| South Portland to Gaffney (South Carolina) | 845.99 mi (1,361.50 km) |
| South Portland to Gages Lake (Illinois) | 896.83 mi (1,443.32 km) |
| South Portland to Gahanna (Ohio) | 692.79 mi (1,114.93 km) |
| South Portland to Gainesville (Florida) | 1,170.13 mi (1,883.14 km) |
| South Portland to Gainesville (Georgia) | 970.17 mi (1,561.34 km) |
| South Portland to Gainesville (Texas) | 1,596.03 mi (2,568.57 km) |
| South Portland to Gainesville (Virginia) | 507.07 mi (816.05 km) |
| South Portland to Gaithersburg (Maryland) | 474.40 mi (763.48 km) |
| South Portland to Galena Park (Texas) | 1,671.70 mi (2,690.34 km) |
| South Portland to Galesburg (Illinois) | 1,040.55 mi (1,674.60 km) |
| South Portland to Galion (Ohio) | 669.17 mi (1,076.92 km) |
| South Portland to Gallatin (Tennessee) | 989.63 mi (1,592.66 km) |
| South Portland to Gallup (New Mexico) | 2,102.74 mi (3,384.04 km) |
| South Portland to Galt (California) | 2,645.48 mi (4,257.49 km) |
| South Portland to Galveston (Texas) | 1,679.66 mi (2,703.15 km) |
