| Siemiatycze to Olympia Heights (Florida) | 5,346.15 mi (8,603.80 km) |
| Siemiatycze to Omaha (Nebraska) | 5,007.67 mi (8,059.06 km) |
| Siemiatycze to On Top of the World Designated Place (Florida) | 5,233.22 mi (8,422.05 km) |
| Siemiatycze to Onalaska (Wisconsin) | 4,717.03 mi (7,591.33 km) |
| Siemiatycze to Oneida (New York) | 4,257.65 mi (6,852.02 km) |
| Siemiatycze to Oneonta (New York) | 4,268.22 mi (6,869.04 km) |
| Siemiatycze to Ontario (California) | 6,004.77 mi (9,663.74 km) |
| Siemiatycze to Ontario (Oregon) | 5,357.48 mi (8,622.04 km) |
| Siemiatycze to Opa-locka (Florida) | 5,333.35 mi (8,583.20 km) |
| Siemiatycze to Opelika (Alabama) | 5,148.19 mi (8,285.21 km) |
| Siemiatycze to Opelousas (Louisiana) | 5,497.71 mi (8,847.71 km) |
| Siemiatycze to Orange (California) | 6,024.55 mi (9,695.58 km) |
| Siemiatycze to Orange (Texas) | 5,576.61 mi (8,974.69 km) |
| Siemiatycze to Orange City (Florida) | 5,205.83 mi (8,377.98 km) |
| Siemiatycze to Orangeburg (South Carolina) | 4,942.78 mi (7,954.64 km) |
