| Costa Mesa to Odessa (Texas) | 911.95 mi (1,467.65 km) |
| Costa Mesa to Ogden (Utah) | 615.49 mi (990.53 km) |
| Costa Mesa to Oildale (California) | 137.38 mi (221.08 km) |
| Costa Mesa to Ojus (Florida) | 2,311.63 mi (3,720.20 km) |
| Costa Mesa to Okemos (Michigan) | 1,908.83 mi (3,071.96 km) |
| Costa Mesa to Oklahoma City (Oklahoma) | 1,165.22 mi (1,875.25 km) |
| Costa Mesa to Okmulgee (Oklahoma) | 1,249.94 mi (2,011.59 km) |
| Costa Mesa to Olathe (Kansas) | 1,331.81 mi (2,143.34 km) |
| Costa Mesa to Old Jamestown (Missouri) | 1,573.87 mi (2,532.89 km) |
| Costa Mesa to Oldsmar (Florida) | 2,115.61 mi (3,404.75 km) |
| Costa Mesa to Olean (New York) | 2,209.16 mi (3,555.30 km) |
| Costa Mesa to Olive Branch (Mississippi) | 1,598.97 mi (2,573.29 km) |
| Costa Mesa to Olivehurst (California) | 425.27 mi (684.41 km) |
| Costa Mesa to Olney (Maryland) | 2,282.98 mi (3,674.10 km) |
| Costa Mesa to Olympia (Washington) | 960.11 mi (1,545.15 km) |
