| South Portland to Giovinazzo | 4,221.63 mi (6,794.05 km) |
| South Portland to Giugliano in Campania | 4,124.44 mi (6,637.65 km) |
| South Portland to Giulianova | 4,045.54 mi (6,510.67 km) |
| South Portland to Giussano | 3,740.23 mi (6,019.32 km) |
| South Portland to Goito | 3,816.74 mi (6,142.45 km) |
| South Portland to Gonzaga | 3,833.36 mi (6,169.19 km) |
| South Portland to Gorgonzola | 3,753.53 mi (6,040.73 km) |
| South Portland to Gorizia | 3,916.59 mi (6,303.15 km) |
| South Portland to Gragnano | 4,147.40 mi (6,674.59 km) |
| South Portland to Grammichele | 4,289.03 mi (6,902.52 km) |
| South Portland to Granarolo del l'Emilia | 3,874.10 mi (6,234.75 km) |
| South Portland to Gravina in Puglia | 4,225.17 mi (6,799.76 km) |
| South Portland to Grezzana | 3,822.44 mi (6,151.62 km) |
| South Portland to Gricignano d'Aversa | 4,121.32 mi (6,632.62 km) |
| South Portland to Grosseto | 3,922.05 mi (6,311.93 km) |
