| Merthyr Tudful to Chojnice | 882.88 mi (1,420.85 km) |
| Merthyr Tudful to Chojnow | 828.74 mi (1,333.74 km) |
| Merthyr Tudful to Chorzow | 971.67 mi (1,563.75 km) |
| Merthyr Tudful to Choszczno | 795.09 mi (1,279.57 km) |
| Merthyr Tudful to Chrzanow | 993.85 mi (1,599.45 km) |
| Merthyr Tudful to Ciechanow | 1,012.64 mi (1,629.68 km) |
| Merthyr Tudful to Ciechocinek | 935.65 mi (1,505.78 km) |
| Merthyr Tudful to Cieszyn | 968.32 mi (1,558.36 km) |
| Merthyr Tudful to Czarna Bialostocka | 1,119.42 mi (1,801.54 km) |
| Merthyr Tudful to Czarnkow | 843.34 mi (1,357.23 km) |
| Merthyr Tudful to Czechowice-Dziedzice | 981.12 mi (1,578.95 km) |
| Merthyr Tudful to Czeladz | 976.79 mi (1,571.99 km) |
| Merthyr Tudful to Czersk Pomorski | 900.24 mi (1,448.79 km) |
| Merthyr Tudful to Czestochowa | 970.68 mi (1,562.16 km) |
| Merthyr Tudful to Czluchow | 875.36 mi (1,408.76 km) |
