| Huercal-Overa to Oswego (Illinois) | 4,410.47 mi (7,097.97 km) |
| Huercal-Overa to Oswego (New York) | 3,812.28 mi (6,135.27 km) |
| Huercal-Overa to Otsego (Minnesota) | 4,524.96 mi (7,282.22 km) |
| Huercal-Overa to Ottawa (Illinois) | 4,443.45 mi (7,151.05 km) |
| Huercal-Overa to Ottawa (Kansas) | 4,833.64 mi (7,778.99 km) |
| Huercal-Overa to Ottumwa (Iowa) | 4,617.76 mi (7,431.57 km) |
| Huercal-Overa to Overland (Missouri) | 4,604.34 mi (7,409.98 km) |
| Huercal-Overa to Overland Park (Kansas) | 4,796.76 mi (7,719.64 km) |
| Huercal-Overa to Overlea (Maryland) | 3,920.63 mi (6,309.65 km) |
| Huercal-Overa to Oviedo (Florida) | 4,497.34 mi (7,237.76 km) |
| Huercal-Overa to Owasso (Oklahoma) | 4,946.47 mi (7,960.58 km) |
| Huercal-Overa to Owatonna (Minnesota) | 4,548.06 mi (7,319.40 km) |
| Huercal-Overa to Owensboro (Kentucky) | 4,482.80 mi (7,214.36 km) |
| Huercal-Overa to Owings Mills (Maryland) | 3,932.71 mi (6,329.08 km) |
| Huercal-Overa to Owosso (Michigan) | 4,179.88 mi (6,726.87 km) |
