| Sleaford to Mexborough | 50.02 mi (80.51 km) |
| Sleaford to Mickleover | 47.87 mi (77.04 km) |
| Sleaford to Middlesbrough | 114.26 mi (183.88 km) |
| Sleaford to Middleton | 82.84 mi (133.33 km) |
| Sleaford to Middlewich | 85.31 mi (137.29 km) |
| Sleaford to Midsomer Norton | 147.24 mi (236.96 km) |
| Sleaford to Mildenhall | 59.31 mi (95.45 km) |
| Sleaford to Milford Haven | 214.46 mi (345.13 km) |
| Sleaford to Mill Hill | 95.39 mi (153.51 km) |
| Sleaford to Milngavie | 256.75 mi (413.21 km) |
| Sleaford to Milnrow | 81.95 mi (131.88 km) |
| Sleaford to Milton | 71.95 mi (115.79 km) |
| Sleaford to Milton Keynes | 67.64 mi (108.86 km) |
| Sleaford to Minehead | 179.44 mi (288.78 km) |
| Sleaford to Minster | 120.49 mi (193.91 km) |
