| Sleaford to Ames | 793.37 mi (1,276.80 km) |
| Sleaford to Amorebieta | 683.85 mi (1,100.55 km) |
| Sleaford to Amposta | 850.11 mi (1,368.13 km) |
| Sleaford to Amurrio | 697.22 mi (1,122.07 km) |
| Sleaford to Andoain | 679.68 mi (1,093.83 km) |
| Sleaford to Andraitx | 936.95 mi (1,507.88 km) |
| Sleaford to Andujar | 1,047.96 mi (1,686.53 km) |
| Sleaford to Antequera | 1,121.90 mi (1,805.53 km) |
| Sleaford to Antigua | 1,834.46 mi (2,952.27 km) |
| Sleaford to Aranda de Duero | 796.27 mi (1,281.47 km) |
| Sleaford to Aranjuez | 908.15 mi (1,461.53 km) |
| Sleaford to Archena | 1,029.05 mi (1,656.10 km) |
| Sleaford to Arcos de la Frontera | 1,152.25 mi (1,854.36 km) |
| Sleaford to Arenys de Mar | 800.59 mi (1,288.43 km) |
| Sleaford to Arenys de Munt | 798.40 mi (1,284.90 km) |
