| Welver to Oswego (Illinois) | 4,279.45 mi (6,887.11 km) |
| Welver to Oswego (New York) | 3,756.21 mi (6,045.04 km) |
| Welver to Otsego (Minnesota) | 4,285.28 mi (6,896.49 km) |
| Welver to Ottawa (Illinois) | 4,313.33 mi (6,941.63 km) |
| Welver to Ottawa (Kansas) | 4,683.64 mi (7,537.59 km) |
| Welver to Ottumwa (Iowa) | 4,458.38 mi (7,175.07 km) |
| Welver to Overland (Missouri) | 4,502.97 mi (7,246.82 km) |
| Welver to Overland Park (Kansas) | 4,648.28 mi (7,480.69 km) |
| Welver to Overlea (Maryland) | 3,944.24 mi (6,347.65 km) |
| Welver to Oviedo (Florida) | 4,657.91 mi (7,496.19 km) |
| Welver to Owasso (Oklahoma) | 4,825.51 mi (7,765.91 km) |
| Welver to Owatonna (Minnesota) | 4,331.12 mi (6,970.27 km) |
| Welver to Owensboro (Kentucky) | 4,429.98 mi (7,129.36 km) |
| Welver to Owings Mills (Maryland) | 3,952.79 mi (6,361.40 km) |
| Welver to Owosso (Michigan) | 4,064.46 mi (6,541.12 km) |
