| Blue Island to Oswego (Illinois) | 33.91 mi (54.57 km) |
| Blue Island to Oswego (New York) | 581.91 mi (936.49 km) |
| Blue Island to Otsego (Minnesota) | 388.22 mi (624.78 km) |
| Blue Island to Ottawa (Illinois) | 62.82 mi (101.10 km) |
| Blue Island to Ottawa (Kansas) | 452.65 mi (728.47 km) |
| Blue Island to Ottumwa (Iowa) | 249.66 mi (401.78 km) |
| Blue Island to Overland (Missouri) | 248.95 mi (400.65 km) |
| Blue Island to Overland Park (Kansas) | 415.81 mi (669.18 km) |
| Blue Island to Overlea (Maryland) | 606.96 mi (976.81 km) |
| Blue Island to Oviedo (Florida) | 969.45 mi (1,560.18 km) |
| Blue Island to Owasso (Oklahoma) | 573.39 mi (922.78 km) |
| Blue Island to Owatonna (Minnesota) | 327.37 mi (526.86 km) |
| Blue Island to Owensboro (Kentucky) | 271.14 mi (436.36 km) |
| Blue Island to Owings Mills (Maryland) | 592.07 mi (952.84 km) |
| Blue Island to Owosso (Michigan) | 201.47 mi (324.24 km) |
