| South Portland to Garfield (New Jersey) | 272.51 mi (438.57 km) |
| South Portland to Garfield Heights (Ohio) | 595.50 mi (958.37 km) |
| South Portland to Garland (Texas) | 1,599.77 mi (2,574.59 km) |
| South Portland to Garner (North Carolina) | 704.21 mi (1,133.31 km) |
| South Portland to Gary (Indiana) | 877.17 mi (1,411.66 km) |
| South Portland to Gastonia (North Carolina) | 819.24 mi (1,318.45 km) |
| South Portland to Gatesville (Texas) | 1,711.59 mi (2,754.53 km) |
| South Portland to Gateway (Florida) | 1,341.32 mi (2,158.64 km) |
| South Portland to Gautier (Mississippi) | 1,358.47 mi (2,186.25 km) |
| South Portland to Geneva (Illinois) | 920.99 mi (1,482.19 km) |
| South Portland to Geneva (New York) | 340.89 mi (548.60 km) |
| South Portland to Georgetown (Georgia) | 1,000.02 mi (1,609.38 km) |
| South Portland to Georgetown (Kentucky) | 831.29 mi (1,337.83 km) |
| South Portland to Georgetown (Texas) | 1,743.00 mi (2,805.09 km) |
| South Portland to Germantown (Maryland) | 474.49 mi (763.61 km) |
