| Porsgrunn to Leopoldsburg | 579.69 mi (932.92 km) |
| Porsgrunn to Lessines | 624.90 mi (1,005.68 km) |
| Porsgrunn to Leuven | 602.04 mi (968.89 km) |
| Porsgrunn to Lichtervelde | 615.36 mi (990.33 km) |
| Porsgrunn to Liedekerke | 611.51 mi (984.13 km) |
| Porsgrunn to Liege | 608.01 mi (978.50 km) |
| Porsgrunn to Lierre | 587.34 mi (945.23 km) |
| Porsgrunn to Lille | 577.23 mi (928.96 km) |
| Porsgrunn to Lint | 589.56 mi (948.81 km) |
| Porsgrunn to Lochristi | 600.01 mi (965.62 km) |
| Porsgrunn to Lokeren | 597.77 mi (962.01 km) |
| Porsgrunn to Lommel | 571.23 mi (919.31 km) |
| Porsgrunn to Londerzeel | 599.74 mi (965.19 km) |
| Porsgrunn to Louvain-la-Neuve | 618.93 mi (996.07 km) |
| Porsgrunn to Lovendegem | 603.59 mi (971.38 km) |
