| Herndon to Castelletto sopra Ticino | 4,200.63 mi (6,760.26 km) |
| Herndon to Castelli Calepio | 4,257.46 mi (6,851.73 km) |
| Herndon to Castelnovo ne' Monti | 4,318.42 mi (6,949.83 km) |
| Herndon to Castelnuovo Berardenga | 4,403.15 mi (7,086.18 km) |
| Herndon to Castelnuovo di Porto | 4,489.18 mi (7,224.63 km) |
| Herndon to Castelnuovo di Verona | 4,300.95 mi (6,921.71 km) |
| Herndon to Castelnuovo Rangone | 4,337.51 mi (6,980.55 km) |
| Herndon to Castelvetrano | 4,664.49 mi (7,506.78 km) |
| Herndon to Castelvetro di Modena | 4,339.91 mi (6,984.41 km) |
| Herndon to Castenaso | 4,361.97 mi (7,019.91 km) |
| Herndon to Castenedolo | 4,279.70 mi (6,887.51 km) |
| Herndon to Castiglion Fiorentino | 4,421.31 mi (7,115.40 km) |
| Herndon to Castiglione del Lago | 4,434.05 mi (7,135.91 km) |
| Herndon to Castiglione delle Stiviere | 4,290.68 mi (6,905.19 km) |
| Herndon to Castrolibero | 4,756.89 mi (7,655.48 km) |
