| Barth to Oswego (Illinois) | 4,339.16 mi (6,983.20 km) |
| Barth to Oswego (New York) | 3,842.64 mi (6,184.12 km) |
| Barth to Otsego (Minnesota) | 4,317.06 mi (6,947.63 km) |
| Barth to Ottawa (Illinois) | 4,372.76 mi (7,037.28 km) |
| Barth to Ottawa (Kansas) | 4,732.85 mi (7,616.79 km) |
| Barth to Ottumwa (Iowa) | 4,508.34 mi (7,255.47 km) |
| Barth to Overland (Missouri) | 4,566.86 mi (7,349.65 km) |
| Barth to Overland Park (Kansas) | 4,698.36 mi (7,561.28 km) |
| Barth to Overlea (Maryland) | 4,046.53 mi (6,512.27 km) |
| Barth to Oviedo (Florida) | 4,781.80 mi (7,695.56 km) |
| Barth to Owasso (Oklahoma) | 4,880.14 mi (7,853.83 km) |
| Barth to Owatonna (Minnesota) | 4,368.15 mi (7,029.85 km) |
| Barth to Owensboro (Kentucky) | 4,506.84 mi (7,253.06 km) |
| Barth to Owings Mills (Maryland) | 4,054.12 mi (6,524.48 km) |
| Barth to Owosso (Michigan) | 4,131.33 mi (6,648.74 km) |
