| Porsgrunn to Melzo | 940.83 mi (1,514.11 km) |
| Porsgrunn to Mendicino | 1,401.03 mi (2,254.75 km) |
| Porsgrunn to Menfi | 1,493.13 mi (2,402.96 km) |
| Porsgrunn to Mentana | 1,188.16 mi (1,912.16 km) |
| Porsgrunn to Merano | 862.00 mi (1,387.26 km) |
| Porsgrunn to Merate | 927.00 mi (1,491.86 km) |
| Porsgrunn to Mercato San Severino | 1,285.54 mi (2,068.88 km) |
| Porsgrunn to Mercogliano | 1,275.80 mi (2,053.21 km) |
| Porsgrunn to Mesagne | 1,329.05 mi (2,138.90 km) |
| Porsgrunn to Messina | 1,468.64 mi (2,363.55 km) |
| Porsgrunn to Mestre | 947.26 mi (1,524.47 km) |
| Porsgrunn to Mestrino | 948.08 mi (1,525.79 km) |
| Porsgrunn to Milan | 943.28 mi (1,518.07 km) |
| Porsgrunn to Milazzo | 1,464.62 mi (2,357.08 km) |
| Porsgrunn to Minerbio | 1,004.45 mi (1,616.50 km) |
