| Fallbrook to Orbetello | 6,265.85 mi (10,083.91 km) |
| Fallbrook to Oria | 6,578.04 mi (10,586.34 km) |
| Fallbrook to Oristano | 6,305.67 mi (10,147.99 km) |
| Fallbrook to Orta Nova | 6,471.71 mi (10,415.22 km) |
| Fallbrook to Orte | 6,303.58 mi (10,144.62 km) |
| Fallbrook to Ortona | 6,374.63 mi (10,258.97 km) |
| Fallbrook to Orvieto | 6,280.90 mi (10,108.14 km) |
| Fallbrook to Orzinuovi | 6,070.17 mi (9,768.99 km) |
| Fallbrook to Osimo | 6,284.58 mi (10,114.05 km) |
| Fallbrook to Ospitaletto | 6,066.67 mi (9,763.36 km) |
| Fallbrook to Ostuni | 6,563.52 mi (10,562.97 km) |
| Fallbrook to Ottaviano | 6,458.06 mi (10,393.24 km) |
| Fallbrook to Ovada | 6,066.89 mi (9,763.72 km) |
| Fallbrook to Ozieri | 6,285.74 mi (10,115.93 km) |
| Fallbrook to Paceco | 6,545.89 mi (10,534.59 km) |
