| Costa Mesa to Romeoville (Illinois) | 1,711.23 mi (2,753.96 km) |
| Costa Mesa to Romulus (Michigan) | 1,957.79 mi (3,150.76 km) |
| Costa Mesa to Ronkonkoma (New York) | 2,484.99 mi (3,999.20 km) |
| Costa Mesa to Roosevelt (New York) | 2,461.47 mi (3,961.36 km) |
| Costa Mesa to Rosamond (California) | 84.63 mi (136.19 km) |
| Costa Mesa to Rosaryville (Maryland) | 2,297.83 mi (3,698.01 km) |
| Costa Mesa to Roscoe (Illinois) | 1,675.11 mi (2,695.84 km) |
| Costa Mesa to Rose Hill (Virginia) | 2,282.59 mi (3,673.47 km) |
| Costa Mesa to Roseburg (Oregon) | 722.48 mi (1,162.72 km) |
| Costa Mesa to Rosedale (California) | 139.87 mi (225.10 km) |
| Costa Mesa to Rosedale (Maryland) | 2,312.32 mi (3,721.32 km) |
| Costa Mesa to Roselle (Illinois) | 1,715.84 mi (2,761.38 km) |
| Costa Mesa to Roselle (New Jersey) | 2,426.18 mi (3,904.56 km) |
| Costa Mesa to Roselle Park (New Jersey) | 2,425.79 mi (3,903.93 km) |
| Costa Mesa to Rosemead (California) | 29.43 mi (47.36 km) |
