| Sleaford to Curtea de Arges | 1,250.20 mi (2,012.00 km) |
| Sleaford to Dabuleni | 1,281.98 mi (2,063.15 km) |
| Sleaford to Darabani | 1,221.98 mi (1,966.59 km) |
| Sleaford to Darmanesti | 1,277.16 mi (2,055.39 km) |
| Sleaford to Dej | 1,142.82 mi (1,839.20 km) |
| Sleaford to Deva | 1,150.83 mi (1,852.09 km) |
| Sleaford to Dolhasca | 1,246.50 mi (2,006.05 km) |
| Sleaford to Dorohoi | 1,221.06 mi (1,965.11 km) |
| Sleaford to Draganesti-Olt | 1,283.61 mi (2,065.76 km) |
| Sleaford to Dragasani | 1,252.66 mi (2,015.97 km) |
| Sleaford to Drobeta-Turnu Severin | 1,190.32 mi (1,915.64 km) |
| Sleaford to Fagaras | 1,234.99 mi (1,987.52 km) |
| Sleaford to Falticeni | 1,232.78 mi (1,983.97 km) |
| Sleaford to Fetesti | 1,405.35 mi (2,261.69 km) |
| Sleaford to Filiasi | 1,234.20 mi (1,986.25 km) |
