| Hacienda Heights to Orbetello | 6,255.06 mi (10,066.55 km) |
| Hacienda Heights to Oria | 6,564.56 mi (10,564.64 km) |
| Hacienda Heights to Oristano | 6,298.20 mi (10,135.98 km) |
| Hacienda Heights to Orta Nova | 6,458.93 mi (10,394.64 km) |
| Hacienda Heights to Orte | 6,292.08 mi (10,126.12 km) |
| Hacienda Heights to Ortona | 6,361.99 mi (10,238.64 km) |
| Hacienda Heights to Orvieto | 6,269.40 mi (10,089.62 km) |
| Hacienda Heights to Orzinuovi | 6,058.08 mi (9,749.54 km) |
| Hacienda Heights to Osimo | 6,271.76 mi (10,093.42 km) |
| Hacienda Heights to Ospitaletto | 6,054.40 mi (9,743.61 km) |
| Hacienda Heights to Ostuni | 6,549.93 mi (10,541.09 km) |
| Hacienda Heights to Ottaviano | 6,446.35 mi (10,374.39 km) |
| Hacienda Heights to Ovada | 6,056.05 mi (9,746.27 km) |
| Hacienda Heights to Ozieri | 6,277.55 mi (10,102.74 km) |
| Hacienda Heights to Paceco | 6,537.30 mi (10,520.76 km) |
