| Porsgrunn to Lichtenau | 520.28 mi (837.31 km) |
| Porsgrunn to Lichtenfels | 622.84 mi (1,002.36 km) |
| Porsgrunn to Lichtenstein | 588.95 mi (947.82 km) |
| Porsgrunn to Lienen | 486.24 mi (782.53 km) |
| Porsgrunn to Limbach-Oberfrohna | 582.39 mi (937.26 km) |
| Porsgrunn to Limburg | 606.84 mi (976.62 km) |
| Porsgrunn to Limburgerhof | 671.82 mi (1,081.19 km) |
| Porsgrunn to Lindau | 799.40 mi (1,286.50 km) |
| Porsgrunn to Lindenberg im Allgau | 795.69 mi (1,280.54 km) |
| Porsgrunn to Lindlar | 567.01 mi (912.52 km) |
| Porsgrunn to Lingen | 464.75 mi (747.94 km) |
| Porsgrunn to Linkenheim-Hochstetten | 692.18 mi (1,113.95 km) |
| Porsgrunn to Linnich | 578.27 mi (930.64 km) |
| Porsgrunn to Lippstadt | 517.40 mi (832.68 km) |
| Porsgrunn to Lobau | 587.43 mi (945.37 km) |
