| Merthyr Tudful to Cascais | 947.07 mi (1,524.17 km) |
| Merthyr Tudful to Castelo Branco | 847.27 mi (1,363.55 km) |
| Merthyr Tudful to Castro Daire | 779.68 mi (1,254.77 km) |
| Merthyr Tudful to Celorico de Basto | 748.31 mi (1,204.30 km) |
| Merthyr Tudful to Chamusca | 890.63 mi (1,433.34 km) |
| Merthyr Tudful to Chaves | 717.46 mi (1,154.65 km) |
| Merthyr Tudful to Cinfaes | 769.03 mi (1,237.63 km) |
| Merthyr Tudful to Coimbra | 832.36 mi (1,339.55 km) |
| Merthyr Tudful to Condeixa-a-Nova | 839.63 mi (1,351.26 km) |
| Merthyr Tudful to Corroios | 948.90 mi (1,527.10 km) |
| Merthyr Tudful to Coruche | 917.54 mi (1,476.64 km) |
| Merthyr Tudful to Costa de Caparica | 948.11 mi (1,525.84 km) |
| Merthyr Tudful to Covilha | 815.78 mi (1,312.86 km) |
| Merthyr Tudful to Eiras | 830.22 mi (1,336.11 km) |
| Merthyr Tudful to Elvas | 908.03 mi (1,461.34 km) |
