| Merthyr Tudful to Glen Parva | 110.54 mi (177.90 km) |
| Merthyr Tudful to Glenfield | 111.26 mi (179.05 km) |
| Merthyr Tudful to Glenrothes | 307.92 mi (495.55 km) |
| Merthyr Tudful to Glossop | 131.88 mi (212.24 km) |
| Merthyr Tudful to Gloucester | 49.15 mi (79.10 km) |
| Merthyr Tudful to Godalming | 125.34 mi (201.71 km) |
| Merthyr Tudful to Golborne | 124.16 mi (199.81 km) |
| Merthyr Tudful to Goodmayes | 150.16 mi (241.66 km) |
| Merthyr Tudful to Goole | 171.13 mi (275.40 km) |
| Merthyr Tudful to Gorleston-on-Sea | 223.70 mi (360.02 km) |
| Merthyr Tudful to Gornalwood | 75.71 mi (121.85 km) |
| Merthyr Tudful to Gosforth | 236.82 mi (381.12 km) |
| Merthyr Tudful to Gosport | 117.40 mi (188.93 km) |
| Merthyr Tudful to Gourock | 296.78 mi (477.62 km) |
| Merthyr Tudful to Grangemouth | 295.28 mi (475.21 km) |
