| Porsgrunn to Masquefa | 1,263.69 mi (2,033.71 km) |
| Porsgrunn to Matadepera | 1,254.53 mi (2,018.97 km) |
| Porsgrunn to Mazarron | 1,565.71 mi (2,519.76 km) |
| Porsgrunn to Meco | 1,402.12 mi (2,256.50 km) |
| Porsgrunn to Medina del Campo | 1,383.53 mi (2,226.58 km) |
| Porsgrunn to Medina Sidonia | 1,714.97 mi (2,759.97 km) |
| Porsgrunn to Mejorada del Campo | 1,413.41 mi (2,274.66 km) |
| Porsgrunn to Meliana | 1,423.55 mi (2,290.99 km) |
| Porsgrunn to Mengibar | 1,579.61 mi (2,542.13 km) |
| Porsgrunn to Merida | 1,565.31 mi (2,519.13 km) |
| Porsgrunn to Miajadas | 1,543.99 mi (2,484.81 km) |
| Porsgrunn to Mieres | 1,278.08 mi (2,056.88 km) |
| Porsgrunn to Miguelturra | 1,516.58 mi (2,440.71 km) |
| Porsgrunn to Mijas | 1,683.52 mi (2,709.36 km) |
| Porsgrunn to Miranda de Ebro | 1,257.08 mi (2,023.08 km) |
