| South Houston to Castelletto sopra Ticino | 5,385.21 mi (8,666.66 km) |
| South Houston to Castelli Calepio | 5,440.69 mi (8,755.95 km) |
| South Houston to Castelnovo ne' Monti | 5,504.79 mi (8,859.11 km) |
| South Houston to Castelnuovo Berardenga | 5,591.28 mi (8,998.29 km) |
| South Houston to Castelnuovo di Porto | 5,679.30 mi (9,139.95 km) |
| South Houston to Castelnuovo di Verona | 5,483.68 mi (8,825.13 km) |
| South Houston to Castelnuovo Rangone | 5,522.86 mi (8,888.18 km) |
| South Houston to Castelvetrano | 5,862.61 mi (9,434.96 km) |
| South Houston to Castelvetro di Modena | 5,525.39 mi (8,892.25 km) |
| South Houston to Castenaso | 5,546.73 mi (8,926.60 km) |
| South Houston to Castenedolo | 5,462.94 mi (8,791.75 km) |
| South Houston to Castiglion Fiorentino | 5,608.93 mi (9,026.70 km) |
| South Houston to Castiglione del Lago | 5,622.08 mi (9,047.87 km) |
| South Houston to Castiglione delle Stiviere | 5,473.88 mi (8,809.36 km) |
| South Houston to Castrolibero | 5,949.23 mi (9,574.36 km) |
