| Houston to Carmignano | 5,553.89 mi (8,938.13 km) |
| Houston to Carovigno | 5,955.89 mi (9,585.07 km) |
| Houston to Carpenedolo | 5,472.69 mi (8,807.44 km) |
| Houston to Carpi | 5,512.65 mi (8,871.76 km) |
| Houston to Carrara | 5,505.62 mi (8,860.45 km) |
| Houston to Carugate | 5,420.59 mi (8,723.59 km) |
| Houston to Casal di Principe | 5,793.24 mi (9,323.32 km) |
| Houston to Casale Monferrato | 5,398.80 mi (8,688.53 km) |
| Houston to Casale sul Sile | 5,541.78 mi (8,918.64 km) |
| Houston to Casalecchio di Reno | 5,540.35 mi (8,916.34 km) |
| Houston to Casalgrande | 5,513.76 mi (8,873.54 km) |
| Houston to Casalmaggiore | 5,485.78 mi (8,828.52 km) |
| Houston to Casalnuovo di Napoli | 5,806.47 mi (9,344.61 km) |
| Houston to Casalpusterlengo | 5,447.05 mi (8,766.19 km) |
| Houston to Casaluce | 5,796.76 mi (9,328.98 km) |
