| Glenn Dale to Cortona | 4,400.77 mi (7,082.35 km) |
| Glenn Dale to Cosenza | 4,733.29 mi (7,617.49 km) |
| Glenn Dale to Cossato | 4,159.66 mi (6,694.32 km) |
| Glenn Dale to Costa Volpino | 4,234.18 mi (6,814.25 km) |
| Glenn Dale to Creazzo | 4,302.77 mi (6,924.64 km) |
| Glenn Dale to Crema | 4,231.30 mi (6,809.62 km) |
| Glenn Dale to Cremona | 4,253.89 mi (6,845.98 km) |
| Glenn Dale to Crevalcore | 4,315.64 mi (6,945.35 km) |
| Glenn Dale to Crispiano | 4,727.18 mi (7,607.65 km) |
| Glenn Dale to Crosia | 4,746.09 mi (7,638.09 km) |
| Glenn Dale to Crotone | 4,780.21 mi (7,693.00 km) |
| Glenn Dale to Cuneo | 4,169.88 mi (6,710.78 km) |
| Glenn Dale to Cuorgne | 4,142.80 mi (6,667.19 km) |
| Glenn Dale to Cusano Milanino | 4,203.96 mi (6,765.62 km) |
| Glenn Dale to Cutro | 4,776.18 mi (7,686.52 km) |
