| East San Gabriel to Orbetello | 6,251.81 mi (10,061.32 km) |
| East San Gabriel to Oria | 6,560.87 mi (10,558.70 km) |
| East San Gabriel to Oristano | 6,295.49 mi (10,131.61 km) |
| East San Gabriel to Orta Nova | 6,455.35 mi (10,388.89 km) |
| East San Gabriel to Orte | 6,288.71 mi (10,120.71 km) |
| East San Gabriel to Ortona | 6,358.45 mi (10,232.93 km) |
| East San Gabriel to Orvieto | 6,266.03 mi (10,084.21 km) |
| East San Gabriel to Orzinuovi | 6,054.63 mi (9,743.98 km) |
| East San Gabriel to Osimo | 6,268.18 mi (10,087.66 km) |
| East San Gabriel to Ospitaletto | 6,050.92 mi (9,738.01 km) |
| East San Gabriel to Ostuni | 6,546.22 mi (10,535.13 km) |
| East San Gabriel to Ottaviano | 6,442.95 mi (10,368.92 km) |
| East San Gabriel to Ovada | 6,052.80 mi (9,741.03 km) |
| East San Gabriel to Ozieri | 6,274.72 mi (10,098.19 km) |
| East San Gabriel to Paceco | 6,534.40 mi (10,516.10 km) |
