| South Portland to Grayslake (Illinois) | 899.54 mi (1,447.68 km) |
| South Portland to Great Bend (Kansas) | 1,522.68 mi (2,450.51 km) |
| South Portland to Great Falls (Montana) | 1,978.23 mi (3,183.65 km) |
| South Portland to Great Falls (Virginia) | 483.70 mi (778.45 km) |
| South Portland to Great Neck (New York) | 263.08 mi (423.38 km) |
| South Portland to Greeley (Colorado) | 1,770.84 mi (2,849.89 km) |
| South Portland to Green (Ohio) | 600.48 mi (966.38 km) |
| South Portland to Green Bay (Wisconsin) | 879.03 mi (1,414.66 km) |
| South Portland to Green River (Wyoming) | 1,980.47 mi (3,187.26 km) |
| South Portland to Green Valley (Arizona) | 2,341.66 mi (3,768.55 km) |
| South Portland to Green Valley (Maryland) | 465.82 mi (749.67 km) |
| South Portland to Greenacres (Florida) | 1,297.70 mi (2,088.45 km) |
| South Portland to Greenbelt (Maryland) | 468.62 mi (754.17 km) |
| South Portland to Greendale (Wisconsin) | 890.48 mi (1,433.09 km) |
| South Portland to Greeneville (Tennessee) | 839.26 mi (1,350.67 km) |
