| Lake in the Hills to Oswego (Illinois) | 35.10 mi (56.48 km) |
| Lake in the Hills to Oswego (New York) | 606.14 mi (975.49 km) |
| Lake in the Hills to Otsego (Minnesota) | 338.14 mi (544.19 km) |
| Lake in the Hills to Ottawa (Illinois) | 62.79 mi (101.05 km) |
| Lake in the Hills to Ottawa (Kansas) | 440.25 mi (708.51 km) |
| Lake in the Hills to Ottumwa (Iowa) | 225.33 mi (362.64 km) |
| Lake in the Hills to Overland (Missouri) | 263.79 mi (424.53 km) |
| Lake in the Hills to Overland Park (Kansas) | 403.46 mi (649.30 km) |
| Lake in the Hills to Overlea (Maryland) | 648.41 mi (1,043.52 km) |
| Lake in the Hills to Oviedo (Florida) | 1,017.30 mi (1,637.18 km) |
| Lake in the Hills to Owasso (Oklahoma) | 571.16 mi (919.20 km) |
| Lake in the Hills to Owatonna (Minnesota) | 278.95 mi (448.92 km) |
| Lake in the Hills to Owensboro (Kentucky) | 313.19 mi (504.03 km) |
| Lake in the Hills to Owings Mills (Maryland) | 633.61 mi (1,019.69 km) |
| Lake in the Hills to Owosso (Michigan) | 219.32 mi (352.96 km) |
