| Merthyr Tudful to Granada | 1,006.40 mi (1,619.64 km) |
| Merthyr Tudful to Granadilla de Abona | 1,769.65 mi (2,847.98 km) |
| Merthyr Tudful to Granollers | 749.44 mi (1,206.10 km) |
| Merthyr Tudful to Grinon | 796.71 mi (1,282.18 km) |
| Merthyr Tudful to Guadalajara | 767.64 mi (1,235.40 km) |
| Merthyr Tudful to Guadarrama | 765.62 mi (1,232.15 km) |
| Merthyr Tudful to Guadix | 997.99 mi (1,606.10 km) |
| Merthyr Tudful to Guardamar del Segura | 952.54 mi (1,532.96 km) |
| Merthyr Tudful to Guernica y Luno | 583.14 mi (938.47 km) |
| Merthyr Tudful to Guia de Isora | 1,767.42 mi (2,844.39 km) |
| Merthyr Tudful to Guillena | 990.37 mi (1,593.84 km) |
| Merthyr Tudful to Guimar | 1,753.26 mi (2,821.59 km) |
| Merthyr Tudful to Hellin | 917.51 mi (1,476.59 km) |
| Merthyr Tudful to Herencia | 855.11 mi (1,376.16 km) |
| Merthyr Tudful to Hernani | 589.32 mi (948.41 km) |
