| Menlo Park to Orbetello | 6,185.92 mi (9,955.28 km) |
| Menlo Park to Oria | 6,479.46 mi (10,427.69 km) |
| Menlo Park to Oristano | 6,247.06 mi (10,053.67 km) |
| Menlo Park to Orta Nova | 6,378.05 mi (10,264.48 km) |
| Menlo Park to Orte | 6,218.92 mi (10,008.38 km) |
| Menlo Park to Ortona | 6,282.35 mi (10,110.46 km) |
| Menlo Park to Orvieto | 6,196.28 mi (9,971.95 km) |
| Menlo Park to Orzinuovi | 5,982.65 mi (9,628.14 km) |
| Menlo Park to Osimo | 6,191.44 mi (9,964.17 km) |
| Menlo Park to Ospitaletto | 5,977.97 mi (9,620.62 km) |
| Menlo Park to Ostuni | 6,464.28 mi (10,403.26 km) |
| Menlo Park to Ottaviano | 6,371.40 mi (10,253.77 km) |
| Menlo Park to Ovada | 5,987.41 mi (9,635.81 km) |
| Menlo Park to Ozieri | 6,222.51 mi (10,014.16 km) |
| Menlo Park to Paceco | 6,478.99 mi (10,426.93 km) |
