| Castelo Branco to Mitcham | 874.59 mi (1,407.52 km) |
| Castelo Branco to Mold | 945.00 mi (1,520.82 km) |
| Castelo Branco to Molesey | 870.56 mi (1,401.03 km) |
| Castelo Branco to Monkseaton | 1,088.26 mi (1,751.39 km) |
| Castelo Branco to Monmouth | 859.56 mi (1,383.32 km) |
| Castelo Branco to Montrose | 1,189.02 mi (1,913.55 km) |
| Castelo Branco to Morden | 873.79 mi (1,406.24 km) |
| Castelo Branco to Morecambe | 1,008.39 mi (1,622.84 km) |
| Castelo Branco to Moreton | 960.96 mi (1,546.51 km) |
| Castelo Branco to Morley | 1,001.40 mi (1,611.60 km) |
| Castelo Branco to Morpeth | 1,093.82 mi (1,760.34 km) |
| Castelo Branco to Morriston | 836.17 mi (1,345.68 km) |
| Castelo Branco to Mosbrough | 976.91 mi (1,572.18 km) |
| Castelo Branco to Mossley | 980.50 mi (1,577.96 km) |
| Castelo Branco to Moston | 978.79 mi (1,575.21 km) |
