| Highbury to Olympia Heights (Florida) | 4,437.37 mi (7,141.26 km) |
| Highbury to Omaha (Nebraska) | 4,290.32 mi (6,904.61 km) |
| Highbury to On Top of the World Designated Place (Florida) | 4,349.35 mi (6,999.61 km) |
| Highbury to Onalaska (Wisconsin) | 3,987.15 mi (6,416.69 km) |
| Highbury to Oneida (New York) | 3,427.08 mi (5,515.35 km) |
| Highbury to Oneonta (New York) | 3,429.60 mi (5,519.41 km) |
| Highbury to Ontario (California) | 5,419.68 mi (8,722.13 km) |
| Highbury to Ontario (Oregon) | 4,835.95 mi (7,782.71 km) |
| Highbury to Opa-locka (Florida) | 4,424.94 mi (7,121.25 km) |
| Highbury to Opelika (Alabama) | 4,300.53 mi (6,921.04 km) |
| Highbury to Opelousas (Louisiana) | 4,678.55 mi (7,529.40 km) |
| Highbury to Orange (California) | 5,440.08 mi (8,754.96 km) |
| Highbury to Orange (Texas) | 4,766.16 mi (7,670.39 km) |
| Highbury to Orange City (Florida) | 4,316.11 mi (6,946.11 km) |
| Highbury to Orangeburg (South Carolina) | 4,075.04 mi (6,558.15 km) |
