| Hormigueros to Orbetello | 4,794.56 mi (7,716.10 km) |
| Hormigueros to Oria | 5,143.02 mi (8,276.89 km) |
| Hormigueros to Oristano | 4,676.65 mi (7,526.34 km) |
| Hormigueros to Orta Nova | 5,034.17 mi (8,101.72 km) |
| Hormigueros to Orte | 4,853.85 mi (7,811.51 km) |
| Hormigueros to Ortona | 4,956.70 mi (7,977.04 km) |
| Hormigueros to Orvieto | 4,837.82 mi (7,785.71 km) |
| Hormigueros to Orzinuovi | 4,712.80 mi (7,584.52 km) |
| Hormigueros to Osimo | 4,900.20 mi (7,886.11 km) |
| Hormigueros to Ospitaletto | 4,718.79 mi (7,594.15 km) |
| Hormigueros to Ostuni | 5,137.44 mi (8,267.90 km) |
| Hormigueros to Ottaviano | 4,975.95 mi (8,008.02 km) |
| Hormigueros to Ovada | 4,653.62 mi (7,489.28 km) |
| Hormigueros to Ozieri | 4,693.79 mi (7,553.92 km) |
| Hormigueros to Paceco | 4,904.00 mi (7,892.22 km) |
