| Sleaford to Masanasa | 938.82 mi (1,510.88 km) |
| Sleaford to Masquefa | 800.78 mi (1,288.73 km) |
| Sleaford to Matadepera | 795.26 mi (1,279.84 km) |
| Sleaford to Mazarron | 1,064.76 mi (1,713.56 km) |
| Sleaford to Meco | 870.46 mi (1,400.87 km) |
| Sleaford to Medina del Campo | 834.94 mi (1,343.71 km) |
| Sleaford to Medina Sidonia | 1,172.71 mi (1,887.30 km) |
| Sleaford to Mejorada del Campo | 881.65 mi (1,418.88 km) |
| Sleaford to Meliana | 930.61 mi (1,497.67 km) |
| Sleaford to Mengibar | 1,050.96 mi (1,691.35 km) |
| Sleaford to Merida | 1,013.75 mi (1,631.48 km) |
| Sleaford to Miajadas | 993.53 mi (1,598.93 km) |
| Sleaford to Mieres | 716.83 mi (1,153.63 km) |
| Sleaford to Miguelturra | 983.78 mi (1,583.24 km) |
| Sleaford to Mijas | 1,151.09 mi (1,852.49 km) |
