| Porsgrunn to March | 586.31 mi (943.57 km) |
| Porsgrunn to Margate | 625.71 mi (1,006.98 km) |
| Porsgrunn to Market Drayton | 635.47 mi (1,022.70 km) |
| Porsgrunn to Market Harborough | 615.69 mi (990.85 km) |
| Porsgrunn to Marlow | 663.01 mi (1,067.00 km) |
| Porsgrunn to Marple | 598.67 mi (963.47 km) |
| Porsgrunn to Marton | 518.90 mi (835.09 km) |
| Porsgrunn to Maryport | 582.03 mi (936.69 km) |
| Porsgrunn to Matlock | 597.29 mi (961.25 km) |
| Porsgrunn to Melksham | 707.96 mi (1,139.35 km) |
| Porsgrunn to Meltham | 582.97 mi (938.20 km) |
| Porsgrunn to Melton Mowbray | 599.12 mi (964.20 km) |
| Porsgrunn to Merthyr Tudful | 720.65 mi (1,159.78 km) |
| Porsgrunn to Methil | 511.41 mi (823.04 km) |
| Porsgrunn to Mexborough | 571.53 mi (919.78 km) |
