| Houston to Castelfidardo | 5,673.05 mi (9,129.89 km) |
| Houston to Castelfiorentino | 5,559.81 mi (8,947.64 km) |
| Houston to Castelfranco di Sopra | 5,583.87 mi (8,986.37 km) |
| Houston to Castelfranco di Sotto | 5,546.96 mi (8,926.96 km) |
| Houston to Castelfranco Emilia | 5,526.57 mi (8,894.16 km) |
| Houston to Castelfranco Veneto | 5,523.05 mi (8,888.48 km) |
| Houston to Castellabate | 5,857.65 mi (9,426.97 km) |
| Houston to Castellammare del Golfo | 5,854.85 mi (9,422.47 km) |
| Houston to Castellammare di Stabia | 5,820.82 mi (9,367.71 km) |
| Houston to Castellamonte | 5,358.83 mi (8,624.20 km) |
| Houston to Castellana Grotte | 5,927.34 mi (9,539.14 km) |
| Houston to Castellaneta | 5,927.78 mi (9,539.84 km) |
| Houston to Castellanza | 5,400.24 mi (8,690.85 km) |
| Houston to Castellarano | 5,516.46 mi (8,877.88 km) |
| Houston to Castelleone | 5,447.42 mi (8,766.78 km) |
