| Annan to Olympia Heights (Florida) | 4,276.41 mi (6,882.21 km) |
| Annan to Omaha (Nebraska) | 4,057.46 mi (6,529.85 km) |
| Annan to On Top of the World Designated Place (Florida) | 4,173.61 mi (6,716.78 km) |
| Annan to Onalaska (Wisconsin) | 3,756.27 mi (6,045.13 km) |
| Annan to Oneida (New York) | 3,225.07 mi (5,190.26 km) |
| Annan to Oneonta (New York) | 3,230.83 mi (5,199.52 km) |
| Annan to Ontario (California) | 5,167.09 mi (8,315.63 km) |
| Annan to Ontario (Oregon) | 4,575.16 mi (7,363.00 km) |
| Annan to Opa-locka (Florida) | 4,263.72 mi (6,861.79 km) |
| Annan to Opelika (Alabama) | 4,107.61 mi (6,610.56 km) |
| Annan to Opelousas (Louisiana) | 4,475.44 mi (7,202.52 km) |
| Annan to Orange (California) | 5,187.46 mi (8,348.40 km) |
| Annan to Orange (Texas) | 4,560.22 mi (7,338.97 km) |
| Annan to Orange City (Florida) | 4,143.51 mi (6,668.34 km) |
| Annan to Orangeburg (South Carolina) | 3,890.68 mi (6,261.45 km) |
