| Gross-Gerau to Odessa (Texas) | 5,382.10 mi (8,661.66 km) |
| Gross-Gerau to Ogden (Utah) | 5,181.94 mi (8,339.52 km) |
| Gross-Gerau to Oildale (California) | 5,726.04 mi (9,215.16 km) |
| Gross-Gerau to Ojus (Florida) | 4,808.89 mi (7,739.16 km) |
| Gross-Gerau to Okemos (Michigan) | 4,168.34 mi (6,708.30 km) |
| Gross-Gerau to Oklahoma City (Oklahoma) | 5,014.54 mi (8,070.12 km) |
| Gross-Gerau to Okmulgee (Oklahoma) | 4,951.61 mi (7,968.85 km) |
| Gross-Gerau to Olathe (Kansas) | 4,739.45 mi (7,627.40 km) |
| Gross-Gerau to Old Jamestown (Missouri) | 4,574.67 mi (7,362.22 km) |
| Gross-Gerau to Oldsmar (Florida) | 4,809.81 mi (7,740.64 km) |
| Gross-Gerau to Olean (New York) | 3,967.28 mi (6,384.72 km) |
| Gross-Gerau to Olive Branch (Mississippi) | 4,752.14 mi (7,647.82 km) |
| Gross-Gerau to Olivehurst (California) | 5,579.10 mi (8,978.70 km) |
| Gross-Gerau to Olney (Maryland) | 4,045.56 mi (6,510.70 km) |
| Gross-Gerau to Olympia (Washington) | 5,136.47 mi (8,266.36 km) |
