| Merthyr Tudful to Gonzalez (Florida) | 4,343.77 mi (6,990.62 km) |
| Merthyr Tudful to Goodlettsville (Tennessee) | 4,038.60 mi (6,499.50 km) |
| Merthyr Tudful to Goodyear (Arizona) | 5,167.95 mi (8,317.02 km) |
| Merthyr Tudful to Goose Creek (South Carolina) | 3,923.84 mi (6,314.81 km) |
| Merthyr Tudful to Goshen (Indiana) | 3,759.67 mi (6,050.61 km) |
| Merthyr Tudful to Goulds (Florida) | 4,306.61 mi (6,930.81 km) |
| Merthyr Tudful to Grafton (Wisconsin) | 3,762.37 mi (6,054.94 km) |
| Merthyr Tudful to Graham (North Carolina) | 3,753.40 mi (6,040.51 km) |
| Merthyr Tudful to Graham (Washington) | 4,715.44 mi (7,588.77 km) |
| Merthyr Tudful to Grain Valley (Missouri) | 4,203.06 mi (6,764.16 km) |
| Merthyr Tudful to Granbury (Texas) | 4,669.78 mi (7,515.29 km) |
| Merthyr Tudful to Grand Forks (North Dakota) | 3,884.58 mi (6,251.62 km) |
| Merthyr Tudful to Grand Haven (Michigan) | 3,708.10 mi (5,967.61 km) |
| Merthyr Tudful to Grand Island (Nebraska) | 4,264.64 mi (6,863.27 km) |
| Merthyr Tudful to Grand Junction (Colorado) | 4,721.49 mi (7,598.50 km) |
