| Sigmaringen to Olympia Heights (Florida) | 4,896.85 mi (7,880.72 km) |
| Sigmaringen to Omaha (Nebraska) | 4,766.71 mi (7,671.28 km) |
| Sigmaringen to On Top of the World Designated Place (Florida) | 4,816.94 mi (7,752.11 km) |
| Sigmaringen to Onalaska (Wisconsin) | 4,464.08 mi (7,184.25 km) |
| Sigmaringen to Oneida (New York) | 3,904.42 mi (6,283.56 km) |
| Sigmaringen to Oneonta (New York) | 3,906.27 mi (6,286.53 km) |
| Sigmaringen to Ontario (California) | 5,882.34 mi (9,466.72 km) |
| Sigmaringen to Ontario (Oregon) | 5,285.20 mi (8,505.71 km) |
| Sigmaringen to Opa-locka (Florida) | 4,884.59 mi (7,860.98 km) |
| Sigmaringen to Opelika (Alabama) | 4,775.09 mi (7,684.77 km) |
| Sigmaringen to Opelousas (Louisiana) | 5,155.67 mi (8,297.25 km) |
| Sigmaringen to Orange (California) | 5,902.70 mi (9,499.47 km) |
| Sigmaringen to Orange (Texas) | 5,243.81 mi (8,439.10 km) |
| Sigmaringen to Orange City (Florida) | 4,782.19 mi (7,696.20 km) |
| Sigmaringen to Orangeburg (South Carolina) | 4,546.71 mi (7,317.22 km) |
