| South Portland to Glen Parva | 3,122.46 mi (5,025.11 km) |
| South Portland to Glenfield | 3,119.38 mi (5,020.16 km) |
| South Portland to Glenrothes | 2,978.93 mi (4,794.12 km) |
| South Portland to Glossop | 3,073.92 mi (4,946.99 km) |
| South Portland to Gloucester | 3,093.87 mi (4,979.11 km) |
| South Portland to Godalming | 3,175.48 mi (5,110.44 km) |
| South Portland to Golborne | 3,047.78 mi (4,904.93 km) |
| South Portland to Goodmayes | 3,196.20 mi (5,143.79 km) |
| South Portland to Goole | 3,111.37 mi (5,007.27 km) |
| South Portland to Gorleston-on-Sea | 3,237.58 mi (5,210.39 km) |
| South Portland to Gornalwood | 3,085.18 mi (4,965.11 km) |
| South Portland to Gosforth | 3,057.52 mi (4,920.60 km) |
| South Portland to Gosport | 3,163.14 mi (5,090.58 km) |
| South Portland to Gourock | 2,920.73 mi (4,700.45 km) |
| South Portland to Grangemouth | 2,961.46 mi (4,766.01 km) |
