| South Elgin to Oskaloosa (Iowa) | 228.54 mi (367.80 km) |
| South Elgin to Oswego (Illinois) | 21.26 mi (34.22 km) |
| South Elgin to Oswego (New York) | 607.53 mi (977.73 km) |
| South Elgin to Otsego (Minnesota) | 348.65 mi (561.09 km) |
| South Elgin to Ottawa (Illinois) | 51.24 mi (82.46 km) |
| South Elgin to Ottawa (Kansas) | 434.57 mi (699.37 km) |
| South Elgin to Ottumwa (Iowa) | 222.73 mi (358.45 km) |
| South Elgin to Overland (Missouri) | 252.00 mi (405.55 km) |
| South Elgin to Overland Park (Kansas) | 397.72 mi (640.07 km) |
| South Elgin to Overlea (Maryland) | 643.58 mi (1,035.75 km) |
| South Elgin to Oviedo (Florida) | 1,004.03 mi (1,615.84 km) |
| South Elgin to Owasso (Oklahoma) | 563.08 mi (906.20 km) |
| South Elgin to Owatonna (Minnesota) | 287.56 mi (462.79 km) |
| South Elgin to Owensboro (Kentucky) | 299.27 mi (481.63 km) |
| South Elgin to Owings Mills (Maryland) | 628.73 mi (1,011.84 km) |
