| Round Rock to Casamassima | 5,971.71 mi (9,610.53 km) |
| Round Rock to Casandrino | 5,861.94 mi (9,433.88 km) |
| Round Rock to Casapulla | 5,857.83 mi (9,427.27 km) |
| Round Rock to Casarano | 6,063.29 mi (9,757.92 km) |
| Round Rock to Casatenovo | 5,470.24 mi (8,803.50 km) |
| Round Rock to Casciana Terme | 5,606.72 mi (9,023.15 km) |
| Round Rock to Cascina | 5,597.84 mi (9,008.86 km) |
| Round Rock to Caselle Torinese | 5,421.48 mi (8,725.03 km) |
| Round Rock to Caserta | 5,859.92 mi (9,430.63 km) |
| Round Rock to Casier | 5,591.77 mi (8,999.08 km) |
| Round Rock to Casorate Primo | 5,472.58 mi (8,807.27 km) |
| Round Rock to Casoria | 5,865.41 mi (9,439.46 km) |
| Round Rock to Cassano al Ionio | 5,996.64 mi (9,650.66 km) |
| Round Rock to Cassano d'Adda | 5,484.76 mi (8,826.87 km) |
| Round Rock to Cassano delle Murge | 5,968.41 mi (9,605.23 km) |
