| Herndon to Cernavoda | 5,046.66 mi (8,121.82 km) |
| Herndon to Chitila | 4,959.47 mi (7,981.50 km) |
| Herndon to Cisnadie | 4,838.19 mi (7,786.32 km) |
| Herndon to Cluj-Napoca | 4,773.81 mi (7,682.70 km) |
| Herndon to Codlea | 4,889.18 mi (7,868.37 km) |
| Herndon to Comanesti | 4,897.50 mi (7,881.76 km) |
| Herndon to Comarnic | 4,915.02 mi (7,909.97 km) |
| Herndon to Constanta | 5,077.25 mi (8,171.04 km) |
| Herndon to Corabia | 4,931.33 mi (7,936.21 km) |
| Herndon to Costesti | 4,909.42 mi (7,900.94 km) |
| Herndon to Covasna | 4,911.49 mi (7,904.29 km) |
| Herndon to Craiova | 4,880.96 mi (7,855.14 km) |
| Herndon to Cristuru Secuiesc | 4,849.01 mi (7,803.72 km) |
| Herndon to Cugir | 4,802.09 mi (7,728.22 km) |
| Herndon to Cumpana | 5,076.58 mi (8,169.97 km) |
