| Merthyr Tudful to Carmignano | 861.39 mi (1,386.28 km) |
| Merthyr Tudful to Carovigno | 1,254.95 mi (2,019.64 km) |
| Merthyr Tudful to Carpenedolo | 768.12 mi (1,236.16 km) |
| Merthyr Tudful to Carpi | 811.03 mi (1,305.22 km) |
| Merthyr Tudful to Carrara | 816.27 mi (1,313.66 km) |
| Merthyr Tudful to Carugate | 719.33 mi (1,157.65 km) |
| Merthyr Tudful to Casal di Principe | 1,111.01 mi (1,787.99 km) |
| Merthyr Tudful to Casale Monferrato | 707.61 mi (1,138.79 km) |
| Merthyr Tudful to Casale sul Sile | 830.56 mi (1,336.66 km) |
| Merthyr Tudful to Casalecchio di Reno | 839.50 mi (1,351.04 km) |
| Merthyr Tudful to Casalgrande | 814.77 mi (1,311.25 km) |
| Merthyr Tudful to Casalmaggiore | 784.57 mi (1,262.64 km) |
| Merthyr Tudful to Casalnuovo di Napoli | 1,123.73 mi (1,808.46 km) |
| Merthyr Tudful to Casalpusterlengo | 747.89 mi (1,203.61 km) |
| Merthyr Tudful to Casaluce | 1,114.20 mi (1,793.13 km) |
