| Boppard to Oakley (California) | 5,606.58 mi (9,022.93 km) |
| Boppard to Oakton (Virginia) | 4,021.57 mi (6,472.09 km) |
| Boppard to Oakville (Missouri) | 4,550.40 mi (7,323.15 km) |
| Boppard to Oatfield (Oregon) | 5,186.80 mi (8,347.35 km) |
| Boppard to Ocala (Florida) | 4,687.08 mi (7,543.12 km) |
| Boppard to Ocean Acres (New Jersey) | 3,860.73 mi (6,213.24 km) |
| Boppard to Ocean City (New Jersey) | 3,895.01 mi (6,268.42 km) |
| Boppard to Ocean Pines (Maryland) | 3,957.12 mi (6,368.37 km) |
| Boppard to Ocean Pointe (Hawaii) | 7,415.78 mi (11,934.54 km) |
| Boppard to Ocean Springs (Mississippi) | 4,896.38 mi (7,879.97 km) |
| Boppard to Oceanside (California) | 5,762.15 mi (9,273.29 km) |
| Boppard to Oceanside (New York) | 3,795.27 mi (6,107.90 km) |
| Boppard to Ocoee (Florida) | 4,691.17 mi (7,549.71 km) |
| Boppard to Oconomowoc (Wisconsin) | 4,255.96 mi (6,849.30 km) |
| Boppard to Odenton (Maryland) | 3,988.95 mi (6,419.60 km) |
