| South El Monte to Orangeburg (South Carolina) | 2,123.93 mi (3,418.13 km) |
| South El Monte to Orangevale (California) | 365.83 mi (588.75 km) |
| South El Monte to Orchards (Washington) | 838.25 mi (1,349.03 km) |
| South El Monte to Orcutt (California) | 146.61 mi (235.95 km) |
| South El Monte to Oregon (Ohio) | 1,945.83 mi (3,131.51 km) |
| South El Monte to Oregon (Wisconsin) | 1,656.77 mi (2,666.32 km) |
| South El Monte to Oregon City (Oregon) | 816.42 mi (1,313.89 km) |
| South El Monte to Orem (Utah) | 555.17 mi (893.45 km) |
| South El Monte to Orinda (California) | 351.26 mi (565.29 km) |
| South El Monte to Orland Park (Illinois) | 1,718.01 mi (2,764.87 km) |
| South El Monte to Orlando (Florida) | 2,190.19 mi (3,524.77 km) |
| South El Monte to Ormond Beach (Florida) | 2,185.31 mi (3,516.92 km) |
| South El Monte to Oro Valley (Arizona) | 423.79 mi (682.02 km) |
| South El Monte to Oroville (California) | 423.78 mi (682.01 km) |
| South El Monte to Oshkosh (Wisconsin) | 1,714.08 mi (2,758.55 km) |
