| South Houston to Castelfidardo | 5,672.61 mi (9,129.18 km) |
| South Houston to Castelfiorentino | 5,559.16 mi (8,946.60 km) |
| South Houston to Castelfranco di Sopra | 5,583.28 mi (8,985.42 km) |
| South Houston to Castelfranco di Sotto | 5,546.31 mi (8,925.93 km) |
| South Houston to Castelfranco Emilia | 5,526.13 mi (8,893.44 km) |
| South Houston to Castelfranco Veneto | 5,522.88 mi (8,888.22 km) |
| South Houston to Castellabate | 5,856.75 mi (9,425.52 km) |
| South Houston to Castellammare del Golfo | 5,853.33 mi (9,420.02 km) |
| South Houston to Castellammare di Stabia | 5,819.95 mi (9,366.31 km) |
| South Houston to Castellamonte | 5,358.26 mi (8,623.28 km) |
| South Houston to Castellana Grotte | 5,926.78 mi (9,538.23 km) |
| South Houston to Castellaneta | 5,927.15 mi (9,538.82 km) |
| South Houston to Castellanza | 5,399.81 mi (8,690.16 km) |
| South Houston to Castellarano | 5,515.98 mi (8,877.11 km) |
| South Houston to Castelleone | 5,447.00 mi (8,766.10 km) |
