| Porsgrunn to Grottaferrata | 1,203.98 mi (1,937.61 km) |
| Porsgrunn to Grottaglie | 1,327.17 mi (2,135.88 km) |
| Porsgrunn to Grottammare | 1,128.18 mi (1,815.63 km) |
| Porsgrunn to Grugliasco | 974.68 mi (1,568.60 km) |
| Porsgrunn to Grumo Appula | 1,286.69 mi (2,070.73 km) |
| Porsgrunn to Grumo Nevano | 1,271.73 mi (2,046.66 km) |
| Porsgrunn to Gualdo Tadino | 1,105.11 mi (1,778.51 km) |
| Porsgrunn to Guardiagrele | 1,184.65 mi (1,906.50 km) |
| Porsgrunn to Guastalla | 981.87 mi (1,580.16 km) |
| Porsgrunn to Gubbio | 1,096.04 mi (1,763.90 km) |
| Porsgrunn to Guspini | 1,353.83 mi (2,178.78 km) |
| Porsgrunn to Gussago | 934.02 mi (1,503.15 km) |
| Porsgrunn to Iesi | 1,087.65 mi (1,750.40 km) |
| Porsgrunn to Iesolo | 946.38 mi (1,523.05 km) |
| Porsgrunn to Iglesias | 1,368.95 mi (2,203.11 km) |
