| West Monroe to Oskaloosa (Iowa) | 607.25 mi (977.28 km) |
| West Monroe to Oswego (Illinois) | 667.44 mi (1,074.14 km) |
| West Monroe to Oswego (New York) | 1,135.70 mi (1,827.74 km) |
| West Monroe to Otsego (Minnesota) | 884.71 mi (1,423.80 km) |
| West Monroe to Ottawa (Illinois) | 637.88 mi (1,026.57 km) |
| West Monroe to Ottawa (Kansas) | 455.46 mi (732.99 km) |
| West Monroe to Ottumwa (Iowa) | 588.00 mi (946.29 km) |
| West Monroe to Overland (Missouri) | 438.86 mi (706.28 km) |
| West Monroe to Overland Park (Kansas) | 462.82 mi (744.84 km) |
| West Monroe to Overlea (Maryland) | 992.49 mi (1,597.26 km) |
| West Monroe to Oviedo (Florida) | 703.95 mi (1,132.90 km) |
| West Monroe to Owasso (Oklahoma) | 334.70 mi (538.65 km) |
| West Monroe to Owatonna (Minnesota) | 802.16 mi (1,290.96 km) |
| West Monroe to Owensboro (Kentucky) | 460.55 mi (741.19 km) |
| West Monroe to Owings Mills (Maryland) | 980.46 mi (1,577.90 km) |
