| Twickenham to Olympia Heights (Florida) | 4,428.37 mi (7,126.78 km) |
| Twickenham to Omaha (Nebraska) | 4,285.37 mi (6,896.64 km) |
| Twickenham to On Top of the World Designated Place (Florida) | 4,340.98 mi (6,986.14 km) |
| Twickenham to Onalaska (Wisconsin) | 3,982.06 mi (6,408.51 km) |
| Twickenham to Oneida (New York) | 3,420.12 mi (5,504.15 km) |
| Twickenham to Oneonta (New York) | 3,422.46 mi (5,507.92 km) |
| Twickenham to Ontario (California) | 5,416.62 mi (8,717.21 km) |
| Twickenham to Ontario (Oregon) | 4,834.09 mi (7,779.72 km) |
| Twickenham to Opa-locka (Florida) | 4,415.95 mi (7,106.78 km) |
| Twickenham to Opelika (Alabama) | 4,293.00 mi (6,908.92 km) |
| Twickenham to Opelousas (Louisiana) | 4,671.54 mi (7,518.12 km) |
| Twickenham to Orange (California) | 5,437.03 mi (8,750.05 km) |
| Twickenham to Orange (Texas) | 4,759.31 mi (7,659.37 km) |
| Twickenham to Orange City (Florida) | 4,307.61 mi (6,932.42 km) |
| Twickenham to Orangeburg (South Carolina) | 4,067.10 mi (6,545.36 km) |
