| Sleaford to Nyon | 544.47 mi (876.23 km) |
| Sleaford to Oberriet | 589.93 mi (949.40 km) |
| Sleaford to Obersiggenthal | 540.45 mi (869.76 km) |
| Sleaford to Oberwil | 516.49 mi (831.21 km) |
| Sleaford to Oberwingert | 554.03 mi (891.63 km) |
| Sleaford to Oftringen | 537.79 mi (865.48 km) |
| Sleaford to Olten | 535.52 mi (861.84 km) |
| Sleaford to Onex | 553.26 mi (890.39 km) |
| Sleaford to Opfikon | 551.82 mi (888.06 km) |
| Sleaford to Ostermundigen | 544.80 mi (876.76 km) |
| Sleaford to Payerne | 537.14 mi (864.45 km) |
| Sleaford to Pfaffikon | 562.07 mi (904.56 km) |
| Sleaford to Plan-les-Ouates | 554.66 mi (892.63 km) |
| Sleaford to Pratteln | 520.69 mi (837.97 km) |
| Sleaford to Prilly | 544.74 mi (876.67 km) |
