| Merthyr Tudful to Fuente-Alamo de Murcia | 973.39 mi (1,566.52 km) |
| Merthyr Tudful to Galapagar | 772.11 mi (1,242.59 km) |
| Merthyr Tudful to Galdacano | 588.67 mi (947.37 km) |
| Merthyr Tudful to Gandia | 896.05 mi (1,442.06 km) |
| Merthyr Tudful to Garrucha | 1,008.78 mi (1,623.47 km) |
| Merthyr Tudful to Gava | 764.56 mi (1,230.44 km) |
| Merthyr Tudful to Gelves | 1,003.88 mi (1,615.60 km) |
| Merthyr Tudful to Getafe | 790.49 mi (1,272.17 km) |
| Merthyr Tudful to Gibraleon | 1,008.01 mi (1,622.24 km) |
| Merthyr Tudful to Gijon | 577.36 mi (929.18 km) |
| Merthyr Tudful to Gines | 1,000.55 mi (1,610.23 km) |
| Merthyr Tudful to Girona | 734.44 mi (1,181.97 km) |
| Merthyr Tudful to Godella | 856.41 mi (1,378.27 km) |
| Merthyr Tudful to Gondomar | 711.83 mi (1,145.59 km) |
| Merthyr Tudful to Grado | 590.68 mi (950.60 km) |
