| Merthyr Tudful to Grovetown (Georgia) | 3,993.37 mi (6,426.71 km) |
| Merthyr Tudful to Guayama (Puerto Rico) | 4,089.82 mi (6,581.92 km) |
| Merthyr Tudful to Guaynabo (Puerto Rico) | 4,068.28 mi (6,547.26 km) |
| Merthyr Tudful to Gulf Shores (Alabama) | 4,375.97 mi (7,042.44 km) |
| Merthyr Tudful to Gulfport (Florida) | 4,294.77 mi (6,911.77 km) |
| Merthyr Tudful to Gulfport (Mississippi) | 4,424.55 mi (7,120.63 km) |
| Merthyr Tudful to Gunbarrel (Colorado) | 4,552.28 mi (7,326.19 km) |
| Merthyr Tudful to Gurnee (Illinois) | 3,805.07 mi (6,123.67 km) |
| Merthyr Tudful to Guthrie (Oklahoma) | 4,483.81 mi (7,215.99 km) |
| Merthyr Tudful to Guttenberg (New Jersey) | 3,319.73 mi (5,342.60 km) |
| Merthyr Tudful to Guymon (Oklahoma) | 4,592.68 mi (7,391.20 km) |
| Merthyr Tudful to Hacienda Heights (California) | 5,318.31 mi (8,558.99 km) |
| Merthyr Tudful to Hackensack (New Jersey) | 3,317.32 mi (5,338.70 km) |
| Merthyr Tudful to Hackettstown (New Jersey) | 3,350.79 mi (5,392.57 km) |
| Merthyr Tudful to Hagerstown (Maryland) | 3,522.17 mi (5,668.39 km) |
