| Round Rock to Chivasso | 5,430.92 mi (8,740.22 km) |
| Round Rock to Ciampino | 5,757.53 mi (9,265.85 km) |
| Round Rock to Cicciano | 5,872.41 mi (9,450.73 km) |
| Round Rock to Cingoli | 5,719.90 mi (9,205.29 km) |
| Round Rock to Cinisello Balsamo | 5,471.96 mi (8,806.28 km) |
| Round Rock to Cinisi | 5,926.02 mi (9,537.01 km) |
| Round Rock to Cirie | 5,417.46 mi (8,718.56 km) |
| Round Rock to Ciro Marina | 6,048.27 mi (9,733.75 km) |
| Round Rock to Cislago | 5,458.06 mi (8,783.90 km) |
| Round Rock to Cisterna di Latina | 5,775.52 mi (9,294.81 km) |
| Round Rock to Cisternino | 6,002.16 mi (9,659.55 km) |
| Round Rock to Citta di Castello | 5,676.36 mi (9,135.22 km) |
| Round Rock to Citta Sant'Angelo | 5,788.55 mi (9,315.77 km) |
| Round Rock to Cittadella | 5,571.26 mi (8,966.08 km) |
| Round Rock to Cittanova | 6,047.64 mi (9,732.74 km) |
