| Sleaford to Alenquer | 1,046.48 mi (1,684.15 km) |
| Sleaford to Alfena | 896.13 mi (1,442.18 km) |
| Sleaford to Alijo | 874.12 mi (1,406.77 km) |
| Sleaford to Aljustrel | 1,106.01 mi (1,779.96 km) |
| Sleaford to Almada | 1,073.09 mi (1,726.97 km) |
| Sleaford to Almargem | 1,064.35 mi (1,712.91 km) |
| Sleaford to Almeirim | 1,029.46 mi (1,656.75 km) |
| Sleaford to Amadora | 1,071.04 mi (1,723.67 km) |
| Sleaford to Amarante | 885.48 mi (1,425.04 km) |
| Sleaford to Amares | 868.15 mi (1,397.15 km) |
| Sleaford to Amora | 1,075.86 mi (1,731.43 km) |
| Sleaford to Anadia | 946.10 mi (1,522.61 km) |
| Sleaford to Angra do Heroismo | 1,610.86 mi (2,592.42 km) |
| Sleaford to Ansiao | 979.56 mi (1,576.44 km) |
| Sleaford to Anta | 912.85 mi (1,469.09 km) |
