| Sleaford to Oerlinghausen | 388.35 mi (624.99 km) |
| Sleaford to Oestrich-Winkel | 416.52 mi (670.32 km) |
| Sleaford to Offenburg | 480.25 mi (772.89 km) |
| Sleaford to Oftersheim | 462.74 mi (744.71 km) |
| Sleaford to Ohrdruf | 497.50 mi (800.66 km) |
| Sleaford to Ohringen | 503.13 mi (809.71 km) |
| Sleaford to Olbernhau | 607.54 mi (977.74 km) |
| Sleaford to Olching | 610.78 mi (982.96 km) |
| Sleaford to Oldenburg | 358.07 mi (576.25 km) |
| Sleaford to Oldenburg in Holstein | 470.79 mi (757.66 km) |
| Sleaford to Olfen | 340.47 mi (547.93 km) |
| Sleaford to Olpe | 376.18 mi (605.40 km) |
| Sleaford to Olsberg | 393.45 mi (633.19 km) |
| Sleaford to Oranienburg | 568.61 mi (915.08 km) |
| Sleaford to Ortenberg | 444.35 mi (715.11 km) |
