| Merthyr Tudful to Casamassima | 1,214.90 mi (1,955.19 km) |
| Merthyr Tudful to Casandrino | 1,119.37 mi (1,801.45 km) |
| Merthyr Tudful to Casapulla | 1,113.73 mi (1,792.38 km) |
| Merthyr Tudful to Casarano | 1,306.94 mi (2,103.32 km) |
| Merthyr Tudful to Casatenovo | 711.85 mi (1,145.61 km) |
| Merthyr Tudful to Casciana Terme | 861.60 mi (1,386.60 km) |
| Merthyr Tudful to Cascina | 851.49 mi (1,370.33 km) |
| Merthyr Tudful to Caselle Torinese | 677.60 mi (1,090.49 km) |
| Merthyr Tudful to Caserta | 1,115.49 mi (1,795.22 km) |
| Merthyr Tudful to Casier | 827.22 mi (1,331.28 km) |
| Merthyr Tudful to Casorate Primo | 718.64 mi (1,156.54 km) |
| Merthyr Tudful to Casoria | 1,122.82 mi (1,807.01 km) |
| Merthyr Tudful to Cassano al Ionio | 1,251.32 mi (2,013.80 km) |
| Merthyr Tudful to Cassano d'Adda | 726.79 mi (1,169.65 km) |
| Merthyr Tudful to Cassano delle Murge | 1,212.59 mi (1,951.48 km) |
