| Porsgrunn to Marsala | 1,477.88 mi (2,378.42 km) |
| Porsgrunn to Marsciano | 1,124.81 mi (1,810.21 km) |
| Porsgrunn to Martano | 1,359.63 mi (2,188.11 km) |
| Porsgrunn to Martellago | 943.04 mi (1,517.67 km) |
| Porsgrunn to Martina Franca | 1,314.81 mi (2,115.99 km) |
| Porsgrunn to Martinengo | 935.89 mi (1,506.16 km) |
| Porsgrunn to Martinsicuro | 1,135.81 mi (1,827.90 km) |
| Porsgrunn to Mascali | 1,496.32 mi (2,408.09 km) |
| Porsgrunn to Mascalucia | 1,507.80 mi (2,426.57 km) |
| Porsgrunn to Masera di Padova | 957.65 mi (1,541.18 km) |
| Porsgrunn to Maserada sul Piave | 929.80 mi (1,496.37 km) |
| Porsgrunn to Massa | 1,042.24 mi (1,677.32 km) |
| Porsgrunn to Massa Lombarda | 1,017.16 mi (1,636.96 km) |
| Porsgrunn to Massafra | 1,320.37 mi (2,124.93 km) |
| Porsgrunn to Massalubrense | 1,293.99 mi (2,082.47 km) |
