| Hercules to Orbetello | 6,157.16 mi (9,908.99 km) |
| Hercules to Oria | 6,449.48 mi (10,379.44 km) |
| Hercules to Oristano | 6,219.63 mi (10,009.52 km) |
| Hercules to Orta Nova | 6,348.39 mi (10,216.75 km) |
| Hercules to Orte | 6,189.85 mi (9,961.60 km) |
| Hercules to Ortona | 6,252.80 mi (10,062.91 km) |
| Hercules to Orvieto | 6,167.22 mi (9,925.18 km) |
| Hercules to Orzinuovi | 5,953.48 mi (9,581.20 km) |
| Hercules to Osimo | 6,161.87 mi (9,916.58 km) |
| Hercules to Ospitaletto | 5,948.74 mi (9,573.56 km) |
| Hercules to Ostuni | 6,434.27 mi (10,354.96 km) |
| Hercules to Ottaviano | 6,342.16 mi (10,206.72 km) |
| Hercules to Ovada | 5,958.74 mi (9,589.66 km) |
| Hercules to Ozieri | 6,194.79 mi (9,969.55 km) |
| Hercules to Paceco | 6,450.95 mi (10,381.79 km) |
