| Hidalgo to Orbetello | 5,916.41 mi (9,521.54 km) |
| Hidalgo to Oria | 6,266.80 mi (10,085.44 km) |
| Hidalgo to Oristano | 5,890.26 mi (9,479.46 km) |
| Hidalgo to Orta Nova | 6,151.77 mi (9,900.32 km) |
| Hidalgo to Orte | 5,966.23 mi (9,601.73 km) |
| Hidalgo to Ortona | 6,056.29 mi (9,746.66 km) |
| Hidalgo to Orvieto | 5,944.82 mi (9,567.26 km) |
| Hidalgo to Orzinuovi | 5,755.63 mi (9,262.78 km) |
| Hidalgo to Osimo | 5,974.30 mi (9,614.71 km) |
| Hidalgo to Ospitaletto | 5,755.95 mi (9,263.31 km) |
| Hidalgo to Ostuni | 6,255.19 mi (10,066.75 km) |
| Hidalgo to Ottaviano | 6,117.58 mi (9,845.29 km) |
| Hidalgo to Ovada | 5,728.02 mi (9,218.36 km) |
| Hidalgo to Ozieri | 5,885.14 mi (9,471.22 km) |
| Hidalgo to Paceco | 6,141.00 mi (9,882.98 km) |
