| Sleaford to Montalegre | 844.49 mi (1,359.08 km) |
| Sleaford to Montemor-o-Novo | 1,058.53 mi (1,703.54 km) |
| Sleaford to Montemor-o-Velho | 968.01 mi (1,557.86 km) |
| Sleaford to Montijo | 1,068.19 mi (1,719.09 km) |
| Sleaford to Mortagua | 942.41 mi (1,516.66 km) |
| Sleaford to Moura | 1,080.58 mi (1,739.03 km) |
| Sleaford to Murtosa | 930.58 mi (1,497.63 km) |
| Sleaford to Nazare | 1,011.84 mi (1,628.41 km) |
| Sleaford to Nelas | 930.12 mi (1,496.89 km) |
| Sleaford to Obidos | 1,029.19 mi (1,656.32 km) |
| Sleaford to Odemira | 1,135.62 mi (1,827.61 km) |
| Sleaford to Odivelas | 1,066.35 mi (1,716.12 km) |
| Sleaford to Oeiras | 1,075.84 mi (1,731.39 km) |
| Sleaford to Olhao | 1,160.03 mi (1,866.88 km) |
| Sleaford to Oliveira de Azemeis | 920.68 mi (1,481.69 km) |
