| Giessen to Oswego (Illinois) | 4,344.24 mi (6,991.39 km) |
| Giessen to Oswego (New York) | 3,816.68 mi (6,142.35 km) |
| Giessen to Otsego (Minnesota) | 4,354.15 mi (7,007.33 km) |
| Giessen to Ottawa (Illinois) | 4,378.15 mi (7,045.95 km) |
| Giessen to Ottawa (Kansas) | 4,749.86 mi (7,644.17 km) |
| Giessen to Ottumwa (Iowa) | 4,524.60 mi (7,281.64 km) |
| Giessen to Overland (Missouri) | 4,566.96 mi (7,349.80 km) |
| Giessen to Overland Park (Kansas) | 4,714.39 mi (7,587.08 km) |
| Giessen to Overlea (Maryland) | 4,001.43 mi (6,439.68 km) |
| Giessen to Oviedo (Florida) | 4,709.81 mi (7,579.71 km) |
| Giessen to Owasso (Oklahoma) | 4,890.83 mi (7,871.04 km) |
| Giessen to Owatonna (Minnesota) | 4,399.27 mi (7,079.93 km) |
| Giessen to Owensboro (Kentucky) | 4,491.77 mi (7,228.80 km) |
| Giessen to Owings Mills (Maryland) | 4,010.17 mi (6,453.75 km) |
| Giessen to Owosso (Michigan) | 4,128.20 mi (6,643.70 km) |
