| Houston to Castelletto sopra Ticino | 5,385.64 mi (8,667.35 km) |
| Houston to Castelli Calepio | 5,441.03 mi (8,756.50 km) |
| Houston to Castelnovo ne' Monti | 5,505.33 mi (8,859.97 km) |
| Houston to Castelnuovo Berardenga | 5,591.92 mi (8,999.33 km) |
| Houston to Castelnuovo di Porto | 5,680.09 mi (9,141.22 km) |
| Houston to Castelnuovo di Verona | 5,483.99 mi (8,825.62 km) |
| Houston to Castelnuovo Rangone | 5,523.32 mi (8,888.93 km) |
| Houston to Castelvetrano | 5,864.20 mi (9,437.52 km) |
| Houston to Castelvetro di Modena | 5,525.86 mi (8,893.01 km) |
| Houston to Castenaso | 5,547.16 mi (8,927.29 km) |
| Houston to Castenedolo | 5,463.28 mi (8,792.30 km) |
| Houston to Castiglion Fiorentino | 5,609.54 mi (9,027.69 km) |
| Houston to Castiglione del Lago | 5,622.72 mi (9,048.89 km) |
| Houston to Castiglione delle Stiviere | 5,474.22 mi (8,809.91 km) |
| Houston to Castrolibero | 5,950.18 mi (9,575.89 km) |
