| Barreiro to Mickleover | 1,046.64 mi (1,684.40 km) |
| Barreiro to Middlesbrough | 1,158.67 mi (1,864.69 km) |
| Barreiro to Middleton | 1,078.94 mi (1,736.39 km) |
| Barreiro to Middlewich | 1,051.76 mi (1,692.64 km) |
| Barreiro to Midsomer Norton | 928.37 mi (1,494.06 km) |
| Barreiro to Mildenhall | 1,050.55 mi (1,690.70 km) |
| Barreiro to Milford Haven | 922.17 mi (1,484.10 km) |
| Barreiro to Mill Hill | 991.50 mi (1,595.67 km) |
| Barreiro to Milngavie | 1,213.50 mi (1,952.94 km) |
| Barreiro to Milnrow | 1,083.59 mi (1,743.87 km) |
| Barreiro to Milton | 1,046.96 mi (1,684.92 km) |
| Barreiro to Milton Keynes | 1,006.62 mi (1,620.01 km) |
| Barreiro to Minehead | 907.72 mi (1,460.84 km) |
| Barreiro to Minster | 1,002.43 mi (1,613.26 km) |
| Barreiro to Mirfield | 1,094.35 mi (1,761.18 km) |
