| Costa Mesa to Altus (Oklahoma) | 1,064.50 mi (1,713.15 km) |
| Costa Mesa to Alum Rock (California) | 337.28 mi (542.80 km) |
| Costa Mesa to Alvin (Texas) | 1,361.62 mi (2,191.32 km) |
| Costa Mesa to Amarillo (Texas) | 921.53 mi (1,483.07 km) |
| Costa Mesa to Amelia (Ohio) | 1,899.92 mi (3,057.62 km) |
| Costa Mesa to American Canyon (California) | 395.27 mi (636.12 km) |
| Costa Mesa to American Fork (Utah) | 573.20 mi (922.48 km) |
| Costa Mesa to Americus (Georgia) | 1,949.49 mi (3,137.40 km) |
| Costa Mesa to Ames (Iowa) | 1,439.23 mi (2,316.22 km) |
| Costa Mesa to Amherst (Ohio) | 2,011.25 mi (3,236.79 km) |
| Costa Mesa to Ammon (Idaho) | 749.66 mi (1,206.45 km) |
| Costa Mesa to Amsterdam (New York) | 2,426.40 mi (3,904.92 km) |
| Costa Mesa to Anacortes (Washington) | 1,052.55 mi (1,693.91 km) |
| Costa Mesa to Anaheim (California) | 12.33 mi (19.85 km) |
| Costa Mesa to Anchorage (Alaska) | 2,348.93 mi (3,780.23 km) |
