Keystone to Denizciler | 6,454.42 mi (10,387.39 km) |
