| Sleaford to Civril | 1,754.50 mi (2,823.60 km) |
| Sleaford to Cizre | 2,295.33 mi (3,693.98 km) |
| Sleaford to Cobanlar | 1,775.30 mi (2,857.08 km) |
| Sleaford to Corlu | 1,544.42 mi (2,485.50 km) |
| Sleaford to Corum | 1,856.23 mi (2,987.32 km) |
| Sleaford to Cukurca | 2,357.62 mi (3,794.23 km) |
| Sleaford to Cukurcayir | 2,033.32 mi (3,272.31 km) |
| Sleaford to Cumayeri | 1,680.91 mi (2,705.17 km) |
| Sleaford to Cumra | 1,907.11 mi (3,069.19 km) |
| Sleaford to Cungus | 2,136.66 mi (3,438.62 km) |
| Sleaford to Dargecit | 2,266.48 mi (3,647.54 km) |
| Sleaford to Davutlar | 1,691.21 mi (2,721.74 km) |
| Sleaford to Demirozu | 2,074.30 mi (3,338.27 km) |
| Sleaford to Demre | 1,866.79 mi (3,004.31 km) |
| Sleaford to Denizciler | 2,087.09 mi (3,358.84 km) |
