| Seini to Olympia Heights (Florida) | 5,507.62 mi (8,863.65 km) |
| Seini to Omaha (Nebraska) | 5,256.81 mi (8,460.01 km) |
| Seini to On Top of the World Designated Place (Florida) | 5,411.82 mi (8,709.49 km) |
| Seini to Onalaska (Wisconsin) | 4,961.29 mi (7,984.43 km) |
| Seini to Oneida (New York) | 4,462.49 mi (7,181.68 km) |
| Seini to Oneonta (New York) | 4,469.37 mi (7,192.75 km) |
| Seini to Ontario (California) | 6,289.73 mi (10,122.34 km) |
| Seini to Ontario (Oregon) | 5,651.75 mi (9,095.62 km) |
| Seini to Opa-locka (Florida) | 5,495.08 mi (8,843.48 km) |
| Seini to Opelika (Alabama) | 5,347.09 mi (8,605.31 km) |
| Seini to Opelousas (Louisiana) | 5,711.01 mi (9,190.99 km) |
| Seini to Orange (California) | 6,309.70 mi (10,154.48 km) |
| Seini to Orange (Texas) | 5,793.94 mi (9,324.45 km) |
| Seini to Orange City (Florida) | 5,380.63 mi (8,659.29 km) |
| Seini to Orangeburg (South Carolina) | 5,130.52 mi (8,256.77 km) |
