| Merthyr Tudful to Cernavoda | 1,524.56 mi (2,453.54 km) |
| Merthyr Tudful to Chitila | 1,431.60 mi (2,303.94 km) |
| Merthyr Tudful to Cisnadie | 1,312.82 mi (2,112.77 km) |
| Merthyr Tudful to Cluj-Napoca | 1,255.45 mi (2,020.45 km) |
| Merthyr Tudful to Codlea | 1,368.25 mi (2,201.99 km) |
| Merthyr Tudful to Comanesti | 1,387.96 mi (2,233.70 km) |
| Merthyr Tudful to Comarnic | 1,391.19 mi (2,238.91 km) |
| Merthyr Tudful to Constanta | 1,556.11 mi (2,504.31 km) |
| Merthyr Tudful to Corabia | 1,396.27 mi (2,247.09 km) |
| Merthyr Tudful to Costesti | 1,379.34 mi (2,219.84 km) |
| Merthyr Tudful to Covasna | 1,394.87 mi (2,244.83 km) |
| Merthyr Tudful to Craiova | 1,346.73 mi (2,167.36 km) |
| Merthyr Tudful to Cristuru Secuiesc | 1,331.87 mi (2,143.43 km) |
| Merthyr Tudful to Cugir | 1,275.15 mi (2,052.16 km) |
| Merthyr Tudful to Cumpana | 1,554.74 mi (2,502.11 km) |
