| Gilroy to Orbetello | 6,195.67 mi (9,970.97 km) |
| Gilroy to Oria | 6,491.47 mi (10,447.02 km) |
| Gilroy to Oristano | 6,254.40 mi (10,065.49 km) |
| Gilroy to Orta Nova | 6,389.46 mi (10,282.84 km) |
| Gilroy to Orte | 6,229.22 mi (10,024.96 km) |
| Gilroy to Ortona | 6,293.55 mi (10,128.49 km) |
| Gilroy to Orvieto | 6,206.57 mi (9,988.50 km) |
| Gilroy to Orzinuovi | 5,993.16 mi (9,645.06 km) |
| Gilroy to Osimo | 6,202.70 mi (9,982.28 km) |
| Gilroy to Ospitaletto | 5,988.62 mi (9,637.75 km) |
| Gilroy to Ostuni | 6,476.36 mi (10,422.70 km) |
| Gilroy to Ottaviano | 6,382.00 mi (10,270.84 km) |
| Gilroy to Ovada | 5,997.01 mi (9,651.25 km) |
| Gilroy to Ozieri | 6,230.37 mi (10,026.81 km) |
| Gilroy to Paceco | 6,487.40 mi (10,440.45 km) |
