| Gross-Gerau to Orangevale (California) | 5,593.48 mi (9,001.84 km) |
| Gross-Gerau to Orchards (Washington) | 5,208.57 mi (8,382.39 km) |
| Gross-Gerau to Orcutt (California) | 5,799.38 mi (9,333.21 km) |
| Gross-Gerau to Oregon (Ohio) | 4,180.14 mi (6,727.29 km) |
| Gross-Gerau to Oregon (Wisconsin) | 4,341.71 mi (6,987.31 km) |
| Gross-Gerau to Oregon City (Oregon) | 5,230.83 mi (8,418.20 km) |
| Gross-Gerau to Orem (Utah) | 5,226.43 mi (8,411.13 km) |
| Gross-Gerau to Orinda (California) | 5,667.71 mi (9,121.30 km) |
| Gross-Gerau to Orland Park (Illinois) | 4,349.06 mi (6,999.14 km) |
| Gross-Gerau to Orlando (Florida) | 4,732.54 mi (7,616.29 km) |
| Gross-Gerau to Ormond Beach (Florida) | 4,681.79 mi (7,534.61 km) |
| Gross-Gerau to Oro Valley (Arizona) | 5,650.77 mi (9,094.03 km) |
| Gross-Gerau to Oroville (California) | 5,554.12 mi (8,938.50 km) |
| Gross-Gerau to Oshkosh (Wisconsin) | 4,259.28 mi (6,854.65 km) |
| Gross-Gerau to Oskaloosa (Iowa) | 4,539.20 mi (7,305.14 km) |
