| Mason City to Civril | 5,771.84 mi (9,288.89 km) |
| Mason City to Cizre | 6,211.38 mi (9,996.25 km) |
| Mason City to Cobanlar | 5,784.58 mi (9,309.38 km) |
| Mason City to Corlu | 5,553.84 mi (8,938.05 km) |
| Mason City to Corum | 5,813.70 mi (9,356.25 km) |
| Mason City to Cukurca | 6,256.10 mi (10,068.22 km) |
| Mason City to Cukurcayir | 5,928.62 mi (9,541.19 km) |
| Mason City to Cumayeri | 5,670.97 mi (9,126.55 km) |
| Mason City to Cumra | 5,911.80 mi (9,514.13 km) |
| Mason City to Cungus | 6,076.38 mi (9,778.99 km) |
| Mason City to Dargecit | 6,185.64 mi (9,954.82 km) |
| Mason City to Davutlar | 5,719.52 mi (9,204.68 km) |
| Mason City to Demirozu | 5,979.96 mi (9,623.82 km) |
| Mason City to Demre | 5,892.08 mi (9,482.38 km) |
| Mason City to Denizciler | 6,073.59 mi (9,774.50 km) |
