| Merthyr Tudful to San Baudilio de Llobregat | 762.61 mi (1,227.31 km) |
| Merthyr Tudful to San Celoni | 747.57 mi (1,203.10 km) |
| Merthyr Tudful to San Cugat del Valles | 754.92 mi (1,214.92 km) |
| Merthyr Tudful to San Fausto de Campcentellas | 755.30 mi (1,215.55 km) |
| Merthyr Tudful to San Feliu de Guixols | 751.49 mi (1,209.41 km) |
| Merthyr Tudful to San Feliu de Llobregat | 760.18 mi (1,223.40 km) |
| Merthyr Tudful to San Fernando | 1,064.53 mi (1,713.19 km) |
| Merthyr Tudful to San Fernando de Henares | 781.99 mi (1,258.50 km) |
| Merthyr Tudful to San Fructuoso de Bages | 733.31 mi (1,180.14 km) |
| Merthyr Tudful to San Javier | 971.00 mi (1,562.68 km) |
| Merthyr Tudful to San Juan de Alicante | 932.72 mi (1,501.07 km) |
| Merthyr Tudful to San Juan de Aznalfarache | 1,001.59 mi (1,611.91 km) |
| Merthyr Tudful to San Juan de Vilasar | 757.91 mi (1,219.75 km) |
| Merthyr Tudful to San Juan del Puerto | 1,010.89 mi (1,626.87 km) |
| Merthyr Tudful to San Juan Despi | 761.48 mi (1,225.48 km) |
