| Thornton to Mexborough | 30.71 mi (49.43 km) |
| Thornton to Mickleover | 62.63 mi (100.80 km) |
| Thornton to Middlesbrough | 59.78 mi (96.21 km) |
| Thornton to Middleton | 21.28 mi (34.25 km) |
| Thornton to Middlewich | 47.95 mi (77.17 km) |
| Thornton to Midsomer Norton | 175.14 mi (281.86 km) |
| Thornton to Mildenhall | 139.86 mi (225.08 km) |
| Thornton to Milford Haven | 195.89 mi (315.26 km) |
| Thornton to Mill Hill | 164.54 mi (264.80 km) |
| Thornton to Milngavie | 178.04 mi (286.53 km) |
| Thornton to Milnrow | 16.37 mi (26.34 km) |
| Thornton to Milton | 52.51 mi (84.50 km) |
| Thornton to Milton Keynes | 129.15 mi (207.85 km) |
| Thornton to Minehead | 191.27 mi (307.81 km) |
| Thornton to Minster | 198.06 mi (318.74 km) |
