| London to Oswego (Illinois) | 3,983.56 mi (6,410.92 km) |
| London to Oswego (New York) | 3,444.56 mi (5,543.48 km) |
| London to Otsego (Minnesota) | 4,010.21 mi (6,453.81 km) |
| London to Ottawa (Illinois) | 4,017.51 mi (6,465.55 km) |
| London to Ottawa (Kansas) | 4,393.82 mi (7,071.17 km) |
| London to Ottumwa (Iowa) | 4,168.80 mi (6,709.03 km) |
| London to Overland (Missouri) | 4,203.47 mi (6,764.84 km) |
| London to Overland Park (Kansas) | 4,357.96 mi (7,013.46 km) |
| London to Overlea (Maryland) | 3,622.96 mi (5,830.59 km) |
| London to Oviedo (Florida) | 4,325.07 mi (6,960.52 km) |
| London to Owasso (Oklahoma) | 4,531.38 mi (7,292.56 km) |
| London to Owatonna (Minnesota) | 4,051.74 mi (6,520.64 km) |
| London to Owensboro (Kentucky) | 4,122.26 mi (6,634.13 km) |
| London to Owings Mills (Maryland) | 3,632.00 mi (5,845.14 km) |
| London to Owosso (Michigan) | 3,764.39 mi (6,058.20 km) |
