| Sleaford to Ianca | 1,363.21 mi (2,193.87 km) |
| Sleaford to Iasi | 1,295.70 mi (2,085.23 km) |
| Sleaford to Iernut | 1,182.58 mi (1,903.17 km) |
| Sleaford to Ineu | 1,086.95 mi (1,749.28 km) |
| Sleaford to Jibou | 1,114.03 mi (1,792.85 km) |
| Sleaford to Jilava | 1,338.43 mi (2,154.00 km) |
| Sleaford to Jimbolia | 1,067.86 mi (1,718.55 km) |
| Sleaford to Liesti | 1,347.75 mi (2,168.99 km) |
| Sleaford to Lipova | 1,093.85 mi (1,760.38 km) |
| Sleaford to Liteni | 1,240.41 mi (1,996.24 km) |
| Sleaford to Ludus | 1,176.14 mi (1,892.81 km) |
| Sleaford to Lugoj | 1,118.20 mi (1,799.56 km) |
| Sleaford to Lupeni | 1,183.95 mi (1,905.38 km) |
| Sleaford to Magurele | 1,335.82 mi (2,149.80 km) |
| Sleaford to Mangalia | 1,459.99 mi (2,349.63 km) |
