| Boppard to Orangevale (California) | 5,552.14 mi (8,935.31 km) |
| Boppard to Orchards (Washington) | 5,168.77 mi (8,318.34 km) |
| Boppard to Orcutt (California) | 5,757.29 mi (9,265.47 km) |
| Boppard to Oregon (Ohio) | 4,135.03 mi (6,654.70 km) |
| Boppard to Oregon (Wisconsin) | 4,296.86 mi (6,915.14 km) |
| Boppard to Oregon City (Oregon) | 5,190.97 mi (8,354.07 km) |
| Boppard to Orem (Utah) | 5,183.57 mi (8,342.14 km) |
| Boppard to Orinda (California) | 5,626.46 mi (9,054.91 km) |
| Boppard to Orland Park (Illinois) | 4,304.07 mi (6,926.73 km) |
| Boppard to Orlando (Florida) | 4,688.06 mi (7,544.70 km) |
| Boppard to Ormond Beach (Florida) | 4,637.25 mi (7,462.93 km) |
| Boppard to Oro Valley (Arizona) | 5,606.82 mi (9,023.30 km) |
| Boppard to Oroville (California) | 5,512.99 mi (8,872.31 km) |
| Boppard to Oshkosh (Wisconsin) | 4,214.47 mi (6,782.54 km) |
| Boppard to Oskaloosa (Iowa) | 4,494.42 mi (7,233.06 km) |
