| Porsgrunn to Mombris | 625.59 mi (1,006.79 km) |
| Porsgrunn to Monchengladbach | 561.83 mi (904.18 km) |
| Porsgrunn to Monschau | 606.69 mi (976.37 km) |
| Porsgrunn to Montabaur | 604.22 mi (972.40 km) |
| Porsgrunn to Moosburg | 741.24 mi (1,192.90 km) |
| Porsgrunn to Morbach | 650.75 mi (1,047.28 km) |
| Porsgrunn to Morfelden-Walldorf | 631.42 mi (1,016.17 km) |
| Porsgrunn to Morlenbach | 658.68 mi (1,060.04 km) |
| Porsgrunn to Morsbach | 575.33 mi (925.90 km) |
| Porsgrunn to Mosbach | 674.96 mi (1,086.25 km) |
| Porsgrunn to Mosigkau | 512.67 mi (825.07 km) |
| Porsgrunn to Mossingen | 740.40 mi (1,191.57 km) |
| Porsgrunn to Much | 573.74 mi (923.35 km) |
| Porsgrunn to Mucheln | 546.19 mi (879.00 km) |
| Porsgrunn to Muhlacker | 703.25 mi (1,131.77 km) |
