| Witham to Oswego (Illinois) | 4,003.04 mi (6,442.26 km) |
| Witham to Oswego (New York) | 3,467.03 mi (5,579.65 km) |
| Witham to Otsego (Minnesota) | 4,026.01 mi (6,479.24 km) |
| Witham to Ottawa (Illinois) | 4,036.98 mi (6,496.89 km) |
| Witham to Ottawa (Kansas) | 4,412.28 mi (7,100.87 km) |
| Witham to Ottumwa (Iowa) | 4,187.16 mi (6,738.59 km) |
| Witham to Overland (Missouri) | 4,223.67 mi (6,797.35 km) |
| Witham to Overland Park (Kansas) | 4,376.50 mi (7,043.29 km) |
| Witham to Overlea (Maryland) | 3,647.57 mi (5,870.20 km) |
| Witham to Oviedo (Florida) | 4,352.65 mi (7,004.91 km) |
| Witham to Owasso (Oklahoma) | 4,550.65 mi (7,323.56 km) |
| Witham to Owatonna (Minnesota) | 4,068.28 mi (6,547.27 km) |
| Witham to Owensboro (Kentucky) | 4,144.05 mi (6,669.20 km) |
| Witham to Owings Mills (Maryland) | 3,656.50 mi (5,884.57 km) |
| Witham to Owosso (Michigan) | 3,784.61 mi (6,090.75 km) |
