| Portchester to Mexborough | 183.72 mi (295.68 km) |
| Portchester to Mickleover | 143.45 mi (230.86 km) |
| Portchester to Middlesbrough | 258.09 mi (415.35 km) |
| Portchester to Middleton | 192.81 mi (310.30 km) |
| Portchester to Middlewich | 171.83 mi (276.54 km) |
| Portchester to Midsomer Norton | 66.55 mi (107.11 km) |
| Portchester to Mildenhall | 125.16 mi (201.43 km) |
| Portchester to Milford Haven | 179.91 mi (289.53 km) |
| Portchester to Mill Hill | 66.12 mi (106.41 km) |
| Portchester to Milngavie | 376.05 mi (605.19 km) |
| Portchester to Milnrow | 195.80 mi (315.11 km) |
| Portchester to Milton | 158.64 mi (255.31 km) |
| Portchester to Milton Keynes | 84.21 mi (135.53 km) |
| Portchester to Minehead | 105.30 mi (169.47 km) |
| Portchester to Minster | 92.71 mi (149.20 km) |
