| Sleaford to Karditsa | 1,413.29 mi (2,274.46 km) |
| Sleaford to Kastoria | 1,331.01 mi (2,142.06 km) |
| Sleaford to Katerini | 1,387.72 mi (2,233.33 km) |
| Sleaford to Keratsini | 1,546.39 mi (2,488.68 km) |
| Sleaford to Kerkyra | 1,331.14 mi (2,142.26 km) |
| Sleaford to Kiato | 1,513.89 mi (2,436.38 km) |
| Sleaford to Kifisia | 1,547.27 mi (2,490.10 km) |
| Sleaford to Kilkis | 1,365.35 mi (2,197.32 km) |
| Sleaford to Komotini | 1,455.04 mi (2,341.66 km) |
| Sleaford to Korinthos | 1,523.87 mi (2,452.43 km) |
| Sleaford to Koropi | 1,558.93 mi (2,508.85 km) |
| Sleaford to Korydallos | 1,546.68 mi (2,489.15 km) |
| Sleaford to Kos | 1,734.24 mi (2,790.99 km) |
| Sleaford to Kozani | 1,360.40 mi (2,189.35 km) |
| Sleaford to Lagos | 1,441.77 mi (2,320.30 km) |
