| Porsgrunn to Massarosa | 1,053.93 mi (1,696.13 km) |
| Porsgrunn to Matelica | 1,104.69 mi (1,777.83 km) |
| Porsgrunn to Matera | 1,309.41 mi (2,107.30 km) |
| Porsgrunn to Matino | 1,368.87 mi (2,202.98 km) |
| Porsgrunn to Mazzarino | 1,520.61 mi (2,447.18 km) |
| Porsgrunn to Meda | 929.50 mi (1,495.89 km) |
| Porsgrunn to Medesano | 992.73 mi (1,597.64 km) |
| Porsgrunn to Medicina | 1,014.22 mi (1,632.23 km) |
| Porsgrunn to Meldola | 1,039.87 mi (1,673.51 km) |
| Porsgrunn to Melegnano | 950.64 mi (1,529.91 km) |
| Porsgrunn to Melendugno | 1,355.54 mi (2,181.53 km) |
| Porsgrunn to Melfi | 1,277.88 mi (2,056.56 km) |
| Porsgrunn to Melilli | 1,534.54 mi (2,469.61 km) |
| Porsgrunn to Melito di Napoli | 1,272.65 mi (2,048.13 km) |
| Porsgrunn to Melito di Porto Salvo | 1,489.39 mi (2,396.94 km) |
