| Castelo Branco to Mickleover | 946.67 mi (1,523.52 km) |
| Castelo Branco to Middlesbrough | 1,060.34 mi (1,706.45 km) |
| Castelo Branco to Middleton | 981.37 mi (1,579.36 km) |
| Castelo Branco to Middlewich | 954.32 mi (1,535.82 km) |
| Castelo Branco to Midsomer Norton | 828.20 mi (1,332.85 km) |
| Castelo Branco to Mildenhall | 945.50 mi (1,521.63 km) |
| Castelo Branco to Milford Haven | 830.40 mi (1,336.40 km) |
| Castelo Branco to Mill Hill | 886.67 mi (1,426.96 km) |
| Castelo Branco to Milngavie | 1,123.60 mi (1,808.25 km) |
| Castelo Branco to Milnrow | 985.92 mi (1,586.68 km) |
| Castelo Branco to Milton | 948.59 mi (1,526.61 km) |
| Castelo Branco to Milton Keynes | 903.57 mi (1,454.16 km) |
| Castelo Branco to Minehead | 810.24 mi (1,303.96 km) |
| Castelo Branco to Minster | 895.35 mi (1,440.93 km) |
| Castelo Branco to Mirfield | 995.80 mi (1,602.59 km) |
