| Merthyr Tudful to Collegno | 680.10 mi (1,094.51 km) |
| Merthyr Tudful to Cologno al Serio | 731.28 mi (1,176.88 km) |
| Merthyr Tudful to Cologno Monzese | 718.30 mi (1,155.99 km) |
| Merthyr Tudful to Colorno | 785.82 mi (1,264.66 km) |
| Merthyr Tudful to Comacchio | 863.20 mi (1,389.19 km) |
| Merthyr Tudful to Comiso | 1,346.69 mi (2,167.29 km) |
| Merthyr Tudful to Como | 698.55 mi (1,124.21 km) |
| Merthyr Tudful to Concordia Sagittaria | 844.07 mi (1,358.40 km) |
| Merthyr Tudful to Concorezzo | 717.62 mi (1,154.91 km) |
| Merthyr Tudful to Conegliano | 817.55 mi (1,315.72 km) |
| Merthyr Tudful to Conselice | 858.30 mi (1,381.30 km) |
| Merthyr Tudful to Conselve | 827.95 mi (1,332.46 km) |
| Merthyr Tudful to Conversano | 1,221.52 mi (1,965.85 km) |
| Merthyr Tudful to Copertino | 1,290.33 mi (2,076.59 km) |
| Merthyr Tudful to Copparo | 841.17 mi (1,353.74 km) |
