| Darton to Oswego (Illinois) | 3,865.97 mi (6,221.68 km) |
| Darton to Oswego (New York) | 3,337.25 mi (5,370.78 km) |
| Darton to Otsego (Minnesota) | 3,882.30 mi (6,247.96 km) |
| Darton to Ottawa (Illinois) | 3,899.89 mi (6,276.27 km) |
| Darton to Ottawa (Kansas) | 4,273.04 mi (6,876.80 km) |
| Darton to Ottumwa (Iowa) | 4,047.82 mi (6,514.33 km) |
| Darton to Overland (Missouri) | 4,088.09 mi (6,579.14 km) |
| Darton to Overland Park (Kansas) | 4,237.44 mi (6,819.49 km) |
| Darton to Overlea (Maryland) | 3,523.84 mi (5,671.07 km) |
| Darton to Oviedo (Florida) | 4,238.77 mi (6,821.64 km) |
| Darton to Owasso (Oklahoma) | 4,412.98 mi (7,102.00 km) |
| Darton to Owatonna (Minnesota) | 3,925.74 mi (6,317.88 km) |
| Darton to Owensboro (Kentucky) | 4,012.22 mi (6,457.04 km) |
| Darton to Owings Mills (Maryland) | 3,532.41 mi (5,684.87 km) |
| Darton to Owosso (Michigan) | 3,649.22 mi (5,872.86 km) |
