| Porsgrunn to Menges | 917.25 mi (1,476.17 km) |
| Porsgrunn to Metlika | 959.05 mi (1,543.44 km) |
| Porsgrunn to Mezica | 895.69 mi (1,441.47 km) |
| Porsgrunn to Miklavz na Dravskem Polju | 905.57 mi (1,457.37 km) |
| Porsgrunn to Miren | 927.56 mi (1,492.77 km) |
| Porsgrunn to Mirna | 936.52 mi (1,507.18 km) |
| Porsgrunn to Mirna Pec | 942.79 mi (1,517.27 km) |
| Porsgrunn to Mislinja | 904.33 mi (1,455.37 km) |
| Porsgrunn to Mokronog | 937.67 mi (1,509.04 km) |
| Porsgrunn to Moravce | 920.70 mi (1,481.72 km) |
| Porsgrunn to Moravske-Toplice | 899.26 mi (1,447.22 km) |
| Porsgrunn to Mozirje | 909.04 mi (1,462.96 km) |
| Porsgrunn to Murska Sobota | 900.25 mi (1,448.81 km) |
| Porsgrunn to Muta | 892.35 mi (1,436.09 km) |
| Porsgrunn to Naklo | 907.41 mi (1,460.33 km) |
