| Sleaford to Oswego (Illinois) | 3,925.47 mi (6,317.44 km) |
| Sleaford to Oswego (New York) | 3,394.89 mi (5,463.54 km) |
| Sleaford to Otsego (Minnesota) | 3,943.18 mi (6,345.94 km) |
| Sleaford to Ottawa (Illinois) | 3,959.40 mi (6,372.04 km) |
| Sleaford to Ottawa (Kansas) | 4,333.05 mi (6,973.37 km) |
| Sleaford to Ottumwa (Iowa) | 4,107.84 mi (6,610.93 km) |
| Sleaford to Overland (Missouri) | 4,147.25 mi (6,674.35 km) |
| Sleaford to Overland Park (Kansas) | 4,297.40 mi (6,916.00 km) |
| Sleaford to Overlea (Maryland) | 3,579.81 mi (5,761.15 km) |
| Sleaford to Oviedo (Florida) | 4,291.88 mi (6,907.12 km) |
| Sleaford to Owasso (Oklahoma) | 4,472.64 mi (7,198.01 km) |
| Sleaford to Owatonna (Minnesota) | 3,986.42 mi (6,415.52 km) |
| Sleaford to Owensboro (Kentucky) | 4,070.43 mi (6,550.73 km) |
| Sleaford to Owings Mills (Maryland) | 3,588.49 mi (5,775.11 km) |
| Sleaford to Owosso (Michigan) | 3,708.32 mi (5,967.96 km) |
