| Merthyr Tudful to Chivasso | 685.13 mi (1,102.61 km) |
| Merthyr Tudful to Ciampino | 1,017.54 mi (1,637.58 km) |
| Merthyr Tudful to Cicciano | 1,127.64 mi (1,814.76 km) |
| Merthyr Tudful to Cingoli | 962.58 mi (1,549.12 km) |
| Merthyr Tudful to Cinisello Balsamo | 715.08 mi (1,150.81 km) |
| Merthyr Tudful to Cinisi | 1,230.71 mi (1,980.63 km) |
| Merthyr Tudful to Cirie | 673.17 mi (1,083.36 km) |
| Merthyr Tudful to Ciro Marina | 1,301.52 mi (2,094.59 km) |
| Merthyr Tudful to Cislago | 701.44 mi (1,128.86 km) |
| Merthyr Tudful to Cisterna di Latina | 1,036.17 mi (1,667.55 km) |
| Merthyr Tudful to Cisternino | 1,244.63 mi (2,003.03 km) |
| Merthyr Tudful to Citta di Castello | 922.56 mi (1,484.71 km) |
| Merthyr Tudful to Citta Sant'Angelo | 1,033.55 mi (1,663.34 km) |
| Merthyr Tudful to Cittadella | 807.17 mi (1,299.02 km) |
| Merthyr Tudful to Cittanova | 1,318.33 mi (2,121.64 km) |
