| Sigmaringen to Oswego (Illinois) | 4,461.85 mi (7,180.66 km) |
| Sigmaringen to Oswego (New York) | 3,922.41 mi (6,312.51 km) |
| Sigmaringen to Otsego (Minnesota) | 4,484.23 mi (7,216.68 km) |
| Sigmaringen to Ottawa (Illinois) | 4,495.80 mi (7,235.30 km) |
| Sigmaringen to Ottawa (Kansas) | 4,871.43 mi (7,839.81 km) |
| Sigmaringen to Ottumwa (Iowa) | 4,646.33 mi (7,477.54 km) |
| Sigmaringen to Overland (Missouri) | 4,682.01 mi (7,534.96 km) |
| Sigmaringen to Overland Park (Kansas) | 4,835.64 mi (7,782.21 km) |
| Sigmaringen to Overlea (Maryland) | 4,097.90 mi (6,594.93 km) |
| Sigmaringen to Oviedo (Florida) | 4,791.22 mi (7,710.72 km) |
| Sigmaringen to Owasso (Oklahoma) | 5,009.58 mi (8,062.13 km) |
| Sigmaringen to Owatonna (Minnesota) | 4,527.02 mi (7,285.53 km) |
| Sigmaringen to Owensboro (Kentucky) | 4,600.52 mi (7,403.83 km) |
| Sigmaringen to Owings Mills (Maryland) | 4,107.15 mi (6,609.82 km) |
| Sigmaringen to Owosso (Michigan) | 4,242.93 mi (6,828.33 km) |
