| Porsgrunn to Ittiri | 1,280.27 mi (2,060.40 km) |
| Porsgrunn to Ivrea | 946.09 mi (1,522.59 km) |
| Porsgrunn to L'Aquila | 1,169.14 mi (1,881.54 km) |
| Porsgrunn to La Loggia | 981.94 mi (1,580.29 km) |
| Porsgrunn to La Maddalena | 1,236.77 mi (1,990.38 km) |
| Porsgrunn to La Spezia | 1,037.49 mi (1,669.67 km) |
| Porsgrunn to Lacchiarella | 953.13 mi (1,533.92 km) |
| Porsgrunn to Ladispoli | 1,190.08 mi (1,915.24 km) |
| Porsgrunn to Lainate | 936.56 mi (1,507.25 km) |
| Porsgrunn to Laives | 879.55 mi (1,415.49 km) |
| Porsgrunn to Lana | 865.66 mi (1,393.14 km) |
| Porsgrunn to Lanciano | 1,183.56 mi (1,904.75 km) |
| Porsgrunn to Langhirano | 1,002.05 mi (1,612.64 km) |
| Porsgrunn to Lanuvio | 1,211.33 mi (1,949.45 km) |
| Porsgrunn to Lariano | 1,208.52 mi (1,944.92 km) |
