| Gross-Gerau to Oakley (California) | 5,647.93 mi (9,089.47 km) |
| Gross-Gerau to Oakton (Virginia) | 4,066.60 mi (6,544.56 km) |
| Gross-Gerau to Oakville (Missouri) | 4,595.45 mi (7,395.66 km) |
| Gross-Gerau to Oatfield (Oregon) | 5,226.64 mi (8,411.46 km) |
| Gross-Gerau to Ocala (Florida) | 4,731.70 mi (7,614.93 km) |
| Gross-Gerau to Ocean Acres (New Jersey) | 3,905.69 mi (6,285.60 km) |
| Gross-Gerau to Ocean City (New Jersey) | 3,939.96 mi (6,340.75 km) |
| Gross-Gerau to Ocean Pines (Maryland) | 4,002.04 mi (6,440.65 km) |
| Gross-Gerau to Ocean Pointe (Hawaii) | 7,446.07 mi (11,983.30 km) |
| Gross-Gerau to Ocean Springs (Mississippi) | 4,941.45 mi (7,952.49 km) |
| Gross-Gerau to Oceanside (California) | 5,805.06 mi (9,342.34 km) |
| Gross-Gerau to Oceanside (New York) | 3,840.26 mi (6,180.31 km) |
| Gross-Gerau to Ocoee (Florida) | 4,735.68 mi (7,621.34 km) |
| Gross-Gerau to Oconomowoc (Wisconsin) | 4,300.84 mi (6,921.53 km) |
| Gross-Gerau to Odenton (Maryland) | 4,033.97 mi (6,492.05 km) |
