| Elmhurst to Oswego (Illinois) | 25.11 mi (40.41 km) |
| Elmhurst to Oswego (New York) | 590.61 mi (950.50 km) |
| Elmhurst to Otsego (Minnesota) | 367.14 mi (590.85 km) |
| Elmhurst to Ottawa (Illinois) | 59.00 mi (94.95 km) |
| Elmhurst to Ottawa (Kansas) | 448.03 mi (721.04 km) |
| Elmhurst to Ottumwa (Iowa) | 239.51 mi (385.46 km) |
| Elmhurst to Overland (Missouri) | 255.40 mi (411.03 km) |
| Elmhurst to Overland Park (Kansas) | 411.15 mi (661.69 km) |
| Elmhurst to Overlea (Maryland) | 623.61 mi (1,003.60 km) |
| Elmhurst to Oviedo (Florida) | 990.10 mi (1,593.41 km) |
| Elmhurst to Owasso (Oklahoma) | 573.24 mi (922.53 km) |
| Elmhurst to Owatonna (Minnesota) | 307.14 mi (494.30 km) |
| Elmhurst to Owensboro (Kentucky) | 289.37 mi (465.69 km) |
| Elmhurst to Owings Mills (Maryland) | 608.75 mi (979.69 km) |
| Elmhurst to Owosso (Michigan) | 206.49 mi (332.31 km) |
