| Valley Center to Odenton (Maryland) | 2,266.53 mi (3,647.63 km) |
| Valley Center to Odessa (Texas) | 858.76 mi (1,382.04 km) |
| Valley Center to Ogden (Utah) | 617.97 mi (994.53 km) |
| Valley Center to Oildale (California) | 190.37 mi (306.36 km) |
| Valley Center to Ojus (Florida) | 2,258.35 mi (3,634.47 km) |
| Valley Center to Okemos (Michigan) | 1,878.51 mi (3,023.16 km) |
| Valley Center to Oklahoma City (Oklahoma) | 1,121.27 mi (1,804.50 km) |
| Valley Center to Okmulgee (Oklahoma) | 1,206.28 mi (1,941.32 km) |
| Valley Center to Olathe (Kansas) | 1,295.96 mi (2,085.65 km) |
| Valley Center to Old Jamestown (Missouri) | 1,536.84 mi (2,473.30 km) |
| Valley Center to Oldsmar (Florida) | 2,063.44 mi (3,320.79 km) |
| Valley Center to Olean (New York) | 2,176.93 mi (3,503.43 km) |
| Valley Center to Olive Branch (Mississippi) | 1,554.29 mi (2,501.39 km) |
| Valley Center to Olivehurst (California) | 476.65 mi (767.09 km) |
| Valley Center to Olney (Maryland) | 2,246.07 mi (3,614.71 km) |
