| Sleaford to Nowy Dwor Mazowiecki | 882.05 mi (1,419.52 km) |
| Sleaford to Nowy Sacz | 937.28 mi (1,508.41 km) |
| Sleaford to Nowy Targ | 913.39 mi (1,469.96 km) |
| Sleaford to Nowy Tomysl | 693.52 mi (1,116.11 km) |
| Sleaford to Nysa | 777.00 mi (1,250.46 km) |
| Sleaford to Oborniki | 718.03 mi (1,155.56 km) |
| Sleaford to Oborniki Slaskie | 741.53 mi (1,193.38 km) |
| Sleaford to Olawa | 765.35 mi (1,231.71 km) |
| Sleaford to Olecko | 939.94 mi (1,512.69 km) |
| Sleaford to Olesnica | 763.43 mi (1,228.63 km) |
| Sleaford to Olesno | 812.94 mi (1,308.29 km) |
| Sleaford to Olkusz | 873.89 mi (1,406.40 km) |
| Sleaford to Olsztyn | 859.49 mi (1,383.22 km) |
| Sleaford to Opalenica | 705.27 mi (1,135.03 km) |
| Sleaford to Opoczno | 880.83 mi (1,417.55 km) |
