| Huercal-Overa to Orangevale (California) | 5,916.83 mi (9,522.22 km) |
| Huercal-Overa to Orchards (Washington) | 5,614.65 mi (9,035.90 km) |
| Huercal-Overa to Orcutt (California) | 6,075.29 mi (9,777.23 km) |
| Huercal-Overa to Oregon (Ohio) | 4,185.33 mi (6,735.64 km) |
| Huercal-Overa to Oregon (Wisconsin) | 4,417.80 mi (7,109.76 km) |
| Huercal-Overa to Oregon City (Oregon) | 5,634.05 mi (9,067.12 km) |
| Huercal-Overa to Orem (Utah) | 5,470.77 mi (8,804.36 km) |
| Huercal-Overa to Orinda (California) | 5,993.06 mi (9,644.89 km) |
| Huercal-Overa to Orland Park (Illinois) | 4,391.21 mi (7,066.98 km) |
| Huercal-Overa to Orlando (Florida) | 4,511.52 mi (7,260.59 km) |
| Huercal-Overa to Ormond Beach (Florida) | 4,470.43 mi (7,194.46 km) |
| Huercal-Overa to Oro Valley (Arizona) | 5,795.36 mi (9,326.73 km) |
| Huercal-Overa to Oroville (California) | 5,889.20 mi (9,477.75 km) |
| Huercal-Overa to Oshkosh (Wisconsin) | 4,346.03 mi (6,994.26 km) |
| Huercal-Overa to Oskaloosa (Iowa) | 4,618.26 mi (7,432.36 km) |
