| Costa Mesa to Oswego (Illinois) | 1,699.69 mi (2,735.39 km) |
| Costa Mesa to Oswego (New York) | 2,311.08 mi (3,719.32 km) |
| Costa Mesa to Otsego (Minnesota) | 1,514.50 mi (2,437.36 km) |
| Costa Mesa to Ottawa (Illinois) | 1,671.11 mi (2,689.39 km) |
| Costa Mesa to Ottawa (Kansas) | 1,305.31 mi (2,100.69 km) |
| Costa Mesa to Ottumwa (Iowa) | 1,483.21 mi (2,386.99 km) |
| Costa Mesa to Overland (Missouri) | 1,568.59 mi (2,524.40 km) |
| Costa Mesa to Overland Park (Kansas) | 1,338.92 mi (2,154.79 km) |
| Costa Mesa to Overlea (Maryland) | 2,311.68 mi (3,720.29 km) |
| Costa Mesa to Oviedo (Florida) | 2,187.22 mi (3,520.00 km) |
| Costa Mesa to Owasso (Oklahoma) | 1,260.41 mi (2,028.43 km) |
| Costa Mesa to Owatonna (Minnesota) | 1,502.02 mi (2,417.27 km) |
| Costa Mesa to Owensboro (Kentucky) | 1,742.62 mi (2,804.48 km) |
| Costa Mesa to Owings Mills (Maryland) | 2,296.89 mi (3,696.49 km) |
| Costa Mesa to Owosso (Michigan) | 1,923.53 mi (3,095.63 km) |
