| Round Rock to Cognac | 5,067.30 mi (8,155.03 km) |
| Round Rock to Cogolin | 5,444.65 mi (8,762.32 km) |
| Round Rock to Colmar | 5,304.43 mi (8,536.66 km) |
| Round Rock to Colombes | 5,072.49 mi (8,163.38 km) |
| Round Rock to Colomiers | 5,206.62 mi (8,379.24 km) |
| Round Rock to Combs-la-Ville | 5,093.06 mi (8,196.49 km) |
| Round Rock to Comines | 5,043.25 mi (8,116.33 km) |
| Round Rock to Compiegne | 5,079.45 mi (8,174.58 km) |
| Round Rock to Concarneau | 4,849.27 mi (7,804.15 km) |
| Round Rock to Conde-sur-l'Escaut | 5,075.93 mi (8,168.92 km) |
| Round Rock to Conflans-Sainte-Honorine | 5,063.88 mi (8,149.53 km) |
| Round Rock to Corbas | 5,290.01 mi (8,513.45 km) |
| Round Rock to Corbeil-Essonnes | 5,091.73 mi (8,194.35 km) |
| Round Rock to Cormeilles-en-Parisis | 5,068.83 mi (8,157.50 km) |
| Round Rock to Cosne sur Loire | 5,149.11 mi (8,286.70 km) |
