| Porsgrunn to Marghita | 962.58 mi (1,549.13 km) |
| Porsgrunn to Marginea | 1,018.90 mi (1,639.76 km) |
| Porsgrunn to Matca | 1,176.59 mi (1,893.54 km) |
| Porsgrunn to Medgidia | 1,289.37 mi (2,075.05 km) |
| Porsgrunn to Media | 1,080.84 mi (1,739.45 km) |
| Porsgrunn to Miercurea-Ciuc | 1,102.95 mi (1,775.02 km) |
| Porsgrunn to Mioveni | 1,166.99 mi (1,878.09 km) |
| Porsgrunn to Mizil | 1,199.56 mi (1,930.51 km) |
| Porsgrunn to Moinesti | 1,115.66 mi (1,795.47 km) |
| Porsgrunn to Moisei | 995.45 mi (1,602.03 km) |
| Porsgrunn to Moldova Noua | 1,113.77 mi (1,792.45 km) |
| Porsgrunn to Moreni | 1,181.80 mi (1,901.92 km) |
| Porsgrunn to Motru | 1,133.99 mi (1,824.98 km) |
| Porsgrunn to Murfatlar | 1,297.65 mi (2,088.36 km) |
| Porsgrunn to Nasaud | 1,014.24 mi (1,632.27 km) |
