| Monroe to Oakley (California) | 1,705.62 mi (2,744.92 km) |
| Monroe to Oakton (Virginia) | 936.96 mi (1,507.89 km) |
| Monroe to Oakville (Missouri) | 421.42 mi (678.21 km) |
| Monroe to Oatfield (Oregon) | 1,849.90 mi (2,977.13 km) |
| Monroe to Ocala (Florida) | 632.09 mi (1,017.26 km) |
| Monroe to Ocean Acres (New Jersey) | 1,108.76 mi (1,784.37 km) |
| Monroe to Ocean City (New Jersey) | 1,081.14 mi (1,739.92 km) |
| Monroe to Ocean Pines (Maryland) | 1,033.40 mi (1,663.09 km) |
| Monroe to Ocean Pointe (Hawaii) | 4,074.30 mi (6,556.95 km) |
| Monroe to Ocean Springs (Mississippi) | 242.64 mi (390.49 km) |
| Monroe to Oceanside (California) | 1,461.43 mi (2,351.94 km) |
| Monroe to Oceanside (New York) | 1,163.38 mi (1,872.28 km) |
| Monroe to Ocoee (Florida) | 683.45 mi (1,099.91 km) |
| Monroe to Oconomowoc (Wisconsin) | 756.58 mi (1,217.60 km) |
| Monroe to Odenton (Maryland) | 971.79 mi (1,563.95 km) |
