| Barreiro to Mitcham | 979.94 mi (1,577.07 km) |
| Barreiro to Mold | 1,040.72 mi (1,674.88 km) |
| Barreiro to Molesey | 975.49 mi (1,569.91 km) |
| Barreiro to Monkseaton | 1,185.53 mi (1,907.93 km) |
| Barreiro to Monmouth | 958.26 mi (1,542.18 km) |
| Barreiro to Montrose | 1,282.34 mi (2,063.73 km) |
| Barreiro to Morden | 979.06 mi (1,575.65 km) |
| Barreiro to Morecambe | 1,103.66 mi (1,776.16 km) |
| Barreiro to Moreton | 1,056.44 mi (1,700.18 km) |
| Barreiro to Morley | 1,100.05 mi (1,770.36 km) |
| Barreiro to Morpeth | 1,190.45 mi (1,915.84 km) |
| Barreiro to Morriston | 931.58 mi (1,499.23 km) |
| Barreiro to Mosbrough | 1,076.68 mi (1,732.76 km) |
| Barreiro to Mossley | 1,078.47 mi (1,735.63 km) |
| Barreiro to Moston | 1,076.42 mi (1,732.33 km) |
