| Merthyr Tudful to Greenwood Village (Colorado) | 4,566.34 mi (7,348.81 km) |
| Merthyr Tudful to Greer (South Carolina) | 3,923.48 mi (6,314.23 km) |
| Merthyr Tudful to Grenada (Mississippi) | 4,287.61 mi (6,900.24 km) |
| Merthyr Tudful to Gresham (Oregon) | 4,805.92 mi (7,734.37 km) |
| Merthyr Tudful to Gretna (Louisiana) | 4,490.72 mi (7,227.12 km) |
| Merthyr Tudful to Griffin (Georgia) | 4,088.76 mi (6,580.22 km) |
| Merthyr Tudful to Griffith (Indiana) | 3,823.72 mi (6,153.68 km) |
| Merthyr Tudful to Grimes (Iowa) | 4,059.22 mi (6,532.68 km) |
| Merthyr Tudful to Grosse Pointe Park (Michigan) | 3,610.03 mi (5,809.78 km) |
| Merthyr Tudful to Grosse Pointe Woods (Michigan) | 3,606.33 mi (5,803.82 km) |
| Merthyr Tudful to Grove City (Ohio) | 3,728.13 mi (5,999.84 km) |
| Merthyr Tudful to Groveland (Florida) | 4,214.39 mi (6,782.40 km) |
| Merthyr Tudful to Grover Beach (California) | 5,340.63 mi (8,594.92 km) |
| Merthyr Tudful to Groves (Texas) | 4,645.57 mi (7,476.32 km) |
| Merthyr Tudful to Groveton (Virginia) | 3,535.74 mi (5,690.23 km) |
