| Porsgrunn to Montevarchi | 1,079.84 mi (1,737.84 km) |
| Porsgrunn to Monticello Conte Otto | 937.08 mi (1,508.09 km) |
| Porsgrunn to Montichiari | 946.97 mi (1,524.00 km) |
| Porsgrunn to Montignoso | 1,043.41 mi (1,679.21 km) |
| Porsgrunn to Montopoli in Val d'Arno | 1,068.32 mi (1,719.30 km) |
| Porsgrunn to Monza | 935.15 mi (1,504.97 km) |
| Porsgrunn to Morbegno | 897.01 mi (1,443.60 km) |
| Porsgrunn to Mori | 918.09 mi (1,477.52 km) |
| Porsgrunn to Morlupo | 1,178.78 mi (1,897.07 km) |
| Porsgrunn to Morrovalle | 1,103.93 mi (1,776.61 km) |
| Porsgrunn to Mortara | 958.86 mi (1,543.13 km) |
| Porsgrunn to Mosciano Sant'Angelo | 1,144.71 mi (1,842.24 km) |
| Porsgrunn to Motta di Livenza | 929.25 mi (1,495.48 km) |
| Porsgrunn to Motta Sant'Anastasia | 1,511.79 mi (2,432.99 km) |
| Porsgrunn to Mottola | 1,316.11 mi (2,118.07 km) |
