| Thornton Heath to Mirfield | 170.98 mi (275.16 km) |
| Thornton Heath to Mitcham | 1.86 mi (2.99 km) |
| Thornton Heath to Mold | 176.68 mi (284.35 km) |
| Thornton Heath to Molesey | 10.97 mi (17.65 km) |
| Thornton Heath to Monkseaton | 257.80 mi (414.90 km) |
| Thornton Heath to Monmouth | 115.58 mi (186.00 km) |
| Thornton Heath to Montrose | 378.94 mi (609.85 km) |
| Thornton Heath to Morden | 3.72 mi (5.99 km) |
| Thornton Heath to Morecambe | 217.79 mi (350.50 km) |
| Thornton Heath to Moreton | 187.40 mi (301.59 km) |
| Thornton Heath to Morley | 173.99 mi (280.01 km) |
| Thornton Heath to Morpeth | 268.36 mi (431.88 km) |
| Thornton Heath to Morriston | 165.62 mi (266.54 km) |
| Thornton Heath to Mosbrough | 143.11 mi (230.32 km) |
| Thornton Heath to Mossley | 167.16 mi (269.02 km) |
