| Gifhorn to Oswego (Illinois) | 4,338.24 mi (6,981.72 km) |
| Gifhorn to Oswego (New York) | 3,825.51 mi (6,156.57 km) |
| Gifhorn to Otsego (Minnesota) | 4,332.33 mi (6,972.21 km) |
| Gifhorn to Ottawa (Illinois) | 4,372.02 mi (7,036.09 km) |
| Gifhorn to Ottawa (Kansas) | 4,738.33 mi (7,625.60 km) |
| Gifhorn to Ottumwa (Iowa) | 4,513.23 mi (7,263.34 km) |
| Gifhorn to Overland (Missouri) | 4,563.63 mi (7,344.45 km) |
| Gifhorn to Overland Park (Kansas) | 4,703.31 mi (7,569.25 km) |
| Gifhorn to Overlea (Maryland) | 4,020.00 mi (6,469.57 km) |
| Gifhorn to Oviedo (Florida) | 4,742.45 mi (7,632.23 km) |
| Gifhorn to Owasso (Oklahoma) | 4,882.55 mi (7,857.71 km) |
| Gifhorn to Owatonna (Minnesota) | 4,380.43 mi (7,049.63 km) |
| Gifhorn to Owensboro (Kentucky) | 4,495.89 mi (7,235.44 km) |
| Gifhorn to Owings Mills (Maryland) | 4,028.18 mi (6,482.72 km) |
| Gifhorn to Owosso (Michigan) | 4,126.05 mi (6,640.23 km) |
