| San Ramon to Orbetello | 6,162.01 mi (9,916.80 km) |
| San Ramon to Oria | 6,455.57 mi (10,389.23 km) |
| San Ramon to Oristano | 6,223.19 mi (10,015.26 km) |
| San Ramon to Orta Nova | 6,354.15 mi (10,226.01 km) |
| San Ramon to Orte | 6,195.00 mi (9,969.89 km) |
| San Ramon to Ortona | 6,258.44 mi (10,071.99 km) |
| San Ramon to Orvieto | 6,172.36 mi (9,933.46 km) |
| San Ramon to Orzinuovi | 5,958.73 mi (9,589.65 km) |
| San Ramon to Osimo | 6,167.54 mi (9,925.69 km) |
| San Ramon to Ospitaletto | 5,954.06 mi (9,582.13 km) |
| San Ramon to Ostuni | 6,440.39 mi (10,364.81 km) |
| San Ramon to Ottaviano | 6,347.48 mi (10,215.29 km) |
| San Ramon to Ovada | 5,963.50 mi (9,597.32 km) |
| San Ramon to Ozieri | 6,198.63 mi (9,975.73 km) |
| San Ramon to Paceco | 6,455.09 mi (10,388.47 km) |
