| Islington to Oswego (Illinois) | 3,983.31 mi (6,410.52 km) |
| Islington to Oswego (New York) | 3,444.56 mi (5,543.49 km) |
| Islington to Otsego (Minnesota) | 4,009.67 mi (6,452.94 km) |
| Islington to Ottawa (Illinois) | 4,017.26 mi (6,465.15 km) |
| Islington to Ottawa (Kansas) | 4,393.49 mi (7,070.64 km) |
| Islington to Ottumwa (Iowa) | 4,168.46 mi (6,708.49 km) |
| Islington to Overland (Missouri) | 4,203.29 mi (6,764.54 km) |
| Islington to Overland Park (Kansas) | 4,357.63 mi (7,012.94 km) |
| Islington to Overlea (Maryland) | 3,623.16 mi (5,830.91 km) |
| Islington to Oviedo (Florida) | 4,325.56 mi (6,961.32 km) |
| Islington to Owasso (Oklahoma) | 4,531.12 mi (7,292.13 km) |
| Islington to Owatonna (Minnesota) | 4,051.25 mi (6,519.86 km) |
| Islington to Owensboro (Kentucky) | 4,122.21 mi (6,634.05 km) |
| Islington to Owings Mills (Maryland) | 3,632.19 mi (5,845.45 km) |
| Islington to Owosso (Michigan) | 3,764.21 mi (6,057.90 km) |
