| Porsgrunn to Mechernich | 600.66 mi (966.67 km) |
| Porsgrunn to Meckenbeuren | 788.76 mi (1,269.39 km) |
| Porsgrunn to Meckenheim | 595.64 mi (958.60 km) |
| Porsgrunn to Meerane | 581.18 mi (935.32 km) |
| Porsgrunn to Meerbusch | 555.28 mi (893.64 km) |
| Porsgrunn to Meine | 466.25 mi (750.35 km) |
| Porsgrunn to Meinerzhagen | 558.66 mi (899.07 km) |
| Porsgrunn to Meiningen | 592.48 mi (953.51 km) |
| Porsgrunn to Meissen | 568.84 mi (915.46 km) |
| Porsgrunn to Meitingen | 732.57 mi (1,178.96 km) |
| Porsgrunn to Melle | 480.47 mi (773.24 km) |
| Porsgrunn to Melsungen | 551.56 mi (887.65 km) |
| Porsgrunn to Memmelsdorf | 636.40 mi (1,024.18 km) |
| Porsgrunn to Memmingen | 769.09 mi (1,237.74 km) |
| Porsgrunn to Mendig | 611.57 mi (984.23 km) |
