| Gross-Gerau to Oswego (Illinois) | 4,363.02 mi (7,021.60 km) |
| Gross-Gerau to Oswego (New York) | 3,831.48 mi (6,166.16 km) |
| Gross-Gerau to Otsego (Minnesota) | 4,377.20 mi (7,044.42 km) |
| Gross-Gerau to Ottawa (Illinois) | 4,396.94 mi (7,076.20 km) |
| Gross-Gerau to Ottawa (Kansas) | 4,770.02 mi (7,676.61 km) |
| Gross-Gerau to Ottumwa (Iowa) | 4,544.78 mi (7,314.12 km) |
| Gross-Gerau to Overland (Missouri) | 4,584.91 mi (7,378.71 km) |
| Gross-Gerau to Overland Park (Kansas) | 4,734.44 mi (7,619.35 km) |
| Gross-Gerau to Overlea (Maryland) | 4,013.33 mi (6,458.83 km) |
| Gross-Gerau to Oviedo (Florida) | 4,717.24 mi (7,591.66 km) |
| Gross-Gerau to Owasso (Oklahoma) | 4,910.06 mi (7,901.98 km) |
| Gross-Gerau to Owatonna (Minnesota) | 4,421.50 mi (7,115.72 km) |
| Gross-Gerau to Owensboro (Kentucky) | 4,507.66 mi (7,254.38 km) |
| Gross-Gerau to Owings Mills (Maryland) | 4,022.23 mi (6,473.16 km) |
| Gross-Gerau to Owosso (Michigan) | 4,145.99 mi (6,672.32 km) |
