| Colfontaine to Oswego (Illinois) | 4,171.76 mi (6,713.79 km) |
| Colfontaine to Oswego (New York) | 3,633.68 mi (5,847.84 km) |
| Colfontaine to Otsego (Minnesota) | 4,195.36 mi (6,751.78 km) |
| Colfontaine to Ottawa (Illinois) | 4,205.70 mi (6,768.43 km) |
| Colfontaine to Ottawa (Kansas) | 4,581.37 mi (7,373.01 km) |
| Colfontaine to Ottumwa (Iowa) | 4,356.28 mi (7,010.76 km) |
| Colfontaine to Overland (Missouri) | 4,392.04 mi (7,068.30 km) |
| Colfontaine to Overland Park (Kansas) | 4,545.57 mi (7,315.39 km) |
| Colfontaine to Overlea (Maryland) | 3,811.72 mi (6,134.37 km) |
| Colfontaine to Oviedo (Florida) | 4,511.55 mi (7,260.65 km) |
| Colfontaine to Owasso (Oklahoma) | 4,719.46 mi (7,595.24 km) |
| Colfontaine to Owatonna (Minnesota) | 4,237.66 mi (6,819.86 km) |
| Colfontaine to Owensboro (Kentucky) | 4,311.31 mi (6,938.38 km) |
| Colfontaine to Owings Mills (Maryland) | 3,820.81 mi (6,148.99 km) |
| Colfontaine to Owosso (Michigan) | 3,952.96 mi (6,361.67 km) |
