| Portsmouth to Gavardo | 640.58 mi (1,030.91 km) |
| Portsmouth to Gavirate | 564.98 mi (909.24 km) |
| Portsmouth to Gavorrano | 784.11 mi (1,261.91 km) |
| Portsmouth to Gela | 1,212.92 mi (1,952.01 km) |
| Portsmouth to Gemona del Friuli | 720.05 mi (1,158.82 km) |
| Portsmouth to Genoa | 641.66 mi (1,032.66 km) |
| Portsmouth to Genzano di Roma | 907.77 mi (1,460.91 km) |
| Portsmouth to Gessate | 604.70 mi (973.17 km) |
| Portsmouth to Ghedi | 642.67 mi (1,034.28 km) |
| Portsmouth to Giarre | 1,204.50 mi (1,938.46 km) |
| Portsmouth to Giaveno | 557.24 mi (896.79 km) |
| Portsmouth to Giffoni Valle Piana | 1,036.27 mi (1,667.72 km) |
| Portsmouth to Ginosa | 1,112.56 mi (1,790.50 km) |
| Portsmouth to Gioia del Colle | 1,104.61 mi (1,777.69 km) |
| Portsmouth to Gioia Tauro | 1,189.76 mi (1,914.73 km) |
