| Merthyr Tudful to Great Bend (Kansas) | 4,408.52 mi (7,094.82 km) |
| Merthyr Tudful to Great Falls (Montana) | 4,369.51 mi (7,032.05 km) |
| Merthyr Tudful to Great Falls (Virginia) | 3,532.92 mi (5,685.68 km) |
| Merthyr Tudful to Great Neck (New York) | 3,308.14 mi (5,323.94 km) |
| Merthyr Tudful to Greeley (Colorado) | 4,520.07 mi (7,274.35 km) |
| Merthyr Tudful to Green (Ohio) | 3,615.79 mi (5,819.06 km) |
| Merthyr Tudful to Green Bay (Wisconsin) | 3,710.42 mi (5,971.35 km) |
| Merthyr Tudful to Green River (Wyoming) | 4,624.12 mi (7,441.81 km) |
| Merthyr Tudful to Green Valley (Arizona) | 5,197.68 mi (8,364.85 km) |
| Merthyr Tudful to Green Valley (Maryland) | 3,515.71 mi (5,657.99 km) |
| Merthyr Tudful to Greenacres (Florida) | 4,242.24 mi (6,827.23 km) |
| Merthyr Tudful to Greenbelt (Maryland) | 3,516.67 mi (5,659.53 km) |
| Merthyr Tudful to Greendale (Wisconsin) | 3,781.74 mi (6,086.13 km) |
| Merthyr Tudful to Greeneville (Tennessee) | 3,889.18 mi (6,259.03 km) |
| Merthyr Tudful to Greenfield (California) | 5,291.62 mi (8,516.04 km) |
