| Huercal-Overa to Oakley (California) | 5,969.27 mi (9,606.61 km) |
| Huercal-Overa to Oakton (Virginia) | 3,972.38 mi (6,392.93 km) |
| Huercal-Overa to Oakville (Missouri) | 4,610.68 mi (7,420.17 km) |
| Huercal-Overa to Oatfield (Oregon) | 5,630.57 mi (9,061.53 km) |
| Huercal-Overa to Ocala (Florida) | 4,529.19 mi (7,289.03 km) |
| Huercal-Overa to Ocean Acres (New Jersey) | 3,800.73 mi (6,116.69 km) |
| Huercal-Overa to Ocean City (New Jersey) | 3,829.19 mi (6,162.49 km) |
| Huercal-Overa to Ocean Pines (Maryland) | 3,880.33 mi (6,244.79 km) |
| Huercal-Overa to Ocean Pointe (Hawaii) | 8,093.10 mi (13,024.59 km) |
| Huercal-Overa to Ocean Springs (Mississippi) | 4,824.25 mi (7,763.88 km) |
| Huercal-Overa to Oceanside (California) | 6,029.02 mi (9,702.78 km) |
| Huercal-Overa to Oceanside (New York) | 3,746.17 mi (6,028.88 km) |
| Huercal-Overa to Ocoee (Florida) | 4,518.15 mi (7,271.26 km) |
| Huercal-Overa to Oconomowoc (Wisconsin) | 4,372.18 mi (7,036.35 km) |
| Huercal-Overa to Odenton (Maryland) | 3,937.57 mi (6,336.91 km) |
