| Sleaford to Amelia | 932.98 mi (1,501.49 km) |
| Sleaford to Anagni | 1,000.50 mi (1,610.15 km) |
| Sleaford to Ancona | 907.89 mi (1,461.10 km) |
| Sleaford to Andria | 1,126.07 mi (1,812.23 km) |
| Sleaford to Angri | 1,099.39 mi (1,769.29 km) |
| Sleaford to Anguillara Sabazia | 955.33 mi (1,537.46 km) |
| Sleaford to Anzio | 1,002.31 mi (1,613.07 km) |
| Sleaford to Anzola dell'Emilia | 785.61 mi (1,264.31 km) |
| Sleaford to Aosta | 609.80 mi (981.37 km) |
| Sleaford to Apricena | 1,068.49 mi (1,719.57 km) |
| Sleaford to Aprilia | 995.04 mi (1,601.36 km) |
| Sleaford to Aradeo | 1,244.29 mi (2,002.49 km) |
| Sleaford to Aragona | 1,270.71 mi (2,045.00 km) |
| Sleaford to Arco | 703.20 mi (1,131.70 km) |
| Sleaford to Arcola | 772.22 mi (1,242.76 km) |
