| Valley Center to Oskaloosa (Iowa) | 1,445.18 mi (2,325.79 km) |
| Valley Center to Oswego (Illinois) | 1,668.28 mi (2,684.84 km) |
| Valley Center to Oswego (New York) | 2,280.99 mi (3,670.90 km) |
| Valley Center to Otsego (Minnesota) | 1,494.02 mi (2,404.40 km) |
| Valley Center to Ottawa (Illinois) | 1,639.14 mi (2,637.94 km) |
| Valley Center to Ottawa (Kansas) | 1,268.88 mi (2,042.07 km) |
| Valley Center to Ottumwa (Iowa) | 1,451.71 mi (2,336.30 km) |
| Valley Center to Overland (Missouri) | 1,531.27 mi (2,464.33 km) |
| Valley Center to Overland Park (Kansas) | 1,303.04 mi (2,097.04 km) |
| Valley Center to Overlea (Maryland) | 2,275.13 mi (3,661.47 km) |
| Valley Center to Oviedo (Florida) | 2,136.07 mi (3,437.68 km) |
| Valley Center to Owasso (Oklahoma) | 1,218.34 mi (1,960.72 km) |
| Valley Center to Owatonna (Minnesota) | 1,478.42 mi (2,379.28 km) |
| Valley Center to Owensboro (Kentucky) | 1,703.17 mi (2,740.99 km) |
| Valley Center to Owings Mills (Maryland) | 2,260.40 mi (3,637.77 km) |
