| Staines-upon-Thames to Olympia Heights (Florida) | 4,421.15 mi (7,115.16 km) |
| Staines-upon-Thames to Omaha (Nebraska) | 4,279.57 mi (6,887.31 km) |
| Staines-upon-Thames to On Top of the World Designated Place (Florida) | 4,333.94 mi (6,974.80 km) |
| Staines-upon-Thames to Onalaska (Wisconsin) | 3,976.21 mi (6,399.08 km) |
| Staines-upon-Thames to Oneida (New York) | 3,413.54 mi (5,493.56 km) |
| Staines-upon-Thames to Oneonta (New York) | 3,415.81 mi (5,497.22 km) |
| Staines-upon-Thames to Ontario (California) | 5,411.67 mi (8,709.24 km) |
| Staines-upon-Thames to Ontario (Oregon) | 4,829.72 mi (7,772.68 km) |
| Staines-upon-Thames to Opa-locka (Florida) | 4,408.73 mi (7,095.17 km) |
| Staines-upon-Thames to Opelika (Alabama) | 4,286.21 mi (6,898.00 km) |
| Staines-upon-Thames to Opelousas (Louisiana) | 4,664.94 mi (7,507.50 km) |
| Staines-upon-Thames to Orange (California) | 5,432.07 mi (8,742.07 km) |
| Staines-upon-Thames to Orange (Texas) | 4,752.76 mi (7,648.84 km) |
| Staines-upon-Thames to Orange City (Florida) | 4,300.52 mi (6,921.01 km) |
| Staines-upon-Thames to Orangeburg (South Carolina) | 4,060.18 mi (6,534.23 km) |
