| Rowland Heights to Orbetello | 6,253.83 mi (10,064.56 km) |
| Rowland Heights to Oria | 6,563.55 mi (10,563.01 km) |
| Rowland Heights to Oristano | 6,296.70 mi (10,133.57 km) |
| Rowland Heights to Orta Nova | 6,457.86 mi (10,392.92 km) |
| Rowland Heights to Orte | 6,290.90 mi (10,124.23 km) |
| Rowland Heights to Ortona | 6,360.91 mi (10,236.90 km) |
| Rowland Heights to Orvieto | 6,268.22 mi (10,087.73 km) |
| Rowland Heights to Orzinuovi | 6,056.95 mi (9,747.72 km) |
| Rowland Heights to Osimo | 6,270.69 mi (10,091.70 km) |
| Rowland Heights to Ospitaletto | 6,053.28 mi (9,741.82 km) |
| Rowland Heights to Ostuni | 6,548.93 mi (10,539.48 km) |
| Rowland Heights to Ottaviano | 6,445.19 mi (10,372.53 km) |
| Rowland Heights to Ovada | 6,054.82 mi (9,744.29 km) |
| Rowland Heights to Ozieri | 6,276.11 mi (10,100.42 km) |
| Rowland Heights to Paceco | 6,535.89 mi (10,518.50 km) |
