| West Monroe to Orangeburg (South Carolina) | 657.03 mi (1,057.39 km) |
| West Monroe to Orangevale (California) | 1,680.16 mi (2,703.96 km) |
| West Monroe to Orchards (Washington) | 1,849.92 mi (2,977.16 km) |
| West Monroe to Orcutt (California) | 1,628.00 mi (2,620.02 km) |
| West Monroe to Oregon (Ohio) | 792.67 mi (1,275.69 km) |
| West Monroe to Oregon (Wisconsin) | 735.04 mi (1,182.92 km) |
| West Monroe to Oregon City (Oregon) | 1,845.18 mi (2,969.52 km) |
| West Monroe to Orem (Utah) | 1,209.23 mi (1,946.07 km) |
| West Monroe to Orinda (California) | 1,727.60 mi (2,780.30 km) |
| West Monroe to Orland Park (Illinois) | 671.22 mi (1,080.23 km) |
| West Monroe to Orlando (Florida) | 701.13 mi (1,128.35 km) |
| West Monroe to Ormond Beach (Florida) | 691.26 mi (1,112.47 km) |
| West Monroe to Oro Valley (Arizona) | 1,096.00 mi (1,763.84 km) |
| West Monroe to Oroville (California) | 1,704.75 mi (2,743.53 km) |
| West Monroe to Oshkosh (Wisconsin) | 818.57 mi (1,317.37 km) |
