| Porsgrunn to Lastra a Signa | 1,062.14 mi (1,709.34 km) |
| Porsgrunn to Laterza | 1,313.69 mi (2,114.18 km) |
| Porsgrunn to Latiano | 1,330.35 mi (2,140.99 km) |
| Porsgrunn to Latina | 1,227.16 mi (1,974.93 km) |
| Porsgrunn to Latisana | 931.97 mi (1,499.86 km) |
| Porsgrunn to Lauria Inferiore | 1,344.21 mi (2,163.30 km) |
| Porsgrunn to Lavagna | 1,022.63 mi (1,645.76 km) |
| Porsgrunn to Lavello | 1,275.81 mi (2,053.21 km) |
| Porsgrunn to Laveno-Mombello | 913.61 mi (1,470.32 km) |
| Porsgrunn to Lavis | 898.88 mi (1,446.60 km) |
| Porsgrunn to Lecce | 1,347.94 mi (2,169.30 km) |
| Porsgrunn to Lecco | 916.65 mi (1,475.21 km) |
| Porsgrunn to Legnago | 964.29 mi (1,551.87 km) |
| Porsgrunn to Legnano | 935.93 mi (1,506.23 km) |
| Porsgrunn to Legnaro | 955.75 mi (1,538.14 km) |
