| Campbell to Oswego (Illinois) | 1,806.57 mi (2,907.40 km) |
| Campbell to Oswego (New York) | 2,400.10 mi (3,862.58 km) |
| Campbell to Otsego (Minnesota) | 1,561.50 mi (2,512.99 km) |
| Campbell to Ottawa (Illinois) | 1,781.97 mi (2,867.80 km) |
| Campbell to Ottawa (Kansas) | 1,452.12 mi (2,336.96 km) |
| Campbell to Ottumwa (Iowa) | 1,595.67 mi (2,567.99 km) |
| Campbell to Overland (Missouri) | 1,714.23 mi (2,758.79 km) |
| Campbell to Overland Park (Kansas) | 1,481.52 mi (2,384.28 km) |
| Campbell to Overlea (Maryland) | 2,441.07 mi (3,928.52 km) |
| Campbell to Oviedo (Florida) | 2,417.28 mi (3,890.23 km) |
| Campbell to Owasso (Oklahoma) | 1,442.59 mi (2,321.62 km) |
| Campbell to Owatonna (Minnesota) | 1,567.53 mi (2,522.69 km) |
| Campbell to Owensboro (Kentucky) | 1,898.23 mi (3,054.91 km) |
| Campbell to Owings Mills (Maryland) | 2,426.09 mi (3,904.41 km) |
| Campbell to Owosso (Michigan) | 2,016.54 mi (3,245.31 km) |
