| Huercal-Overa to Odessa (Texas) | 5,426.43 mi (8,732.99 km) |
| Huercal-Overa to Ogden (Utah) | 5,439.82 mi (8,754.55 km) |
| Huercal-Overa to Oildale (California) | 5,992.46 mi (9,643.94 km) |
| Huercal-Overa to Ojus (Florida) | 4,539.47 mi (7,305.57 km) |
| Huercal-Overa to Okemos (Michigan) | 4,199.33 mi (6,758.17 km) |
| Huercal-Overa to Oklahoma City (Oklahoma) | 5,056.27 mi (8,137.27 km) |
| Huercal-Overa to Okmulgee (Oklahoma) | 4,980.36 mi (8,015.12 km) |
| Huercal-Overa to Olathe (Kansas) | 4,802.96 mi (7,729.62 km) |
| Huercal-Overa to Old Jamestown (Missouri) | 4,595.48 mi (7,395.71 km) |
| Huercal-Overa to Oldsmar (Florida) | 4,596.23 mi (7,396.93 km) |
| Huercal-Overa to Olean (New York) | 3,938.57 mi (6,338.51 km) |
| Huercal-Overa to Olive Branch (Mississippi) | 4,711.12 mi (7,581.81 km) |
| Huercal-Overa to Olivehurst (California) | 5,909.89 mi (9,511.05 km) |
| Huercal-Overa to Olney (Maryland) | 3,953.82 mi (6,363.06 km) |
| Huercal-Overa to Olympia (Washington) | 5,559.17 mi (8,946.62 km) |
