| South Portland to Glenvar Heights (Florida) | 1,360.59 mi (2,189.66 km) |
| South Portland to Glenview (Illinois) | 892.71 mi (1,436.67 km) |
| South Portland to Gloucester (Massachusetts) | 72.31 mi (116.37 km) |
| South Portland to Gloucester City (New Jersey) | 358.53 mi (576.99 km) |
| South Portland to Gloucester Point (Virginia) | 546.92 mi (880.19 km) |
| South Portland to Gloversville (New York) | 207.77 mi (334.38 km) |
| South Portland to Godfrey (Illinois) | 1,080.54 mi (1,738.95 km) |
| South Portland to Gold Canyon (Arizona) | 2,308.20 mi (3,714.68 km) |
| South Portland to Golden (Colorado) | 1,808.30 mi (2,910.18 km) |
| South Portland to Golden Gate (Florida) | 1,364.87 mi (2,196.55 km) |
| South Portland to Golden Glades (Florida) | 1,344.87 mi (2,164.35 km) |
| South Portland to Golden Valley (Minnesota) | 1,140.56 mi (1,835.55 km) |
| South Portland to Goldenrod (Florida) | 1,203.31 mi (1,936.54 km) |
| South Portland to Goldsboro (North Carolina) | 701.37 mi (1,128.74 km) |
| South Portland to Goleta (California) | 2,693.47 mi (4,334.72 km) |
