| Glenn Dale to Cocentaina | 3,975.88 mi (6,398.56 km) |
| Glenn Dale to Coin | 3,828.04 mi (6,160.64 km) |
| Glenn Dale to Colindres | 3,700.56 mi (5,955.47 km) |
| Glenn Dale to Collado-Villalba | 3,748.75 mi (6,033.04 km) |
| Glenn Dale to Colmenar Viejo | 3,759.67 mi (6,050.60 km) |
| Glenn Dale to Colmenarejo | 3,750.37 mi (6,035.63 km) |
| Glenn Dale to Conil de la Frontera | 3,773.52 mi (6,072.90 km) |
| Glenn Dale to Consuegra | 3,801.41 mi (6,117.78 km) |
| Glenn Dale to Corbera de Llobregat | 4,006.86 mi (6,448.43 km) |
| Glenn Dale to Cordoba | 3,790.13 mi (6,099.62 km) |
| Glenn Dale to Coria del Rio | 3,744.92 mi (6,026.87 km) |
| Glenn Dale to Crevillente | 3,973.38 mi (6,394.53 km) |
| Glenn Dale to Cuarte de Huerva | 3,868.68 mi (6,226.04 km) |
| Glenn Dale to Cubellas | 4,001.10 mi (6,439.14 km) |
| Glenn Dale to Cuellar | 3,713.02 mi (5,975.52 km) |
