| South Houston to Cividale del Friuli | 5,567.12 mi (8,959.41 km) |
| South Houston to Civita Castellana | 5,669.27 mi (9,123.82 km) |
| South Houston to Civitanova Marche | 5,686.74 mi (9,151.92 km) |
| South Houston to Civitavecchia | 5,650.51 mi (9,093.62 km) |
| South Houston to Civitella in Val di Chiana | 5,597.67 mi (9,008.58 km) |
| South Houston to Clusone | 5,433.80 mi (8,744.86 km) |
| South Houston to Coccaglio | 5,446.44 mi (8,765.19 km) |
| South Houston to Codigoro | 5,561.45 mi (8,950.29 km) |
| South Houston to Codogno | 5,449.53 mi (8,770.17 km) |
| South Houston to Codroipo | 5,554.12 mi (8,938.50 km) |
| South Houston to Cogoleto | 5,432.30 mi (8,742.44 km) |
| South Houston to Colle di Val d'Elsa | 5,573.60 mi (8,969.84 km) |
| South Houston to Colle Salvetti | 5,538.66 mi (8,913.61 km) |
| South Houston to Collecchio | 5,485.64 mi (8,828.28 km) |
| South Houston to Colleferro | 5,716.70 mi (9,200.15 km) |
