| Glenn Dale to Collegno | 4,149.13 mi (6,677.38 km) |
| Glenn Dale to Cologno al Serio | 4,225.06 mi (6,799.58 km) |
| Glenn Dale to Cologno Monzese | 4,208.72 mi (6,773.28 km) |
| Glenn Dale to Colorno | 4,275.48 mi (6,880.73 km) |
| Glenn Dale to Comacchio | 4,360.53 mi (7,017.60 km) |
| Glenn Dale to Comiso | 4,748.04 mi (7,641.23 km) |
| Glenn Dale to Como | 4,191.54 mi (6,745.64 km) |
| Glenn Dale to Concordia Sagittaria | 4,352.73 mi (7,005.04 km) |
| Glenn Dale to Concorezzo | 4,209.25 mi (6,774.13 km) |
| Glenn Dale to Conegliano | 4,325.45 mi (6,961.13 km) |
| Glenn Dale to Conselice | 4,351.73 mi (7,003.43 km) |
| Glenn Dale to Conselve | 4,329.06 mi (6,966.95 km) |
| Glenn Dale to Conversano | 4,708.13 mi (7,577.01 km) |
| Glenn Dale to Copertino | 4,775.68 mi (7,685.72 km) |
| Glenn Dale to Copparo | 4,338.81 mi (6,982.64 km) |
