| Huntington to Olympia Heights (Florida) | 4,372.88 mi (7,037.48 km) |
| Huntington to Omaha (Nebraska) | 4,168.80 mi (6,709.04 km) |
| Huntington to On Top of the World Designated Place (Florida) | 4,273.86 mi (6,878.11 km) |
| Huntington to Onalaska (Wisconsin) | 3,867.35 mi (6,223.90 km) |
| Huntington to Oneida (New York) | 3,331.08 mi (5,360.85 km) |
| Huntington to Oneonta (New York) | 3,336.14 mi (5,369.00 km) |
| Huntington to Ontario (California) | 5,279.46 mi (8,496.46 km) |
| Huntington to Ontario (Oregon) | 4,686.66 mi (7,542.45 km) |
| Huntington to Opa-locka (Florida) | 4,360.26 mi (7,017.16 km) |
| Huntington to Opelika (Alabama) | 4,211.90 mi (6,778.40 km) |
| Huntington to Opelousas (Louisiana) | 4,581.97 mi (7,373.98 km) |
| Huntington to Orange (California) | 5,299.82 mi (8,529.24 km) |
| Huntington to Orange (Texas) | 4,667.33 mi (7,511.35 km) |
| Huntington to Orange City (Florida) | 4,242.96 mi (6,828.39 km) |
| Huntington to Orangeburg (South Carolina) | 3,992.94 mi (6,426.01 km) |
