| Kempston to Oswego (Illinois) | 3,950.12 mi (6,357.11 km) |
| Kempston to Oswego (New York) | 3,414.05 mi (5,494.39 km) |
| Kempston to Otsego (Minnesota) | 3,973.75 mi (6,395.14 km) |
| Kempston to Ottawa (Illinois) | 3,984.07 mi (6,411.74 km) |
| Kempston to Ottawa (Kansas) | 4,359.49 mi (7,015.92 km) |
| Kempston to Ottumwa (Iowa) | 4,134.39 mi (6,653.65 km) |
| Kempston to Overland (Missouri) | 4,170.70 mi (6,712.10 km) |
| Kempston to Overland Park (Kansas) | 4,323.70 mi (6,958.32 km) |
| Kempston to Overlea (Maryland) | 3,594.85 mi (5,785.36 km) |
| Kempston to Oviedo (Florida) | 4,300.79 mi (6,921.45 km) |
| Kempston to Owasso (Oklahoma) | 4,497.76 mi (7,238.44 km) |
| Kempston to Owatonna (Minnesota) | 4,015.85 mi (6,462.88 km) |
| Kempston to Owensboro (Kentucky) | 4,091.04 mi (6,583.89 km) |
| Kempston to Owings Mills (Maryland) | 3,603.76 mi (5,799.69 km) |
| Kempston to Owosso (Michigan) | 3,731.64 mi (6,005.50 km) |
