| Huelva to Orbetello | 1,025.53 mi (1,650.44 km) |
| Huelva to Oria | 1,336.78 mi (2,151.33 km) |
| Huelva to Oristano | 858.10 mi (1,380.97 km) |
| Huelva to Orta Nova | 1,240.31 mi (1,996.09 km) |
| Huelva to Orte | 1,084.02 mi (1,744.55 km) |
| Huelva to Ortona | 1,183.15 mi (1,904.10 km) |
| Huelva to Orvieto | 1,074.55 mi (1,729.33 km) |
| Huelva to Orzinuovi | 1,038.17 mi (1,670.77 km) |
| Huelva to Osimo | 1,154.89 mi (1,858.62 km) |
| Huelva to Ospitaletto | 1,049.09 mi (1,688.34 km) |
| Huelva to Ostuni | 1,334.73 mi (2,148.05 km) |
| Huelva to Ottaviano | 1,173.18 mi (1,888.04 km) |
| Huelva to Ovada | 958.35 mi (1,542.31 km) |
| Huelva to Ozieri | 886.63 mi (1,426.89 km) |
| Huelva to Paceco | 1,066.48 mi (1,716.33 km) |
