| Box Elder to Oswego (Illinois) | 763.81 mi (1,229.23 km) |
| Box Elder to Oswego (New York) | 1,320.99 mi (2,125.93 km) |
| Box Elder to Otsego (Minnesota) | 471.27 mi (758.43 km) |
| Box Elder to Ottawa (Illinois) | 747.05 mi (1,202.26 km) |
| Box Elder to Ottawa (Kansas) | 555.82 mi (894.51 km) |
| Box Elder to Ottumwa (Iowa) | 582.62 mi (937.64 km) |
| Box Elder to Overland (Missouri) | 756.44 mi (1,217.38 km) |
| Box Elder to Overland Park (Kansas) | 564.32 mi (908.19 km) |
| Box Elder to Overlea (Maryland) | 1,401.68 mi (2,255.78 km) |
| Box Elder to Oviedo (Florida) | 1,610.32 mi (2,591.56 km) |
| Box Elder to Owasso (Oklahoma) | 661.71 mi (1,064.93 km) |
| Box Elder to Owatonna (Minnesota) | 488.46 mi (786.10 km) |
| Box Elder to Owensboro (Kentucky) | 939.63 mi (1,512.19 km) |
| Box Elder to Owings Mills (Maryland) | 1,386.90 mi (2,232.00 km) |
| Box Elder to Owosso (Michigan) | 947.73 mi (1,525.22 km) |
